"use strict"; const {Fragment: _Fragment, jsx: _jsx, jsxs: _jsxs} = arguments[0]; const {useMDXComponents: _provideComponents} = arguments[0]; function _createMdxContent(props) { const _components = { code: "code", h1: "h1", h2: "h2", h3: "h3", h4: "h4", hr: "hr", li: "li", ol: "ol", p: "p", pre: "pre", span: "span", strong: "strong", ul: "ul", ..._provideComponents(), ...props.components }; return _jsxs(_Fragment, { children: [_jsx(_components.h1, { children: "Instructions: Interactive Drawing App" }), "\n", _jsx(_components.p, { children: "Follow these comprehensive instructions to build your interactive drawing application that demonstrates mastery of React event handling coordination. This exercise consolidates everything you've learned about mouse events, keyboard interactions, click handling, and complex state management into a single, sophisticated application." }), "\n", _jsx(_components.h2, { children: "Concept Reinforcement" }), "\n", _jsx(_components.p, { children: "Before we start building, let's review the key React concepts you'll be applying in this comprehensive project:" }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Complex Event Coordination" }), ": You'll coordinate multiple event types - mouse events for drawing, click events for tool selection, keyboard events for shortcuts, and touch events for mobile support. This demonstrates how React's synthetic event system enables sophisticated multi-event applications."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Advanced State Management" }), ": You'll manage interconnected state variables (current color, brush size, drawing mode, canvas state) that affect each other and drive updates throughout the application. This shows how React state can coordinate complex application behavior."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Multi-Component Architecture" }), ": You'll organize functionality across four focused components (DrawingApp, DrawingCanvas, ColorPalette, DrawingControls), each with clear responsibilities. This demonstrates professional React component organization and separation of concerns."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Canvas Integration with React" }), ": You'll integrate HTML5 canvas drawing with React's component system, using refs to access the canvas directly while maintaining React's declarative patterns. This shows how React can work with imperative APIs."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Real-Time User Interaction" }), ": You'll create smooth, responsive drawing that provides immediate visual feedback across multiple interaction methods. This demonstrates how React can handle intensive, real-time user interactions."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Cross-Device Compatibility" }), ": You'll implement touch event support alongside mouse events, ensuring your application works seamlessly on desktop, tablet, and mobile devices through React's unified event system."] }), "\n", _jsx(_components.h2, { children: "Introduction to useEffect: React's Setup and Cleanup System" }), "\n", _jsx(_components.p, { children: "This project introduces an important React concept that you'll use extensively: the useEffect hook. While you'll learn about useEffect in detail in Module 7, we need to understand it here because our drawing application requires special setup code that runs when components first appear." }), "\n", _jsx(_components.h3, { children: "Understanding Why We Need useEffect" }), "\n", _jsx(_components.p, { children: "Think about setting up a physical workspace to understand why useEffect is necessary:" }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "The Setup Problem" }), ": When you arrive at an empty office to start work, you can't immediately begin your tasks. You need to set up your workspace first - turn on your computer, open necessary applications, arrange your desk, and prepare your tools."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "The React Challenge" }), ": Similarly, when a React component first appears on screen, sometimes it needs to do \"setup work\" before it can function properly. Our drawing canvas needs to be prepared for drawing - we need to get its drawing context, set its size, and initialize it with a white background."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "The Timing Issue" }), ": This setup work can't happen during the normal component rendering process. React components describe what the UI should look like, but setup work involves doing things to the DOM after the component has been rendered and is ready for interaction."] }), "\n", _jsx(_components.h3, { children: "What useEffect Does" }), "\n", _jsx(_components.p, { children: "useEffect is React's solution for running code at specific times in a component's lifecycle. Think of it as React's way of saying \"after you've finished rendering this component, please run this additional code.\"" }), "\n", _jsx(_components.h4, { children: "The Theater Production Analogy" }), "\n", _jsx(_components.p, { children: "Understanding useEffect is like understanding how theater productions are managed:" }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Before the Show (Component Setup)" }), ": Before the curtain rises, the crew must set up the stage, test the lighting, prepare props, and ensure everything is ready. This setup work happens after the theater is prepared but before the performance begins."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "During the Show (Component Active)" }), ": During the performance, the crew monitors everything and makes adjustments as needed - changing lighting for different scenes, managing sound levels, and ensuring smooth transitions."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "After the Show (Component Cleanup)" }), ": When the performance ends, the crew must clean up - strike the set, store props, reset the theater, and prepare for the next production."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "useEffect in React" }), ": useEffect works exactly like this theater crew management system. It lets you run setup code when your component \"opens,\" monitor and respond to changes during its \"performance,\" and clean up when it's time to \"close.\""] }), "\n", _jsx(_components.h3, { children: "useEffect Basic Syntax" }), "\n", _jsx(_components.p, { children: "useEffect follows a simple, predictable pattern that you'll use throughout your React development:" }), "\n", _jsx(_components.pre, { className: "language-jsx", children: _jsxs(_components.code, { className: "language-jsx code-highlight", children: [_jsxs(_components.span, { className: "code-line line-number", line: "1", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsxs(_components.span, { className: "token imports", children: [_jsx(_components.span, { className: "token maybe-class-name", children: "React" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), " useEffect ", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'react'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "2", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "3", children: [_jsx(_components.span, { className: "token keyword", children: "function" }), " ", _jsx(_components.span, { className: "token function", children: _jsx(_components.span, { className: "token maybe-class-name", children: "MyComponent" }) }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), 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_jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "10", children: [" ", _jsx(_components.span, { className: "token console class-name", children: "console" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "log" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'Component is being removed!'" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "11", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "12", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), " ", _jsx(_components.span, { className: "token comment", children: "// Empty array means \"run once when component loads\"" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "13", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "14", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "return" }), " ", _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "<" }), "div"] }), _jsx(_components.span, { className: "token punctuation", children: ">" })] }), _jsx(_components.span, { className: "token plain-text", children: "My Component" }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "" })] }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "15", children: [_jsx(_components.span, { className: "token punctuation", children: "}" }), "\n"] })] }) }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "The Three Parts of useEffect" }), ":"] }), "\n", _jsxs(_components.ol, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "The Setup Function" }), ": The code that runs when the component loads"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "The Cleanup Function" }), " (optional): Code that runs when the component is removed"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "The Dependency Array" }), ": Controls when the effect should run (empty array = run once)"] }), "\n"] }), "\n", _jsx(_components.h3, { children: "useEffect for Canvas Preparation" }), "\n", _jsx(_components.p, { children: "In our drawing application, we use useEffect to prepare the canvas for drawing:" }), "\n", _jsx(_components.pre, { className: "language-jsx", children: _jsxs(_components.code, { className: "language-jsx code-highlight", children: [_jsxs(_components.span, { className: "code-line line-number", line: "1", children: [_jsx(_components.span, { className: "token function", children: "useEffect" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "2", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " canvas ", _jsx(_components.span, { className: "token operator", children: "=" }), " canvasRef", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "current" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "3", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ctx ", _jsx(_components.span, { className: "token operator", children: "=" }), " canvas", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "getContext" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'2d'" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "4", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "5", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Initialize canvas with white background" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "6", children: [" ctx", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "fillStyle" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token string", children: "'#ffffff'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "7", children: [" ctx", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "fillRect" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token number", children: "0" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token number", children: "0" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " canvas", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "width" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " canvas", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "height" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "8", children: [_jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), " ", _jsx(_components.span, { className: "token comment", children: "// Run once when component loads" }), "\n"] })] }) }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Why We Need This" }), ":"] }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Timing" }), ": The canvas element must exist before we can prepare it for drawing"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Setup" }), ": We get the canvas drawing context and set up the initial white background"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "One-Time" }), ": This setup only needs to happen once when the component first loads"] }), "\n"] }), "\n", _jsx(_components.h3, { children: "useEffect for Responsive Canvas Sizing" }), "\n", _jsx(_components.p, { children: "We also use useEffect to make our canvas responsive to window size changes:" }), "\n", _jsx(_components.pre, { className: "language-jsx", children: _jsxs(_components.code, { className: "language-jsx code-highlight", children: [_jsxs(_components.span, { className: "code-line line-number", line: "1", children: [_jsx(_components.span, { className: "token function", children: "useEffect" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "2", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ", _jsx(_components.span, { className: "token function-variable function", children: "updateCanvasSize" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "3", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Calculate new canvas size based on container" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "4", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Update canvas dimensions" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "5", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "6", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "7", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Set up initial size and listen for window changes" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "8", children: [" ", _jsx(_components.span, { className: "token function", children: "updateCanvasSize" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "9", children: [" ", _jsx(_components.span, { className: "token dom variable", children: "window" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "addEventListener" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'resize'" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " updateCanvasSize", _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "10", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "11", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Cleanup: remove listener when component is removed" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "12", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "return" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "13", children: [" ", _jsx(_components.span, { className: "token dom variable", children: "window" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "removeEventListener" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'resize'" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " updateCanvasSize", _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "14", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "15", children: [_jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), " ", _jsx(_components.span, { className: "token comment", children: "// Run once to set up the resize listener" }), "\n"] })] }) }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "The Setup/Cleanup Pattern" }), ":"] }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Setup" }), ": Calculate initial canvas size and add a window resize listener"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Cleanup" }), ": Remove the resize listener when the component is removed to prevent memory leaks"] }), "\n"] }), "\n", _jsx(_components.h3, { children: "useEffect for Global Keyboard Shortcuts" }), "\n", _jsx(_components.p, { children: "Finally, we use useEffect for keyboard shortcuts that work throughout the application:" }), "\n", _jsx(_components.pre, { className: "language-jsx", children: _jsxs(_components.code, { className: "language-jsx code-highlight", children: [_jsxs(_components.span, { className: "code-line line-number", line: "1", children: [_jsx(_components.span, { className: "token function", children: "useEffect" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "2", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ", _jsx(_components.span, { className: "token function-variable function", children: "handleKeyPress" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token parameter", children: "event" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "3", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "if" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), "event", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "code" }), " ", _jsx(_components.span, { className: "token operator", children: "===" }), " ", _jsx(_components.span, { className: "token string", children: "'Space'" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "4", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Handle spacebar press for mode toggle" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "5", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), " ", _jsx(_components.span, { className: "token keyword control-flow", children: "else" }), " ", _jsx(_components.span, { className: "token keyword control-flow", children: "if" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), "event", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "key" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "toLowerCase" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token operator", children: "===" }), " ", _jsx(_components.span, { className: "token string", children: "'c'" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "6", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Handle 'c' key press for canvas clearing" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "7", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "8", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "9", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "10", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Add global keyboard listener" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "11", children: [" ", _jsx(_components.span, { className: "token dom variable", children: "window" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "addEventListener" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'keydown'" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " handleKeyPress", _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "12", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "13", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Cleanup: remove listener when component is removed" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "14", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "return" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "15", children: [" ", _jsx(_components.span, { className: "token dom variable", children: "window" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "removeEventListener" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'keydown'" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " handleKeyPress", _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "16", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "17", children: [_jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), "drawingMode", _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), " ", _jsx(_components.span, { className: "token comment", children: "// Include drawingMode so handler has current value" }), "\n"] })] }) }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Dependency Array Usage" }), ": Including ", _jsx(_components.code, { children: "drawingMode" }), " in the dependency array ensures the keyboard handler always has access to the current drawing mode value."] }), "\n", _jsx(_components.h3, { children: "The Coffee Shop Analogy for useEffect" }), "\n", _jsx(_components.p, { children: "Think of useEffect like managing a coffee shop:" }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Opening Procedures (Component Mount)" }), ": Before the coffee shop opens, staff must prepare everything - start the espresso machine, grind coffee beans, set up the register, arrange pastries, and unlock the doors."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Operating Hours (Component Active)" }), ": During business hours, the shop serves customers and maintains operations, but the basic setup remains in place."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Closing Procedures (Component Cleanup)" }), ": When the shop closes, staff must clean up - turn off equipment, clean machines, secure the register, and prepare for the next day."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "useEffect in React" }), ": useEffect manages this same lifecycle for React components - setup when they load, maintenance during their active period, and cleanup when they're removed."] }), "\n", _jsx(_components.h3, { children: "Why useEffect is Perfect for Our Drawing App" }), "\n", _jsx(_components.p, { children: "Our drawing application has several needs that useEffect solves perfectly:" }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Canvas Initialization" }), ": The canvas needs to be prepared for drawing with the correct size and background color."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Responsive Behavior" }), ": The canvas needs to resize when the browser window changes size."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Global Keyboard Shortcuts" }), ": Keyboard shortcuts need to work regardless of which component currently has focus."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Memory Management" }), ": Event listeners need to be properly cleaned up to prevent memory leaks."] }), "\n", _jsx(_components.p, { children: "useEffect provides the perfect solution for all these needs, giving us precise control over when setup and cleanup code runs." }), "\n", _jsx(_components.h2, { children: "The Challenge" }), "\n", _jsx(_components.p, { children: "Create a complete interactive drawing application that showcases advanced React event handling:" }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Interactive Drawing Canvas" }), ": Smooth drawing with mouse drag interactions and touch support"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Color Selection Palette" }), ": Six color options with visual selection feedback"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Drawing Controls Panel" }), ": Brush size selector, clear button, and drawing mode toggle"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Keyboard Shortcuts" }), ": Spacebar to toggle draw/erase mode, 'c' key to clear canvas"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Professional Interface" }), ": Clean, responsive design with immediate visual feedback"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Component Architecture" }), ": Well-organized code across multiple focused components"] }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Success Criteria:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsx(_components.li, { children: "✅ Users can draw smooth, continuous lines on the canvas using mouse or touch" }), "\n", _jsx(_components.li, { children: "✅ Six color options with clear visual selection indicators and immediate feedback" }), "\n", _jsx(_components.li, { children: "✅ Three brush sizes (small, medium, large) with visual size indicators" }), "\n", _jsx(_components.li, { children: "✅ Clear canvas button that resets the drawing surface completely" }), "\n", _jsx(_components.li, { children: "✅ Drawing mode toggle between draw and erase functionality" }), "\n", _jsx(_components.li, { children: "✅ Keyboard shortcuts work seamlessly with mouse interactions" }), "\n", _jsx(_components.li, { children: "✅ Touch events work smoothly on mobile devices" }), "\n", _jsx(_components.li, { children: "✅ Professional component architecture with proper imports/exports" }), "\n", _jsx(_components.li, { children: "✅ All interactions provide immediate, clear visual feedback" }), "\n"] }), "\n", _jsx(_components.h2, { children: "Independent Learning Opportunity" }), "\n", _jsx(_components.p, { children: "Before looking at the step-by-step guide below, try building this drawing application yourself! Use these React concepts you've mastered:" }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "React Concepts to Apply:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsx(_components.li, { children: "Multi-component architecture with clear separation of concerns" }), "\n", _jsx(_components.li, { children: "useState hook for managing complex, interconnected state" }), "\n", _jsx(_components.li, { children: "useRef hook for direct canvas element access" }), "\n", _jsx(_components.li, { children: "useEffect hook for setting up event listeners and canvas initialization" }), "\n", _jsx(_components.li, { children: "Event handler coordination across multiple event types" }), "\n", _jsx(_components.li, { children: "Props and state flow between parent and child components" }), "\n", _jsx(_components.li, { children: "Dynamic CSS classes and styling based on component state" }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Conceptual Approach:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsx(_components.li, { children: "Think about what data needs to change over time (colors, brush size, drawing mode, canvas state)" }), "\n", _jsx(_components.li, { children: "Consider what user actions need to trigger changes (clicks, mouse movements, keyboard presses, touch gestures)" }), "\n", _jsx(_components.li, { children: "Plan how components should communicate (props down, events up)" }), "\n", _jsx(_components.li, { children: "Design the canvas drawing logic (coordinate translation, drawing context management)" }), "\n", _jsx(_components.li, { children: "Organize event handlers for different interaction types" }), "\n"] }), "\n", _jsx(_components.p, { children: "Try building it yourself first - this is a comprehensive project that will challenge your understanding! The step-by-step guide below will help you understand each React concept and implementation decision." }), "\n", _jsx(_components.hr, {}), "\n", _jsx(_components.h2, { children: "Step-by-Step React Implementation Guide" }), "\n", _jsx(_components.p, { children: "If you need guidance or want to understand each React concept in detail, follow these comprehensive steps:" }), "\n", _jsx(_components.h3, { children: "Step 1: Create the Main DrawingApp Component" }), "\n", _jsxs(_components.p, { children: ["Create the main ", _jsx(_components.code, { children: "DrawingApp.js" }), " component that will coordinate the entire application. This component demonstrates React's state management for complex applications and shows how to organize multiple child components."] }), "\n", _jsx(_components.pre, { className: "language-jsx", children: _jsxs(_components.code, { className: "language-jsx code-highlight", children: [_jsxs(_components.span, { className: "code-line line-number", line: "1", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsxs(_components.span, { className: "token imports", children: [_jsx(_components.span, { className: "token maybe-class-name", children: "React" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), " useState", _jsx(_components.span, { className: "token punctuation", children: "," }), " useEffect ", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'react'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "2", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsx(_components.span, { className: "token imports", children: _jsx(_components.span, { className: "token maybe-class-name", children: "DrawingCanvas" }) }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'./DrawingCanvas'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "3", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsx(_components.span, { className: "token imports", children: _jsx(_components.span, { className: "token maybe-class-name", children: "ColorPalette" }) }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'./ColorPalette'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "4", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsx(_components.span, { className: "token imports", children: _jsx(_components.span, { className: "token maybe-class-name", children: "DrawingControls" }) }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'./DrawingControls'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "5", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "6", children: [_jsx(_components.span, { className: "token keyword", children: "function" }), " ", _jsx(_components.span, { className: "token function", children: _jsx(_components.span, { className: "token maybe-class-name", children: "DrawingApp" }) }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "7", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), "currentColor", _jsx(_components.span, { className: "token punctuation", children: "," }), " setCurrentColor", _jsx(_components.span, { className: "token punctuation", children: "]" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token function", children: "useState" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'#2563eb'" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "8", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), "brushSize", _jsx(_components.span, { className: "token punctuation", children: "," }), " setBrushSize", _jsx(_components.span, { className: "token punctuation", children: "]" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token function", children: "useState" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'medium'" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "9", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), "drawingMode", _jsx(_components.span, { className: "token punctuation", children: "," }), " setDrawingMode", _jsx(_components.span, { className: "token punctuation", children: "]" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token function", children: "useState" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token string", children: "'draw'" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "10", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "11", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "return" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "12", children: [" ", _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "<" }), "div"] }), " ", _jsx(_components.span, { className: "token attr-name", children: "className" }), _jsxs(_components.span, { className: "token attr-value", children: [_jsx(_components.span, { className: "token punctuation attr-equals", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "\"" }), "drawing-app", _jsx(_components.span, { className: "token punctuation", children: "\"" })] }), _jsx(_components.span, { className: "token punctuation", children: ">" })] }), _jsx(_components.span, { className: "token plain-text", children: "\n" })] }), _jsxs(_components.span, { className: "code-line line-number", line: "13", children: [_jsx(_components.span, { className: "token plain-text", children: " " }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "<" }), "div"] }), " ", _jsx(_components.span, { className: "token attr-name", children: "className" }), _jsxs(_components.span, { className: "token attr-value", children: [_jsx(_components.span, { className: "token punctuation attr-equals", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "\"" }), "app-header", _jsx(_components.span, { className: "token punctuation", children: "\"" })] }), _jsx(_components.span, { className: "token punctuation", children: ">" })] }), _jsx(_components.span, { className: "token plain-text", children: "\n" })] }), _jsxs(_components.span, { className: "code-line line-number", line: "14", children: [_jsx(_components.span, { className: "token plain-text", children: " " }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "<" }), "h1"] }), _jsx(_components.span, { className: "token punctuation", children: ">" })] }), _jsx(_components.span, { className: "token plain-text", children: "Interactive Drawing App" }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "" })] }), _jsx(_components.span, { className: "token plain-text", children: "\n" })] }), _jsxs(_components.span, { className: "code-line line-number", line: "15", children: [_jsx(_components.span, { className: "token plain-text", children: " " }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "<" }), "p"] }), _jsx(_components.span, { className: "token punctuation", children: ">" })] }), _jsx(_components.span, { className: "token plain-text", children: "\n" })] }), _jsx(_components.span, { className: "code-line line-number", line: "16", children: _jsx(_components.span, { className: "token plain-text", 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_jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "13", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "if" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), "containerRef", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "current" }), " ", _jsx(_components.span, { className: "token operator", children: "&&" }), " canvasRef", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "current" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "14", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " container ", _jsx(_components.span, { className: "token operator", children: "=" }), " containerRef", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "current" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "15", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " containerWidth ", _jsx(_components.span, { className: "token operator", children: "=" }), " container", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token 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children: "// Maintain 3:2 aspect ratio" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "17", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " newWidth ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token known-class-name class-name", children: "Math" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "min" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), "containerWidth", _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token number", children: "600" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), " ", _jsx(_components.span, 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_jsx(_components.span, { className: "token keyword", children: "const" }), " canvas ", _jsx(_components.span, { className: "token operator", children: "=" }), " canvasRef", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "current" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "24", children: [" canvas", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "width" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " newWidth", _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "25", children: [" canvas", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "height" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " newHeight", _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "26", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "27", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Initialize canvas with white background" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "28", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ctx ", _jsx(_components.span, { className: "token operator", children: "=" }), " canvas", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: 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_jsx(_components.span, { className: "token method function property-access", children: "fillRect" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token number", children: "0" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token number", children: "0" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " newWidth", _jsx(_components.span, { className: "token punctuation", children: "," }), " newHeight", _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "31", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "32", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "33", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "34", children: [" ", _jsx(_components.span, { className: "token comment", children: "// Initial sizing and resize listener" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "35", children: [" ", _jsx(_components.span, { className: "token function", children: "updateCanvasSize" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "36", children: [" ", _jsx(_components.span, { className: 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";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "40", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "41", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token punctuation", children: "[" }), _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "42", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "43", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ", _jsx(_components.span, { className: "token function-variable function", children: "getBrushWidth" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "44", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " sizes ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), " ", _jsx(_components.span, { className: "token literal-property property", children: "small" }), _jsx(_components.span, { className: "token operator", children: ":" }), " ", _jsx(_components.span, { className: "token number", children: "2" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token literal-property property", children: "medium" }), _jsx(_components.span, { className: "token operator", children: ":" }), " ", _jsx(_components.span, { className: "token number", children: "5" }), _jsx(_components.span, { className: "token punctuation", children: "," }), " ", _jsx(_components.span, { className: "token literal-property property", children: "large" }), _jsx(_components.span, { className: "token operator", children: ":" }), " ", _jsx(_components.span, { className: "token number", children: "10" }), " ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "45", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "return" }), " sizes", _jsx(_components.span, { className: "token punctuation", children: "[" }), "brushSize", _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "46", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "}" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "47", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "48", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " ", _jsx(_components.span, { className: "token function-variable function", children: "getCanvasCoordinates" }), " ", _jsx(_components.span, { className: "token operator", children: "=" }), " ", _jsx(_components.span, { className: "token parameter", children: "event" }), " ", _jsx(_components.span, { className: "token arrow operator", children: "=>" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "49", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " canvas ", _jsx(_components.span, { className: "token operator", children: "=" }), " canvasRef", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "current" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "50", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " rect ", _jsx(_components.span, { className: "token operator", children: "=" }), " canvas", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token method function property-access", children: "getBoundingClientRect" }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "51", children: [" ", _jsx(_components.span, { className: "token keyword", children: "const" }), " clientX ", _jsx(_components.span, { className: "token operator", children: "=" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "52", children: [" event", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "clientX" }), " ", _jsx(_components.span, { className: "token operator", children: "||" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), "event", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "touches" }), " ", _jsx(_components.span, { className: "token operator", children: "&&" }), " event", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "touches" }), _jsx(_components.span, { className: "token punctuation", children: "[" }), _jsx(_components.span, { className: "token number", children: "0" }), _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token 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"token property-access", children: "touches" }), " ", _jsx(_components.span, { className: "token operator", children: "&&" }), " event", _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "touches" }), _jsx(_components.span, { className: "token punctuation", children: "[" }), _jsx(_components.span, { className: "token number", children: "0" }), _jsx(_components.span, { className: "token punctuation", children: "]" }), _jsx(_components.span, { className: "token punctuation", children: "." }), _jsx(_components.span, { className: "token property-access", children: "clientY" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "55", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: 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children: "selected" }), ") provide visual feedback for the current selection"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "currentColor === color.value" }), " determines which color button shows as selected"] }), "\n", _jsx(_components.li, { children: "The current color preview provides additional visual feedback using inline styles" }), "\n"] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "React Concept Applied" }), ": This demonstrates React's event handling for collections, conditional rendering for visual feedback, and how props enable parent-child communication for state updates."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Click \"Run\"" }), " and try clicking different color buttons! You should see the selection indicator move and the current color preview update."] }), "\n", _jsx(_components.h3, { children: "Step 4: Create the DrawingControls Component" }), "\n", _jsxs(_components.p, { children: ["Create the ", _jsx(_components.code, { children: "DrawingControls.js" }), " component that manages brush size, drawing mode, and canvas clearing. This component demonstrates multiple event types and complex state interactions."] }), "\n", _jsx(_components.pre, { className: "language-jsx", children: _jsxs(_components.code, { className: "language-jsx code-highlight", children: [_jsxs(_components.span, { className: "code-line line-number", line: "1", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsx(_components.span, { className: "token imports", children: _jsx(_components.span, { className: "token maybe-class-name", children: "React" }) }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'react'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "2", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "3", children: 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language-javascript", children: [_jsx(_components.span, { className: "token script-punctuation punctuation", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "{" }), "draw", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), "\n"] }) }), _jsx(_components.span, { className: "code-line line-number", line: "87", children: _jsxs(_components.span, { className: "token tag", children: [" ", _jsx(_components.span, { className: "token attr-name", children: "onMouseUp" }), _jsxs(_components.span, { className: "token script language-javascript", children: [_jsx(_components.span, { className: "token script-punctuation punctuation", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "{" }), "stopDrawing", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), "\n"] }) }), _jsx(_components.span, { className: "code-line line-number", line: "88", children: _jsxs(_components.span, { className: "token tag", children: [" ", _jsx(_components.span, { className: "token attr-name", children: "onMouseLeave" }), _jsxs(_components.span, { className: "token script language-javascript", children: [_jsx(_components.span, { className: "token script-punctuation punctuation", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "{" }), "stopDrawing", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), "\n"] }) }), _jsx(_components.span, { className: "code-line line-number", line: "89", children: _jsxs(_components.span, { className: "token tag", children: [" ", _jsx(_components.span, { className: "token attr-name", children: "onTouchStart" }), _jsxs(_components.span, { className: "token script language-javascript", children: [_jsx(_components.span, { className: "token script-punctuation punctuation", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "{" }), "startDrawing", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), "\n"] }) }), _jsx(_components.span, { className: "code-line line-number", line: "90", children: _jsxs(_components.span, { className: "token tag", children: [" ", _jsx(_components.span, { className: "token attr-name", children: "onTouchMove" }), _jsxs(_components.span, { className: "token script language-javascript", children: [_jsx(_components.span, { className: "token script-punctuation punctuation", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "{" }), "draw", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), "\n"] }) }), _jsx(_components.span, { className: "code-line line-number", line: "91", children: _jsxs(_components.span, { className: "token tag", children: [" ", _jsx(_components.span, { className: "token attr-name", children: "onTouchEnd" }), _jsxs(_components.span, { className: "token script language-javascript", children: [_jsx(_components.span, { className: "token script-punctuation punctuation", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "{" }), "stopDrawing", _jsx(_components.span, { className: "token punctuation", children: "}" })] }), "\n"] }) }), _jsxs(_components.span, { className: "code-line line-number", line: "92", children: [_jsxs(_components.span, { className: "token tag", children: [" ", _jsx(_components.span, { className: "token punctuation", children: "/>" })] }), _jsx(_components.span, { className: "token plain-text", children: "\n" })] }), _jsxs(_components.span, { className: "code-line line-number", line: "93", children: [_jsx(_components.span, { className: "token plain-text", children: " " }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "" })] }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "94", children: [" ", _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "95", children: [_jsx(_components.span, { className: "token punctuation", children: "}" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "96", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "97", children: [_jsx(_components.span, { className: "token keyword module", children: "export" }), " ", _jsx(_components.span, { className: "token keyword module", children: "default" }), " ", _jsx(_components.span, { className: "token maybe-class-name", children: "DrawingCanvas" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] })] }) }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Why we write this React code:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "useEffect" }), " with empty dependency array initializes the canvas with a white background"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "event.preventDefault()" }), " prevents default touch behaviors that might interfere with drawing"] }), "\n", _jsx(_components.li, { children: "Canvas clearing happens automatically when the component remounts (via key prop)" }), "\n", _jsx(_components.li, { children: "Visual indicators show current drawing mode and brush size for user feedback" }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "lineJoin: 'round'" }), " creates smoother line connections for better drawing quality"] }), "\n", _jsx(_components.li, { children: "Touch and mouse events are handled identically for consistent cross-device behavior" }), "\n"] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "React Concept Applied" }), ": This demonstrates React's component lifecycle management and how the key prop can be used to force component remounting for state reset scenarios."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Click \"Run\"" }), " and test the complete drawing application! Try all features: drawing, color selection, brush sizes, mode toggling, keyboard shortcuts, and canvas clearing."] }), "\n", _jsx(_components.h3, { children: "Step 7: Update the App Component" }), "\n", _jsxs(_components.p, { children: ["Finally, update your ", _jsx(_components.code, { children: "App.js" }), " file to import and use your complete drawing application. This demonstrates React's component composition at the application level."] }), "\n", _jsx(_components.pre, { className: "language-jsx", children: _jsxs(_components.code, { className: "language-jsx code-highlight", children: [_jsxs(_components.span, { className: "code-line line-number", line: "1", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsx(_components.span, { className: "token imports", children: _jsx(_components.span, { className: "token maybe-class-name", children: "React" }) }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'react'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "2", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsx(_components.span, { className: "token imports", children: _jsx(_components.span, { className: "token maybe-class-name", children: "DrawingApp" }) }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'./DrawingApp'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "3", children: [_jsx(_components.span, { className: "token keyword module", children: "import" }), " ", _jsx(_components.span, { className: "token string", children: "'./styles.css'" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "4", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "5", children: [_jsx(_components.span, { className: "token keyword", children: "function" }), " ", _jsx(_components.span, { className: "token function", children: _jsx(_components.span, { className: "token maybe-class-name", children: "App" }) }), _jsx(_components.span, { className: "token punctuation", children: "(" }), _jsx(_components.span, { className: "token punctuation", children: ")" }), " ", _jsx(_components.span, { className: "token punctuation", children: "{" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "6", children: [" ", _jsx(_components.span, { className: "token keyword control-flow", children: "return" }), " ", _jsx(_components.span, { className: "token punctuation", children: "(" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "7", children: [" ", _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "<" }), "div"] }), " ", _jsx(_components.span, { className: "token attr-name", children: "className" }), _jsxs(_components.span, { className: "token attr-value", children: [_jsx(_components.span, { className: "token punctuation attr-equals", children: "=" }), _jsx(_components.span, { className: "token punctuation", children: "\"" }), "App", _jsx(_components.span, { className: "token punctuation", children: "\"" })] }), _jsx(_components.span, { className: "token punctuation", children: ">" })] }), _jsx(_components.span, { className: "token plain-text", children: "\n" })] }), _jsxs(_components.span, { className: "code-line line-number", line: "8", children: [_jsx(_components.span, { className: "token plain-text", children: " " }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "<" }), _jsx(_components.span, { className: "token class-name", children: "DrawingApp" })] }), " ", _jsx(_components.span, { className: "token punctuation", children: "/>" })] }), _jsx(_components.span, { className: "token plain-text", children: "\n" })] }), _jsxs(_components.span, { className: "code-line line-number", line: "9", children: [_jsx(_components.span, { className: "token plain-text", children: " " }), _jsxs(_components.span, { className: "token tag", children: [_jsxs(_components.span, { className: "token tag", children: [_jsx(_components.span, { className: "token punctuation", children: "" })] }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "10", children: [" ", _jsx(_components.span, { className: "token punctuation", children: ")" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] }), _jsxs(_components.span, { className: "code-line line-number", line: "11", children: [_jsx(_components.span, { className: "token punctuation", children: "}" }), "\n"] }), _jsx(_components.span, { className: "code-line line-number", line: "12", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "13", children: [_jsx(_components.span, { className: "token keyword module", children: "export" }), " ", _jsx(_components.span, { className: "token keyword module", children: "default" }), " ", _jsx(_components.span, { className: "token maybe-class-name", children: "App" }), _jsx(_components.span, { className: "token punctuation", children: ";" }), "\n"] })] }) }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Why we write this React code:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "import DrawingApp" }), " brings in your complete drawing application component"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "import './styles.css'" }), " includes all the styling for the application"] }), "\n", _jsx(_components.li, { children: "The App component serves as the root container for your drawing application" }), "\n", _jsx(_components.li, { children: "This demonstrates React's component composition pattern at the application level" }), "\n"] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "React Concept Applied" }), ": This shows how complex React applications are built by composing smaller, focused components into larger, more sophisticated applications."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Click \"Run\"" }), " to see your complete interactive drawing application! Test all features to ensure everything works together seamlessly."] }), "\n", _jsx(_components.h2, { children: "Congratulations!" }), "\n", _jsx(_components.p, { children: "You've successfully built a sophisticated interactive drawing application that demonstrates mastery of advanced React event handling concepts! You've applied complex React patterns that form the foundation of professional-quality interactive applications:" }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "React Concepts Mastered:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Complex Event Coordination" }), ": Coordinated mouse, touch, keyboard, and click events in a unified application"] }), "\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Advanced State Management" }), ": Managed interconnected state variables that drive the entire application"] }), "\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Multi-Component Architecture" }), ": Organized sophisticated functionality across focused, reusable components"] }), "\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Canvas Integration" }), ": Combined imperative canvas API with React's declarative patterns"] }), "\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Real-Time Interaction" }), ": Created smooth, responsive drawing with immediate visual feedback"] }), "\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Cross-Device Compatibility" }), ": Implemented touch and mouse support for universal device compatibility"] }), "\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Keyboard Accessibility" }), ": Added keyboard shortcuts that work seamlessly with other interaction methods"] }), "\n", _jsxs(_components.li, { children: ["✅ ", _jsx(_components.strong, { children: "Professional UX Patterns" }), ": Implemented confirmation dialogs, visual feedback, and intuitive interactions"] }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Real-World Applications:" }) }), "\n", _jsx(_components.p, { children: "Your drawing application demonstrates patterns used in:" }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Creative Software" }), ": Digital art tools, design applications, and collaborative drawing platforms"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Interactive Dashboards" }), ": Data visualization tools with user interaction and customization"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Educational Platforms" }), ": Interactive learning tools, virtual whiteboards, and training simulators"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "E-commerce Applications" }), ": Product customization tools and interactive product demonstrations"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Gaming Interfaces" }), ": Character customization, level editors, and interactive game elements"] }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Professional Development Skills:" }) }), "\n", _jsx(_components.p, { children: "You've learned industry-standard React practices:" }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Component Architecture" }), ": Clean separation of concerns across multiple focused components"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Event System Mastery" }), ": Sophisticated coordination of multiple event types in complex applications"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "State Management Expertise" }), ": Managing complex, interconnected state relationships"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Performance Awareness" }), ": Building responsive applications that handle intensive user interactions"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Accessibility Integration" }), ": Keyboard shortcuts and cross-device compatibility"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "User Experience Design" }), ": Professional visual feedback and intuitive interaction patterns"] }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Technical Achievements:" }) }), "\n", _jsx(_components.p, { children: "Your drawing application showcases advanced React capabilities:" }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Canvas Integration" }), ": Successfully combined imperative canvas API with React's declarative patterns"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Event Coordination" }), ": Seamlessly coordinated mouse, touch, keyboard, and click events"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "State Synchronization" }), ": Maintained consistent state across multiple components and interaction types"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Real-Time Performance" }), ": Created smooth, responsive drawing that feels natural and professional"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Cross-Platform Support" }), ": Built an application that works identically on desktop, tablet, and mobile"] }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "The Foundation You've Built:" }) }), "\n", _jsx(_components.p, { children: "Every advanced React concept builds on these event handling and state management fundamentals:" }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Real-Time Applications" }), ": Live collaboration, chat applications, and real-time data visualization"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Complex Forms" }), ": Multi-step forms, validation systems, and dynamic form generation"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Interactive Games" }), ": Browser-based games with complex user interactions and real-time updates"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Data Visualization" }), ": Interactive charts, graphs, and dashboard applications"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Enterprise Applications" }), ": Complex business applications with sophisticated user interfaces"] }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "What Makes This Special:" }) }), "\n", _jsx(_components.p, { children: "Your drawing application isn't just a learning exercise - it's a genuinely useful, professional-quality application that demonstrates the same patterns used in applications serving millions of users. The smooth drawing, responsive color selection, intuitive keyboard shortcuts, and cross-device compatibility showcase React's power for building sophisticated interactive experiences." }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Your React Journey:" }) }), "\n", _jsx(_components.p, { children: "You've now mastered the fundamental skills needed to build any interactive React application:" }), "\n", _jsxs(_components.ul, { children: ["\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Event Handling Expertise" }), ": You can coordinate any combination of user interactions"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "State Management Mastery" }), ": You can manage complex application state relationships"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Component Architecture Skills" }), ": You can organize sophisticated functionality cleanly"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Performance Awareness" }), ": You can build responsive, smooth user experiences"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.strong, { children: "Professional Patterns" }), ": You can apply industry-standard React development practices"] }), "\n"] }), "\n", _jsx(_components.p, { children: "The drawing application you've built contains the DNA of every interactive React application. When users draw smooth lines, select colors with immediate feedback, toggle modes with keyboard shortcuts, and experience consistent behavior across devices, they're experiencing the same React magic that powers the most sophisticated web applications in the world." }), "\n", _jsx(_components.p, { children: "You're now equipped with the advanced React skills needed to build professional-quality interactive applications. Whether you're creating creative tools, data visualization platforms, educational software, or enterprise applications, you have the foundation to build anything you can imagine." }), "\n", _jsx(_components.p, { children: "Welcome to the world of advanced React development - you're ready to create amazing interactive experiences that delight users and solve real-world problems!" })] }); } function MDXContent(props = {}) { const {wrapper: MDXLayout} = { ..._provideComponents(), ...props.components }; return MDXLayout ? _jsx(MDXLayout, { ...props, children: _jsx(_createMdxContent, { ...props }) }) : _createMdxContent(props); } return { default: MDXContent };