"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", 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: useEffect Fundamentals" }), "\n", _jsx(_components.p, { children: "Follow these step-by-step instructions to build your first React component using the useEffect hook. This exercise will reinforce the side effect concepts you learned in the lesson and guide you through creating a dynamic theme generator that demonstrates real-world useEffect applications." }), "\n", _jsx(_components.h2, { children: "Concept Reinforcement" }), "\n", _jsx(_components.p, { children: "Before we start coding, let's review the key React concepts you'll be applying in this exercise:" }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Side Effects and useEffect" }), ": You'll use the useEffect hook to perform a side effect - updating CSS custom properties to change the app's theme. This demonstrates how React components can interact with the browser environment beyond just rendering JSX."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Effect Dependencies" }), ": You'll learn to control when effects run by specifying dependencies. The effect will only run when specific state values change, showing React's optimization capabilities."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "State and Effect Integration" }), ": You'll see how useEffect works seamlessly with useState - when state changes, effects run automatically, creating a responsive user experience."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Component Architecture" }), ": You'll organize your code professionally by separating the TitleUpdater component into its own file with proper import/export syntax, following React best practices."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Real-Time Updates" }), ": You'll experience how useEffect enables real-time interactions between your React component and the browser environment, creating immediate visual feedback."] }), "\n", _jsx(_components.h2, { children: "The Challenge" }), "\n", _jsx(_components.p, { children: "Create a dynamic theme generator component that demonstrates useEffect fundamentals:" }), "\n", _jsxs(_components.ul, { children: ["\n", _jsx(_components.li, { children: "Input field for user name and dropdown for mood selection" }), "\n", _jsx(_components.li, { children: "Real-time color scheme changes as users interact with the form" }), "\n", _jsx(_components.li, { children: "Visual feedback showing the entire app's theme changing" }), "\n", _jsx(_components.li, { children: "Professional form styling with smooth color transitions" }), "\n", _jsx(_components.li, { children: "Proper useEffect implementation with correct dependencies" }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Success Criteria:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsx(_components.li, { children: "✅ Component uses useEffect to update CSS custom properties" }), "\n", _jsx(_components.li, { children: "✅ Effect runs only when name or mood changes (proper dependencies)" }), "\n", _jsx(_components.li, { children: "✅ App's color scheme changes in real-time as user interacts" }), "\n", _jsx(_components.li, { children: "✅ Form inputs are controlled components using useState" }), "\n", _jsx(_components.li, { children: "✅ Component is organized in separate files with proper imports" }), "\n", _jsx(_components.li, { children: "✅ Visual feedback shows dramatic color changes" }), "\n", _jsx(_components.li, { children: "✅ Professional appearance with smooth transitions" }), "\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 document title updater yourself! Use these React concepts you've learned:" }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "React Concepts to Use:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsx(_components.li, { children: "Functional components with JSX" }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "useState" }), " hook for managing form input state"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "useEffect" }), " hook for the side effect (updating CSS custom properties)"] }), "\n", _jsx(_components.li, { children: "Effect dependencies to control when the effect runs" }), "\n", _jsx(_components.li, { children: "Controlled components for form inputs" }), "\n", _jsx(_components.li, { children: "Component import/export with ES6 modules" }), "\n"] }), "\n", _jsx(_components.p, { children: _jsx(_components.strong, { children: "Conceptual Hints:" }) }), "\n", _jsxs(_components.ul, { children: ["\n", _jsx(_components.li, { children: "Think about what data needs to change over time (that's your state)" }), "\n", _jsx(_components.li, { children: "Consider what side effect you need to perform (updating CSS custom properties)" }), "\n", _jsx(_components.li, { children: "Remember that useEffect runs after the component renders" }), "\n", _jsx(_components.li, { children: "Use the dependency array to control when the effect runs" }), "\n", _jsx(_components.li, { children: "The effect should only run when the name or mood changes" }), "\n"] }), "\n", _jsx(_components.p, { children: "Try building it yourself first - it's okay if you get stuck! The step-by-step guide below will help you understand each React concept as you implement it." }), "\n", _jsx(_components.hr, {}), "\n", _jsx(_components.h2, { children: "Step-by-Step React Implementation Guide" }), "\n", _jsx(_components.p, { children: "If you need help or want to understand each React concept in detail, follow these steps:" }), "\n", _jsx(_components.h3, { children: "Step 1: Create the ThemeGenerator Component File" }), "\n", _jsxs(_components.p, { children: ["Create a new file called ", _jsx(_components.code, { children: "ThemeGenerator.js" }), " and set up the basic React component structure. This demonstrates React's component-based architecture and professional file organization."] }), "\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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[_jsx(_components.code, { children: "className" }), " attributes connect to CSS classes for professional styling"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "export default ThemeGenerator" }), " makes this component available for import in other files"] }), "\n"] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "React Concept Applied" }), ": This demonstrates component-based architecture - a self-contained piece of functionality that can be reused anywhere in your application."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Click \"Run\"" }), " to see your basic theme generator component render! Notice how the CSS styling is automatically applied to create a professional appearance."] }), "\n", _jsx(_components.h3, { children: "Step 2: Add State for Form Data" }), "\n", _jsxs(_components.p, { children: ["Import the ", _jsx(_components.code, { children: "useState" }), " hook and add state to manage the form input values. This is the foundation for creating controlled components that React can manage."] }), "\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: "}" })] }), " ", _jsx(_components.span, { className: "token keyword module", children: "from" }), " ", _jsx(_components.span, { className: "token string", children: "'react'" }), _jsx(_components.span, { 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_jsx(_components.span, { className: "code-line line-number", line: "19", children: "\n" }), _jsxs(_components.span, { className: "code-line line-number", line: "20", 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: "ThemeGenerator" }), _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: "{ useState }" }), " imports the useState hook from React"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "useState('React Developer')" }), " creates state with a meaningful default value"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "const [name, setName]" }), " uses array destructuring to get the current value and update function"] }), "\n", _jsxs(_components.li, { children: [_jsx(_components.code, { children: "{mood} mode for {name}" }), " uses JSX expressions to display the current state values dynamically"] }), "\n", _jsx(_components.li, { children: "Default values provide a good first impression and show the expected format" }), "\n"] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "React Concept Applied" }), ": This demonstrates React state management - data that can change over time and automatically triggers re-renders when updated."] }), "\n", _jsxs(_components.p, { children: [_jsx(_components.strong, { children: "Click \"Run\"" }), " to see your component display the current theme information! The preview now shows what theme will be applied."] }), "\n", _jsx(_components.h3, { children: "Step 3: Add the useEffect Hook for Theme Updates" }), "\n", _jsx(_components.p, { children: "Import and use the useEffect hook to perform the side effect of updating CSS custom properties. 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