JavaScript\u304b\u3089\u753b\u9762\u306e\u8868\u793a\u3092\u64cd\u4f5c\u3067\u304d\u308b\u305f\u3081\u4fbf\u5229\u3060\u304c\u3068\u3066\u3082\u9045\u3044\u3067\u3059\u3002
React\u3067\u306f\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u304b\u3089\u4eee\u60f3DOM\u3092\u4f5c\u6210\u3057\u3001\u305d\u308c\u3092\u3082\u3068\u306bHTML\u306eDOM\u306b\u5185\u5bb9\u3092\u53cd\u6620\u3055\u305b\u308b\u305f\u3081\u901a\u5e38\u306b\u6bd4\u3079\u3066\u304b\u306a\u308a\u9ad8\u901f\u3067\u3059\u3002<\/p>\n\n\n\n
![\"\"](\"http:\/\/www.agile-software.site\/wp-content\/uploads\/2021\/08\/DOM.png\")
<\/figure>\n\n\n\n\u6e96\u5099<\/h2>\n\n\n\n
React\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u306fNode.js\u306e\u6e96\u5099\u304c\u5fc5\u8981\u3067\u3059\u3002
Node.js\u306fJavaScript\u306e\u5b9f\u884c\u74b0\u5883\u306e\u3053\u3068\u3067npm\u3068\u3044\u3046\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001JavaScript\u306e\u69d8\u3005\u306a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u7c21\u5358\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u305f\u308a\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\nhttp:\/\/www.agile-software.site\/2021\/05\/06\/node-js\/\n\n\n\n
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210<\/h2>\n\n\n\n
react_app\u3068\u3044\u3046\u30d5\u30a9\u30eb\u30c0\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u3053\u306e\u4e2d\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u5fc5\u8981\u306a\u3082\u306e\u304c\u3059\u3079\u3066\u7528\u610f\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
npx create-react-app react_app<\/code><\/pre><\/div>\n\n\n\n\u30b3\u30de\u30f3\u30c9<\/div>\n- npm start:\u958b\u767a\u7528\u306e\u30b5\u30fc\u30d0\u30fc\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f7f\u3063\u3066\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/li>
- npm run build:\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d3\u30eb\u30c9\u3092\u884c\u3044\u307e\u3059\u3002\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\u304b\u3089Web\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u3066\u5229\u7528\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u985e\u3092\u751f\u6210\u3059\u308b\u4f5c\u696d\u3067\u3059\u3002<\/li>
- <\/li><\/ul>\n<\/div>\n\n\n\n<\/i><\/div>\n
\u30d3\u30eb\u30c9\u304c\u5b8c\u4e86\u3059\u308b\u3068\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d5\u30a9\u30eb\u30c0\u306e\u4e2d\u306b\u300cbuild\u300d\u3068\u3044\u3046\u30d5\u30a9\u30eb\u30c0\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5168\u4f53\u306b\u6bd4\u3079\u308c\u3070\u975e\u5e38\u306b\u5c0f\u3055\u3044\u30b5\u30a4\u30ba\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n
\u4f5c\u6210\u3057\u305freact_app\u30d5\u30a9\u30eb\u30c0\u306b\u79fb\u52d5\u3057\u3066\u4e0b\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304c\u5b9f\u884c\u3055\u308cWeb\u30d6\u30e9\u30a6\u30b6\u3067\u30a2\u30d7\u30ea\u306e\u753b\u9762\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
npm start<\/code><\/pre><\/div>\n\n\n\n![\"\"](\"http:\/\/www.agile-software.site\/wp-content\/uploads\/2021\/05\/react_start-1024x565.png\")
<\/figure>\n\n\n\n\u30d5\u30a9\u30eb\u30c0\u69cb\u6210<\/h2>\n\n\n\n
\u4f5c\u6210\u3057\u305f\u30d5\u30a9\u30eb\u30c0\u306e\u4e2d\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
node_modules<\/h3>\n\n\n\n
npm\u3067\u7ba1\u7406\u3055\u308c\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u985e\u304c\u307e\u3068\u3081\u3066\u3042\u308b\u3002<\/p>\n\n\n\n
public<\/h3>\n\n\n\n
index.html\u306b\u304a\u3051\u308b<div>\u30bf\u30b0\u3067\u56f2\u307e\u308c\u305froot\u3068src\u306b\u304a\u3051\u308bindex.js\u306eroot\u304c\u7d10\u3065\u3051\u3089\u308c\u3066\u304a\u308a\u3001App\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n
<title>React App<\/title>\n <\/head>\n <body>\n <noscript>You need to enable JavaScript to run this app.<\/noscript>\n <div id="root"><\/div><\/code><\/pre><\/div>\n\n\n\npublic<\/div>\npublic\u30d5\u30a9\u30eb\u30c0\u306b\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u5229\u7528\u3059\u308bimage\u3084stylesheet\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u914d\u7f6e\u3057\u307e\u3059\u3002<\/p>\n\n\n\nindex.html<\/td> <\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n\nsrc<\/h3>\n\n\n\nsrc<\/div>\nsrc\u30d5\u30a9\u30eb\u30c0\u306b\u306fReact\u3067\u4f5c\u6210\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u306a\u3069\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u8a18\u8ff0\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\nindex.js<\/td> <\/td><\/tr> index.css<\/td> <\/td><\/tr> APP.js<\/td> <\/td><\/tr> App.css<\/td> <\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n\nimport\u6587\u306b\u3088\u3063\u3066\u5916\u90e8\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u3053\u3068\u3067\u305d\u3053\u306b\u3042\u308b\u6a5f\u80fd\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
index.js\u3067\u306fReactDOM.render\u3067App\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092id=”root”\u306b\u7d44\u307f\u8fbc\u3093\u3067\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
App\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306fApp.js\u3068\u7d10\u3065\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
import React from 'react';\nimport ReactDOM from 'react-dom';\nimport '.\/index.css';\nimport App from '.\/App';\nimport reportWebVitals from '.\/reportWebVitals';\n\nReactDOM.render(\n <React.StrictMode>\n <App \/>\n <\/React.StrictMode>,\n document.getElementById('root')\n);\n\nreportWebVitals();<\/code><\/pre><\/div>\n\n\n\nimport '.\/App.css';\nimport MemoPage from '.\/memo\/MemoPage';\n\nfunction App() {\n render() {\n return (\n <div className="App">\n <header className="App-header">\n <img src={logo} className="App-logo" alt="logo" \/>\n <p>\n Edit <code>src\/App.js<\/code> and save to reload.\n <\/p>\n <a\n className="App-link"\n href="https:\/\/reactjs.org"\n target="_blank"\n rel="noopener noreferrer"\n >\n Learn React\n <\/a>\n <\/header>\n <\/div>\n );\n }\n}\n\nexport default App;\n<\/code><\/pre><\/div>\n\n\n\ncomponent\u30d5\u30a9\u30eb\u30c0\u306e\u4f5c\u6210<\/h2>\n\n\n\n
src\u30d5\u30a9\u30eb\u30c0\u306e\u4e0b\u306bcomponent\u30d5\u30a9\u30eb\u30c0\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002
component\u30d5\u30a9\u30eb\u30c0\u306e\u76f4\u4e0b\u306bBasic1.js\u30d5\u30a9\u30eb\u30c0\u3092\u4f5c\u6210\u3057\u3066<div>\u30bf\u30b0\u5185\u306b\u8868\u793a\u3057\u305f\u3044\u5185\u5bb9\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
import React from 'react'\n\nconst Basic1 = () => {\n return (\n <div>\n \n <\/div>\n )\n}\n\nexport default Basic1<\/code><\/pre><\/div>\n\n\n\n\u4f5c\u6210\u3057\u305fBasic1.js\u3092APP.js\u3067\u8aad\u307f\u8fbc\u307e\u305b\u307e\u3059\u3002<\/p>\n\n\n\n
import '.\/App.css';\nimport MemoPage from '.\/memo\/MemoPage';\n\nfunction App() {\n render() {\n return (\n <div className="App">\n <header className="App-header">\n <img src={logo} className="App-logo" alt="logo" \/>\n <p>\n Edit <code>src\/App.js<\/code> and save to reload.\n <\/p>\n <a\n className="App-link"\n href="https:\/\/reactjs.org"\n target="_blank"\n rel="noopener noreferrer"\n >\n Learn React\n <\/a>\n <\/header>\n <\/div>\n );\n }\n}\n\nexport default App;\n<\/code><\/pre><\/div>\n\n\n\n\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d3\u30eb\u30c9<\/h2>\n\n\n\n
\u516c\u958b\u3059\u308bWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u4f5c\u696d\u3092\u30d3\u30eb\u30c9\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
npm run build<\/code><\/pre><\/div>\n\n\n\n\u30d3\u30eb\u30c9\u304c\u5b8c\u4e86\u3059\u308b\u3068\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30d5\u30a9\u30eb\u30c0\u306e\u4e2d\u306bbuild\u3068\u3044\u3046\u30d5\u30a9\u30eb\u30c0\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002
\u3053\u306e\u30d5\u30a9\u30eb\u30c0\u3092Web\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308c\u3070\u516c\u958b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
React Developer Tool<\/h2>\n\n\n\n