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04-React.md

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install React

yarn add react react-dom

entry

create src folder mkdir src

create src/App.jsx

import React from "react";

function App() {
  return <div>Hello World</div>;
}

export default App;

create src/index.jsx

import React from "react";
import { render } from "react-dom";
import App from "./App";

render(<App />, document.getElementById("root"));

create src/index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Title</title>
  </head>
  <body>
    <div id="root"></div>
  </body>
</html>

develope the app

run command yarn start

build the app

run command yarn build