blah/javascript_react.html at master · Riceyo/blah · GitHub

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<html>
	<head>
	</head>
	<body>
		<div id="root"></div>
		<div id="counterButton"></div>
		<div id="multiRender"></div>
		<div id="app"></div>
		<br />
		<div id="countApp"></div>
		<br />
		<div id="rerenderReact"></div>
		<div id="rerenderNonReact"></div>
		<br />
		<div id="propsTest"></div>
		<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
		<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
		<script crossorigin src="https://unpkg.com/babel-standalone@6.26.0/babel.js"></script>
		<script type="text/babel">


			function Hello() {
				return <div>Hello!</div>; // jsx - React.createElement() call
			}

			ReactDOM.render(
				<Hello /> // component to render
				,document.getElementById('root') // where to render
			);


			function CounterButton() {
				const [counter, setCounter] = React.useState(0); // hook
				return <button onClick={() => setCounter(counter + 1)}>{counter}</button>; // arrow function
			}

			ReactDOM.render(
				<CounterButton />
				,document.getElementById('counterButton')
			);


			ReactDOM.render(
				<React.Fragment>
					<Hello />
					<CounterButton />
				</React.Fragment>
				,document.getElementById('multiRender') // render multiple components in single render
			);


			function App() { // put all components to render in this function
				return (
					<React.Fragment>
						<Hello />
						<CounterButton />
					</React.Fragment>
				)
			}

			ReactDOM.render(
				<App />
				,document.getElementById('app') // render function that returns all components to render
			);


			function CounterButtonDisplay(props) {
				return (
					<div>
						<button onClick={props.click1}> + 1</button>
						<button onClick={props.click10}> + 10</button>
					</div>
				);
			}

			function Display(props) {
				return (
					<div>{props.number}</div> // display "number" prop
				);
			}

			function CountApp() {
				const [counter, setCounter] = React.useState(1337); // counter displayed by "number" prop
				const plusOne = () => setCounter(counter + 1); // called by "click1" prop
				const plusTen = () => setCounter(counter + 10); // called by "click10" prop
				return (
					<div>
						<CounterButtonDisplay click1={plusOne} click10={plusTen} />
						<Display number={counter} />
					</div>
				);
			}

			ReactDOM.render(
				<CountApp />
				,document.getElementById('countApp')
			);


			function RenderDate() {
				return new Date().toLocaleTimeString();
			}

			function RenderInput() {
				return <input type="text" placeholder="react only re-rendering date" />
			}

			const rerender = () => {

				ReactDOM.render(
					<div>
						<RenderDate />
						<br />
						<RenderInput />
					</div>
					,document.getElementById('rerenderReact')
				)

				document.getElementById('rerenderNonReact').innerHTML = "<div><input placeholder='non-react re-rendering all' /></div>";

			}

			setInterval(rerender, 1000);


			function PropsTestFuncDisplay(props) {
				return (
					<div>
						{props.blah1}
						<br />
						{props.blah2}
						<br />
						{props.blah3}
						<br />
						{props.displayDate}
						<br />
						{props.constValue}
					</div>
				);
			}

			function PropsTestFunc() {
				const someString = "lardydah";
				return (
					<div>
						<PropsTestFuncDisplay
							blah1={"prop1"}
							blah2={"prop2"}
							blah3={"prop3"}
							displayDate={Date()}
							constValue={someString}
						/>
					</div>
				);
			}

			ReactDOM.render(
				<PropsTestFunc />
				,document.getElementById('propsTest')
			);


		</script>
	</body>
</html>