效果图如下:
代码如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="box"></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 src="https://cdn.bootcss.com/babel-standalone/7.0.0-beta.3/babel.js"></script>
<script type="text/babel">
const { useState } = React
const useRandomColor = (initColor) => {
const [color, setColor] = useState(initColor)
const handleRandom = () => {
//随机颜色
const randomColor = '#' + Math.random().toString(16).slice(2,8)
setColor(randomColor)
}
return [color, handleRandom]
}
function Com1() {
const [color, handleRandom] = useRandomColor('red')
return (
<div style={{backgroundColor:color, padding:50, textAlign:'center'}}>
<button onClick={handleRandom}>点击换色</button>
</div>
)
}
function Com2() {
const [color, handleRandom] = useRandomColor('green')
const handleClick = () => {
setInterval(handleRandom, 1000);
}
return (
<div style={{backgroundColor:color, padding:50, textAlign:'center'}}>
<button onClick={handleClick}>点击换色</button>
</div>
)
}
ReactDOM.render( <div><Com1/><Com2/></div>, document.getElementById('box'))
</script>
</body>
</html>
