39 lines
1.1 KiB
HTML
39 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="X-UA-Compatible" content="ie=edge">
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<title>Document</title>
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<style>
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div {
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width: 100px;
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height: 100px;
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background: hotpink;
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border-radius: 50px;
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}
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</style>
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</head>
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<body>
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<input type="button" value="变宽" id="button">
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<div id="dv"></div>
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<script type="text/javascript">
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window.onload = function() {
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var timer;
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document.getElementById('button').onclick = function() {
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//清空计时器
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clearInterval(timer);
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//div的宽度渐渐增加
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var w = 100;
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timer = setInterval(function() {
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w += 1;
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document.getElementById('dv').style.width = w + 'px';
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if(w >= 400) {
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clearInterval(timer);
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}
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}, 10)
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}
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}
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</script>
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</body>
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</html> |