76 lines
1.8 KiB
HTML
76 lines
1.8 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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<style>
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#container {
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width: 800px;
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height: 400px;
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margin: 10px auto;
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border: 1px solid black;
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overflow: hidden;
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}
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#buttons {
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width: 800px;
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margin: 10px auto;
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text-align: center;
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}
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#add, #fla {
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border: none;
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outline: none;
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width: 80px;
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height: 30px;
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background-color: red;
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color: white;
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font-size: 16px;
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cursor: pointer;
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}
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.small {
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width: 80px;
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height: 80px;
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float: left;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="buttons">
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<button id="add">添加</button>
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<button id="fla">闪烁</button>
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</div>
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<script src="js/mylib.js"></script>
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<script>
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var bigDiv = document.querySelector('#container');
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var addButton = document.querySelector('#add');
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addButton.addEventListener('click', function() {
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var smallDiv = document.createElement('div');
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smallDiv.className = 'small';
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// smallDiv.style.width = '80px';
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// smallDiv.style.height = '80px';
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// smallDiv.style.float = 'left';
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smallDiv.style.backgroundColor = randomColor();
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bigDiv.insertBefore(smallDiv, bigDiv.firstChild);
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});
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var flaButton = document.querySelector('#fla');
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var isFlashing = false;
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var timerId;
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flaButton.addEventListener('click', function(evt) {
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isFlashing = !isFlashing;
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if (isFlashing) {
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timerId = window.setInterval(function() {
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var divs = document.querySelectorAll('#container>div');
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for (var i = 0; i < divs.length; i += 1) {
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divs[i].style.backgroundColor = randomColor();
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}
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}, 200);
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flaButton.textContent = '暂停';
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} else {
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window.clearInterval(timerId);
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flaButton.textContent = '闪烁';
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}
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});
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</script>
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</body>
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</html>
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