21 lines
500 B
HTML
21 lines
500 B
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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<title>Document</title>
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</head>
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<body>
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<script type="text/javascript">
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window.onload = function(){
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document.getElementById('btn').onclick = function(){
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console.log('hahahah')
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}
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}
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//浏览器从上到下执行
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//加载事件 当整个页面加载完成之后在执行
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//onunloda 在页面关闭之后
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//onbeforeunload 在页面关闭之前
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</script>
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<input type="button" value="按钮" id="btn">
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</body>
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</html> |