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@@ -0,0 +1,62 @@
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+<!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 http-equiv="X-UA-Compatible" content="IE=edge">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+<body>
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+ <div id="div1" class="content">hello</div>
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+ <div class="content">word</div>
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+ <ul id="ul1">
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+ <li>1</li>
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+ <li>2</li>
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+ <li>3</li>
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+ </ul>
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+ <ul id="ul2">
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+ <li>4</li>
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+ <li>5</li>
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+ <li>6</li>
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+ </ul>
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+ <script>
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+ // var div1 = document.getElementById('div1')
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+ // console.log(div1)
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+ // var div2 = document.getElementsByClassName('content')
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+ // console.log(div2)
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+ // var div3 = document.getElementsByTagName('div')
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+ // console.log(div3)
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+
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+ /*
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+ querySelector 获取元素
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+ 只获取第一个元素
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+ */
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+ // var div1 = document.querySelector('#div1')
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+ // console.log(div1)
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+ // var div2 = document.querySelector('.content')
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+ // console.log(div2)
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+ // var div3 = document.querySelector('div')
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+ // console.log(div3)
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+
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+ /*
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+ querySelectorAll 查找所有满足条件的元素
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+ 返回的是一个nodeList 类数组 不是真正的数组 不太具备数组的方法
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+ */
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+ var aLi = document.querySelectorAll('li')
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+ console.log(aLi)
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+ var a = []
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+ console.log(a)
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+
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+ for(var i=0;i<aLi.length;i++){
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+ aLi[i].onclick = function(){
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+ console.log(this.innerText)
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+ }
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+ }
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+
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+ var ul2 = document.querySelector('#ul2')
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+ console.log(ul2)
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+ var li1 = ul2.querySelectorAll('li')
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+ console.log(li1)
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+ </script>
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+</body>
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+</html>
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zsydgithub