lovecoding
/
VIP32


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        .box {
            width: 200px;
            height: 200px;
            background: #00f;
        }
        button {
            margin-top: 40px;
        }
        .vase {
            width: 50px;
            height: 35px;
            text-align: center;
            line-height: 35px;
            background: purple;
            color: #fff;
            margin-top: 40px;
            margin-left: 20px;
        }
    </style>
</head>
<body>
    <div class="box"></div>
    <button>改变颜色</button>
    <ul>
        <li>12</li>
        <li>34</li>
        <li>56</li>
        <li>78</li>
    </ul>
    <div class="vase">改变</div>
    <script>
        var btn = document.querySelector("button");
        var box = document.querySelector(".box");
        var lis = document.querySelectorAll("ul li");
        var vase = document.querySelector(".vase");
        btn.onclick = function() {
            box.style.marginLeft = 100 + 'px';
            box.style.background = 'red';
        }
        vase.onclick = function() {
            lis[0].style.background = 'red';
        }
    </script>
</body>
</html>