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历届学生/font-end-nine/项目练习/学生项目/刘正阳/每日练习/6.15 js练习/tab.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+    <style>
+        ul,li {
+            margin: 0;
+            padding: 0;
+            list-style: none;
+        }
+
+        .title {
+            display: flex;
+        }
+        .title li {
+            margin-right: 10px;
+        }
+
+        .title .active {
+            color: red;
+        }
+
+        .content li {
+            display: none;
+        }
+
+        .content .active {
+            display: block;
+        }
+
+    </style>
+</head>
+<body>
+    <ul class="tittle">
+        <li class="active">首页</li>
+        <li>游戏</li>
+        <li>电影</li>
+        <li>体育</li>
+    </ul>
+
+    <ul class="content">
+        <li class="active">首页 的内容</li>
+        <li>游戏 的内容</li>
+        <li>电影 的内容</li>
+        <li>体育 的内容</li>
+    </ul>
+</body>
+
+<script>
+    var tittleLi = _("tittle li"),contentLi = _("content li")
+
+    tittleLi.forEach(function(item, index) {
+        item.className = ""
+        contentLi[index].className = ""
+    })
+
+    v.className = "active"
+    contentLi[i].className = "active"
+
+    function $(className) {
+        return document.querySelector(className)
+  }
+  function _(className) {
+        return document.querySelectorAll(className)
+  }
+</script>
+</html>