lovecoding
/
Web1020


			
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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>
        .box div{
            width: 200px;
            height: 120px;
            background-color: #aaa;
            color: #fff;
            font-size: 40px;
            font-weight: bolder;
            text-align: center;
            line-height: 120px;
        }
        .box{
            display: flex;
        }
        .box .active{
            background-color: #111;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="tab-btn active">first</div>
        <div class="tab-btn">second</div>
        <div class="tab-btn">third</div>
    </div>
    <script>
        let tabBtns = document.querySelectorAll('.tab-btn');
        let hashArr = ["first","second","third"];
        tabBtns.forEach((item,index)=>{
            item.onclick = function(){
                // 管理选中状态
                // tabBtns.forEach((item)=>{
                //     item.classList.remove("active");
                // });
                // this.classList.add("active");
                // 管理hash
                location.hash = hashArr[index]
            }
        })

        // 监听hash变化
        window.onhashchange = function(){
            // 获取hash值
            let hashVal = location.hash.slice(1);
            // 根据hash值，管理选中状态
            // 获取hash值对应的索引 
            // let index = hashArr.indexOf(hashVal);
            let index = hashArr.findIndex((item)=>{
                // if(item == hashVal){
                //     return true;
                // }
                return item == hashVal;
            })
            tabBtns.forEach((item)=>{
                item.classList.remove("active");
            });
            tabBtns[index].classList.add("active");
        }


    </script>
</body>
</html>