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 data-val="first" class="tab-btn active">first</div>
        <div data-val="second" class="tab-btn">second</div>
        <div data-val="third" class="tab-btn">third</div>
    </div>
    <script>
        var tabBtns = document.querySelectorAll('.tab-btn');

        tabBtns.forEach((item)=>{
            item.onclick = function(){
                tabBtns.forEach((item)=>{
                    item.classList.remove("active");
                });
                this.classList.add("active");
                let thisVal = this.dataset.val;
                window.history.pushState(thisVal,"");
            }
        })

        window.onpopstate = function(){
            let thisState = window.history.state;
            tabBtns.forEach((item)=>{
                if(item.dataset.val == thisState){
                    tabBtns.forEach((item)=>{
                        item.classList.remove("active");
                    });
                    item.classList.add("active");
                }
            });
        }
    </script>
</body>

</html>