lovecoding
/
W260426


			
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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>
        .progress-content {
            width: 500px;
            height: 80px;
            border: 5px solid black;
            border-radius: 10px;
            position: relative;
            overflow: hidden;
        }

        .progress-content .progress-bg {
            width: 0;
            height: 80px;
            background-color: orange;
        }

        .progress-num {
            color: #999;
            font-size: 40px;
            font-weight: bold;
            position: absolute;
            top: 0;
            left: 20px;
            height: 80px;
            line-height: 80px;
        }
    </style>
</head>

<body>
    <div class="progress-content">
        <div class="progress-bg"></div>
        <div class="progress-num">
            0%
        </div>
    </div>
    <button>开始</button>
    <script>
        // 获取元素
        var progressNum = document.querySelector(".progress-num");
        var progressBg = document.querySelector(".progress-bg");
        var btn = document.querySelector("button");
        var timer = 0;
        // 按钮绑定事件
        btn.onclick = function () {
            var num = 0;
            // 进度条动画
            timer = setInterval(function () {
                if (num >= 100) {
                    clearInterval(timer);
                } else {
                    num++;
                    progressBg.style.width = num + "%";
                    progressNum.innerText = num + "%";
                }
            }, 16)
        }


    </script>
</body>

</html>