JS实现进度条功能

作者： 作者的头像   Hxxj ,  2023-07-03 10:15:35 ,  所有人可见 ,  阅读 119

1


4947d1f7fb4ca8075fe84b77e0d4642.png 

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JS实现进度条功能</title>
    <style>
        #header {
            width: 400px;
            height: 50px;
            border: 3px solid red;
        }

        #inner {
            width: 0px;
            height: 50px;
            background-color: lightgreen;

            font-size: 30px;
            text-align: center;
        }

        #button {
            width: 70px;
            height: 40px;

            margin-top: 30px;
        }
    </style>

</head>

<body>
    <div id="header">
        <div id="inner">
            <span id="texter"></span>
            <span>%</span>
        </div>
    </div>

    <button id="button">加载</button>

    <script>
        let button = document.getElementById('button');
        let inner = document.getElementById('inner');
        let texter = document.getElementById('texter');

        let timer = null;

        button.onclick = function () {
            let width_values = 0;
            if (timer == null) {
                timer = setInterval(() => {
                    width_values += 80;
                    inner.style.width = width_values + 'px';

                    texter.innerText = Math.ceil(width_values / 400 * 100);
                    if (width_values >= 400) {
                        clearInterval(timer);
                    }
                }, 1000);
            }
        }
    </script>
</body>

</html>

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