改变input[type=range]的样式 动态滑动

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>修改range</title>
    <style>
        .slider-1 {
            width: 600px;
            margin: 200px auto;
        }

        .slider-1 input[type=range] {
            -webkit-appearance: none;
            width: 600px;
            border-radius: 5px;
            background: -webkit-linear-gradient(#F5C057, #F5C057) no-repeat #E6E6E5;
            background-size: 50% 100%;
        }

        .slider-1 input[type=range]::-webkit-slider-thumb {
            -webkit-appearance: none;
        }

        .slider-1 input[type=range]::-webkit-slider-runnable-track {
            height: 10px;
            border-radius: 5px;
        }

        .slider-1 input[type=range]:focus {
            outline: none;
        }

        .slider-1 input[type=range]::-webkit-slider-thumb {
            -webkit-appearance: none;
            height: 20px;
            width: 2px;
            margin-top: 0px;
            background: #F7931E;
            cursor: pointer;
        }

        .slider-1 .s-mark {
            margin-top: 17px;
        }

        .slider-1 .s-mark span {
            font-size: 12px;
            color: #3E3A39;
            display: block;
            text-align: center;
        }

        .slider-1 .s-mark span:first-child {
            float: left;
        }

        .slider-1 .s-mark span:nth-child(2) {
            float: right;
        }
    </style>
</head>

<body>
    <div class="slider-1">
        <input type="range" name="rangeMolecular" id="" max="2000" min="0" step="100%" value="" oninput="mark(event)">
        <div class="s-mark">
            <span>0</span>
            <span>2000</span>
            <span>1000</span>
        </div>
    </div>
    <script src="https://cdn.bootcss.com/jquery/3.4.0/jquery.min.js"></script>
    <script>
        function mark() {
            event || (event = window.event);
            $(‘.slider-1 input[type=range]‘).val(event.target.value);
            var info = event.target.value / 2000 * 100;
            $(‘.slider-1 input[type=range]‘).css(‘background-size‘, info + ‘% 100%‘);
        }
    </script>
</body>

</html>

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