<!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>