Custom Range Slider using HTML CSS JavaScript

project demo

html code

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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Dynamic Gradient Range Slider</title>
    
</head>

<body>

    <input type="range" value="50" max="100" id="slider"> <script data-no-optimize="1">window.lazyLoadOptions=Object.assign({},{threshold:300},window.lazyLoadOptions||{});!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function o(t){return e({},at,t)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,vt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,vt,e)}function i(t){return s(t,null),0}function r(t){return null===c(t)}function u(t){return c(t)===_t}function d(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function f(t,e){et?t.classList.add(e):t.className+=(t.className?" 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d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script><script data-no-optimize="1">var 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</html>

css code

				
					body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #090979;
    background: linear-gradient(90deg, rgb(0, 157, 255) 0%, rgba(0, 212, 255, 1) 100%);
    font-family: sans-serif;
}

input[type=range] {
    width: 320px;
    height: 10px;
    appearance: none;
    border-radius: 5px;
    outline: none;
    cursor: pointer;
    background: linear-gradient(90deg, #ff00cc 50%, #333 50%);
    transition: background 0.3s;
}

/* Chrome/Edge Thumb */
input[type=range]::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #ff2faf, #0030b4);
    border-radius: 50%;
    box-shadow: 0 0 12px rgba(255, 0, 200, 0.7);
    transition: transform 0.2s, box-shadow 0.3s;
}

/* Firefox Thumb */
input[type=range]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #ff00cc, #3333ff);
    border: none;
    border-radius: 50%;
    box-shadow: 0 0 12px rgba(255, 0, 200, 0.7);
    transition: transform 0.2s, box-shadow 0.3s;
}

/* Hover & Active Effects */
input[type=range]:hover::-webkit-slider-thumb,
input[type=range]:hover::-moz-range-thumb {
    transform: scale(1.1);
    box-shadow: 0 0 18px rgba(255, 0, 200, 0.9);
}

input[type=range]:active::-webkit-slider-thumb,
input[type=range]:active::-moz-range-thumb {
    transform: scale(1.2);
}

javascript code

				
					const slider = document.getElementById("slider");

function updateGradient() {
  const val = (slider.value / slider.max) * 100;
  slider.style.background = `linear-gradient(90deg, #ff00cc ${val}%, rgba(234, 234, 234, 0.941) ${val}%)`;
}

slider.addEventListener("input", updateGradient);
updateGradient(); // initialize on load