Custom range slider

bradtraversy · Oct 23, 2020 · c35276c · c35276c
1 parent 01ae675
commit c35276c
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diff --git a/custom-range-slider/.vscode/settings.json b/custom-range-slider/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "liveServer.settings.port": 5501
+}
diff --git a/custom-range-slider/index.html b/custom-range-slider/index.html
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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" />
+    <link rel="stylesheet" href="style.css" />
+    <title>Custom Range Slider</title>
+  </head>
+  <body>
+    <h2>Custom Range Slider</h2>
+    <div class="range-container">
+      <input type="range" id="range" min="0" max="100">
+      <label for="range">50</label>
+    </div>
+
+    <script src="script.js"></script>
+  </body>
+</html>
diff --git a/custom-range-slider/script.js b/custom-range-slider/script.js
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+const range = document.getElementById('range')
+
+range.addEventListener('input', (e) => {
+    const value = +e.target.value
+    const label = e.target.nextElementSibling
+
+    const range_width = getComputedStyle(e.target).getPropertyValue('width')
+    const label_width = getComputedStyle(label).getPropertyValue('width')
+
+    const num_width = +range_width.substring(0, range_width.length - 2)
+    const num_label_width = +label_width.substring(0, label_width.length - 2)
+
+    const max = +e.target.max
+    const min = +e.target.min
+
+    const left = value * (num_width / max) - num_label_width / 2 + scale(value, min, max, 10, -10)
+
+    label.style.left = `${left}px`
+
+
+    label.innerHTML = value
+})
+
+// https://stackoverflow.com/questions/10756313/javascript-jquery-map-a-range-of-numbers-to-another-range-of-numbers
+const scale = (num, in_min, in_max, out_min, out_max) => {
+    return (num - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+  }
diff --git a/custom-range-slider/style.css b/custom-range-slider/style.css
@@ -0,0 +1,108 @@
+@import url('https://fonts.googleapis.com/css?family=Lato&display=swap');
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
+  font-family: 'Lato', sans-serif;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 100vh;
+  overflow: hidden;
+  margin: 0;
+}
+
+h2 {
+  position: absolute;
+  top: 10px;
+}
+
+.range-container {
+  position: relative;
+}
+
+input[type='range'] {
+  width: 300px;
+  margin: 18px 0;
+  -webkit-appearance: none;
+}
+
+input[type='range']:focus {
+  outline: none;
+}
+
+input[type='range'] + label {
+  background-color: #fff;
+  position: absolute;
+  top: -25px;
+  left: 110px;
+  width: 80px;
+  padding: 5px 0;
+  text-align: center;
+  border-radius: 4px;
+  box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
+}
+
+/* Chrome & Safari */
+input[type='range']::-webkit-slider-runnable-track {
+  background: purple;
+  border-radius: 4px;
+  width: 100%;
+  height: 10px;
+  cursor: pointer;
+}
+
+input[type='range']::-webkit-slider-thumb {
+  -webkit-appearance: none;
+  height: 24px;
+  width: 24px;
+  background: #fff;
+  border-radius: 50%;
+  border: 1px solid purple;
+  margin-top: -7px;
+  cursor: pointer;
+}
+
+/* Firefox */
+input[type='range']::-moz-range-track {
+  background: purple;
+  border-radius: 4px;
+  width: 100%;
+  height: 13px;
+  cursor: pointer;
+}
+
+input[type='range']::-moz-range-thumb {
+  -webkit-appearance: none;
+  height: 24px;
+  width: 24px;
+  background: #fff;
+  border-radius: 50%;
+  border: 1px solid purple;
+  margin-top: -7px;
+  cursor: pointer;
+}
+
+/* IE */
+input[type='range']::-ms-track {
+  background: purple;
+  border-radius: 4px;
+  width: 100%;
+  height: 13px;
+  cursor: pointer;
+}
+
+input[type='range']::-ms-thumb {
+  -webkit-appearance: none;
+  height: 24px;
+  width: 24px;
+  background: #fff;
+  border-radius: 50%;
+  border: 1px solid purple;
+  margin-top: -7px;
+  cursor: pointer;
+}