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Animating range ticks when moving range thumb

由 戏子无情 提交于 2020-07-21 04:38:11

问题


I have custom input type="range", span that shows range's value and div with many p that act as ticks. I used custom div for ticks because appearance: none on the range hides the ticks. I am generating the ticks with DOM.

I've used slider thumb to act as a curved border and make the span with range value to act as the circle thumb. It cannot be curved where it connects with the slider but still works alright.

I want to achieve to animate the ticks to go over the thumb where it's placed. This is expected result:

This is my code and CodePen

// Creating ticks here to prevent long HTML code
var i;
const tickContainer = document.getElementById('tickContainer');

for (i = 1; i <= 100; i++) {
    var p = document.createElement('P');
    tickContainer.appendChild(p);
}

// Position of span that shows range value
const range = document.getElementById('range');
const rangeV = document.getElementById('rangeValue');
const setValue = () => {
  const newValue = Number((range.value - range.min) * 100 / (range.max - range.min));
  const newPosition = 35 - (newValue * 0.7);
  rangeV.style.left = `calc(${newValue}% + (${newPosition}px))`;

  rangeV.innerHTML = `<span>${range.value}%</span>`;
};

// Initialize setValue onload and oninput
document.addEventListener("DOMContentLoaded", setValue);
range.addEventListener('input', setValue);
body {
  font-family: Arial;
  margin: 50px;
}

.range-wrap {
  position: relative;
}

/* Styling of ticks (lines) over the range */
.ticks {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  position: absolute;
  width: 100%;
}

.ticks p {
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  text-align: center;
  width: 1px;
  background: #D3D3D3;
  height: 10px;
  line-height: 40px;
  margin: 0 0 20px 0;
}

/* Styling the range */
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  margin: 20px 0;
  width: 100%;
  height: 4px;
  background-image: linear-gradient(125deg, #e0e0e0 34%, #0008d7 100%);
  outline: none;
}

input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  border-radius: 25px;
}

input[type=range]::-moz-range-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  border-radius: 25px;
}

input[type=range]::-webkit-slider-thumb {
  height: 70px;
  width: 70px;
  -webkit-transform: translateY(-44.3%) rotate(-45deg);
          transform: translateY(-44.3%) rotate(-45deg);
  -webkit-appearance: none;
  appearance: none;
  background: #ddd;
  border: 3px solid transparent;
  border-color: transparent transparent #fff #fff;
  border-radius: 50%;
  cursor: pointer;
  background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, #0008d7 100%);
  background-attachment: fixed, fixed;
  background-clip: padding-box, border-box;
}

input[type=range]::-moz-range-thumb {
  height: 70px;
  width: 70px;
  transform: rotate(45de);
  appearance: none;
  background: #ddd;
  border: 3px solid transparent;

  border-radius: 50%;
  cursor: pointer;
  background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, #0008d7 100%);
  background-attachment: fixed, fixed;
  background-clip: padding-box, border-box;
}

/* Range value (label) inside of range thumb */
.range-value {
  position: absolute;
  top: -50%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  z-index: 99;
  user-select: none;
  select: none;
  pointer-events: none;
}

.range-value span {
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  color: #fff;
  background: #0008d7;
  font-size: 18px;
  display: block;
  position: absolute;
  top: 20px;
  border-radius: 50%;
  user-select: none;
  select: none;
  pointer-events: none;
  z-index: 100;
}
<div class="range-wrap">
  <!-- Ticks (lines) over slider. -->
  <div class="ticks" id="tickContainer">
  </div>
  <!-- Range value inside of range thumb -->
  <div class="range-value" id="rangeValue"></div>
  <!-- Range itself -->
  <input id="range" type="range" min="1" max="100" value="1" step="1">
</div>

回答1:


Here is an idea using mask. The trick is to create the ticks using background (to avoid a lot of element) then I use mask to create the curve shape around the thumb. The mask is composed by a radial-gradient (the circular shape that will move based on the thumb value) and a linear-gradient to create the base

// Creating ticks here to prevent long HTML code
var i;
const tickContainer = document.getElementById('tickContainer');

// Position of span that shows range value - not important
const range = document.getElementById('range');
const rangeV = document.getElementById('rangeValue');
const setValue = () => {
  const newValue = Number((range.value - range.min) * 100 / (range.max - range.min));
  const newPosition = 35 - (newValue * 0.7);
  rangeV.style.left = `calc(${newValue}% + (${newPosition}px))`;
  tickContainer.style.setProperty('--p', `calc(${newValue}%)`);
  rangeV.innerHTML = `<span>${range.value}%</span>`;
};

// Initialize setValue onload and oninput
document.addEventListener("DOMContentLoaded", setValue);
range.addEventListener('input', setValue);
body {
  font-family: Arial;
  margin: 50px;
}

.range-wrap {
  position: relative;
}


/* Styling of ticks (lines) over the range */

.ticks {
  position: absolute;
  left: -15px;
  right: -15px;
  padding:0 15px;
  top: -25px;
  height: 45px;
  background: repeating-linear-gradient(to right, #D3D3D3 0 2px, transparent 2px 6px);
  background-clip:content-box;
  -webkit-mask: 
    radial-gradient(farthest-side at bottom, #fff 98%, transparent) var(--p, 0) 0px/100px 50px, 
    linear-gradient(#fff, #fff) bottom/100% 10px;
  -webkit-mask-repeat: no-repeat;
  mask: 
    radial-gradient(farthest-side at bottom, #fff 98%, transparent) var(--p, 0) 0px/100px 50px, 
    linear-gradient(#fff, #fff) bottom/100% 10px;
  mask-repeat: no-repeat;
}


/* Styling of the range */

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  margin: 20px 0;
  width: 100%;
  background-image: linear-gradient(125deg, #e0e0e0 34%, #0008d7 100%);
  outline: none;
}

input[type=range]:focus {
  outline: none
}

input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  border-radius: 25px;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  height: 70px;
  width: 70px;
  cursor: pointer;
  background: #ddd;
  /* Thumb gradient as slider */
  background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, #0008d7 100%);
  background-attachment: fixed, fixed;
  background-clip: padding-box, border-box;
  /* Hide bottom half of the circle with white color - as background is */
  border: 3px solid transparent;
  border-color: transparent transparent #fff #fff;
  border-radius: 50%;
  transform: translateY(-44.3%) rotate(-45deg);
}


/* Range value (label) inside of range thumb */

.range-value {
  position: absolute;
  top: -50%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.range-value span {
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  color: #fff;
  background: #0008d7;
  font-size: 18px;
  display: block;
  position: absolute;
  top: 20px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 99;
}
<div class="range-wrap">
  <!-- Ticks (lines) over slider. -->
  <div class="ticks" id="tickContainer">
  </div>
  <!-- Range value inside of range thumb -->
  <div class="range-value" id="rangeValue"></div>
  <!-- Range itself -->
  <input id="range" type="range" min="1" max="100" value="1" step="1">
</div>

<p>If slider is not working propertly, your browser doesn't support <code>-webkit</code>. Visit <a href="https://codepen.io/Vepth/pen/zYrPZqv">CodePen</a> with full browser support</p>

To have the gap you can update the mask like below:

// Creating ticks here to prevent long HTML code
var i;
const tickContainer = document.getElementById('tickContainer');

// Position of span that shows range value - not important
const range = document.getElementById('range');
const rangeV = document.getElementById('rangeValue');
const setValue = () => {
  const newValue = Number((range.value - range.min) * 100 / (range.max - range.min));
  const newPosition = 35 - (newValue * 0.7);
  rangeV.style.left = `calc(${newValue}% + (${newPosition}px))`;
  tickContainer.style.setProperty('--p', `calc(${newValue}%)`);
  rangeV.innerHTML = `<span>${range.value}%</span>`;
};

// Initialize setValue onload and oninput
document.addEventListener("DOMContentLoaded", setValue);
range.addEventListener('input', setValue);
body {
  font-family: Arial;
  margin: 50px;
}

.range-wrap {
  position: relative;
}


/* Styling of ticks (lines) over the range */

.ticks {
  position: absolute;
  left: -15px;
  right: -15px;
  padding:0 15px;
  top: -30px;
  height: 45px;
  background: repeating-linear-gradient(to right, #D3D3D3 0 2px, transparent 2px 6px);
  background-clip:content-box;
  -webkit-mask: 
    radial-gradient(farthest-side at bottom,transparent 75%, #fff 76% 98%, transparent) 
      var(--p) 0px/100px 50px, 
    linear-gradient(#fff, #fff) var(--p) 100%/95px 10px,
    linear-gradient(#fff, #fff) bottom       /100% 10px;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-composite: source-over,destination-out;
  mask: 
    radial-gradient(farthest-side at bottom,transparent 75%, #fff 76% 98%, transparent) 
      var(--p) 0px/100px 50px, 
    linear-gradient(#fff, #fff) var(--p) 100%/95px 10px,
    linear-gradient(#fff, #fff) bottom       /100% 10px;
  mask-repeat: no-repeat;
  mask-composite: exclude;
  
}


/* Styling of the range */

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  margin: 20px 0;
  width: 100%;
  background-image: linear-gradient(125deg, #e0e0e0 34%, #0008d7 100%);
  outline: none;
}

input[type=range]:focus {
  outline: none
}

input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  border-radius: 25px;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  height: 70px;
  width: 70px;
  cursor: pointer;
  background: #ddd;
  /* Thumb gradient as slider */
  background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, #0008d7 100%);
  background-attachment: fixed, fixed;
  background-clip: padding-box, border-box;
  /* Hide bottom half of the circle with white color - as background is */
  border: 3px solid transparent;
  border-color: transparent transparent #fff #fff;
  border-radius: 50%;
  transform: translateY(-44.3%) rotate(-45deg);
}


/* Range value (label) inside of range thumb */

.range-value {
  position: absolute;
  top: -50%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.range-value span {
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  color: #fff;
  background: #0008d7;
  font-size: 18px;
  display: block;
  position: absolute;
  top: 20px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 99;
}
<div class="range-wrap">
  <!-- Ticks (lines) over slider. -->
  <div class="ticks" id="tickContainer">
  </div>
  <!-- Range value inside of range thumb -->
  <div class="range-value" id="rangeValue"></div>
  <!-- Range itself -->
  <input id="range" type="range" min="1" max="100" value="1" step="1">
</div>

<p>If slider is not working propertly, your browser doesn't support <code>-webkit</code>. Visit <a href="https://codepen.io/Vepth/pen/zYrPZqv">CodePen</a> with full browser support</p>

Full code for all the browsers:

// Creating ticks here to prevent long HTML code
var i;
const tickContainer = document.getElementById('tickContainer');

// Position of span that shows range value - not important
const range = document.getElementById('range');
const rangeV = document.getElementById('rangeValue');
const setValue = () => {
  const newValue = Number((range.value - range.min) * 100 / (range.max - range.min));
  const newPosition = 35 - (newValue * 0.7);
  rangeV.style.left = `calc(${newValue}% + (${newPosition}px))`;
  tickContainer.style.setProperty('--p', `calc(${newValue}%)`);
  rangeV.innerHTML = `<span>${range.value}%</span>`;
};

// Initialize setValue onload and oninput
document.addEventListener("DOMContentLoaded", setValue);
range.addEventListener('input', setValue);
body {
  font-family: Arial;
  margin: 50px;
}

.range-wrap {
  position: relative;
}

/* Styling of ticks (lines) over the range */
.ticks {
  position: absolute;
  left: -15px;
  right: -15px;
  padding:0 15px;
  top: -30px;
  height: 45px;
  background: repeating-linear-gradient(to right, #D3D3D3 0 2px, transparent 2px 6px);
  background-clip:content-box;
  -webkit-mask: 
    radial-gradient(farthest-side at bottom,transparent 75%, #fff 76% 98%, transparent) 
      var(--p) 0px/100px 50px, 
    linear-gradient(#fff, #fff) var(--p) 100%/95px 10px,
    linear-gradient(#fff, #fff) bottom       /100% 10px;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-composite: source-over,destination-out;
  mask: 
    radial-gradient(farthest-side at bottom,transparent 75%, #fff 76% 98%, transparent) 
      var(--p) 0px/100px 50px, 
    linear-gradient(#fff, #fff) var(--p) 100%/95px 10px,
    linear-gradient(#fff, #fff) bottom       /100% 10px;
  mask-repeat: no-repeat;
  mask-composite: exclude;
}

/* Styling the range */
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  margin: 20px 0;
  width: 100%;
  height: 4px;
  background-image: linear-gradient(125deg, #e0e0e0 34%, #0008d7 100%);
  outline: none;
}

input[type=range]::-webkit-slider-runnable-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  border-radius: 25px;
}

input[type=range]::-moz-range-track {
  width: 100%;
  height: 4px;
  cursor: pointer;
  border-radius: 25px;
}

input[type=range]::-webkit-slider-thumb {
  height: 70px;
  width: 70px;
  -webkit-transform: translateY(-44.3%) rotate(-45deg);
          transform: translateY(-44.3%) rotate(-45deg);
  -webkit-appearance: none;
  appearance: none;
  background: #ddd;
  border: 3px solid transparent;
  border-color: transparent;
  border-radius: 50%;
  cursor: pointer;
  background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, #0008d7 100%);
  background-attachment: fixed, fixed;
  background-clip: padding-box, border-box;
}

input[type=range]::-moz-range-thumb {
  height: 63px;
  width: 63px;
  appearance: none;
  background: #ddd;
  border: 3px solid transparent;

  border-radius: 50%;
  cursor: pointer;
  background-image: linear-gradient(white, white), linear-gradient(to right, #e0e0e0 34%, #0008d7 100%);
  background-attachment: fixed, fixed;
  background-clip: padding-box, border-box;
}

/* Range value (label) inside of range thumb */
.range-value {
  position: absolute;
  top: -50%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  z-index: 99;
  user-select: none;
  select: none;
  pointer-events: none;
}

.range-value span {
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  color: #fff;
  background: #0008d7;
  font-size: 18px;
  display: block;
  position: absolute;
  top: 20px;
  border-radius: 50%;
  user-select: none;
  select: none;
  pointer-events: none;
  z-index: 100;
}

.range-value::after {
  content: '';
  position: absolute;
  width: 100px;
  height: 50px;
  top: 0;
  left: 0;
  background: white;
  user-select: none;
  select: none;
  pointer-events: none;
  transform: translate(-50%, 96%);
  -webkit-transform: translate(-50%, 92%);
}
<div class="range-wrap">
  <!-- Ticks (lines) over slider. -->
  <div class="ticks" id="tickContainer">
  </div>
  <!-- Range value inside of range thumb -->
  <div class="range-value" id="rangeValue"></div>
  <!-- Range itself -->
  <input id="range" type="range" min="1" max="100" value="1" step="1">
</div>


来源：https://stackoverflow.com/questions/62667840/animating-range-ticks-when-moving-range-thumb

标签
javascript
html
css
animation
rangeslider
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