In order to implement the functionality in JavaScript, the .slider::-webkit-slider

Question

In order to implement the functionality in JavaScript, the .slider::-webkit-slider

I need to create a slider that adjusts the size of the dot based on the value input. For example, when the value is 1, the dot size should be 10px and for a value of 100, it should be 100px.

Is there a way to dynamically change the height of .slider::-webkit-slider-thumb using JavaScript?

var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = slider.value;

slider.oninput = function() {
  output.innerHTML = this.value;
}

.slidecontainer {
  width: 100%;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 15px;
  border-radius: 5px;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider:hover {
  opacity: 1;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: #4CAF50;
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: #4CAF50;
  cursor: pointer;
}

<h1>Round Range Slider</h1>

<div class="" "slidecontainer">
  <input type="range" min="1" max="100" value="50" class="slider" id="myRange">
  <p>Value: <span id="demo"></span></p>
</div>

My attempt so far:

document.getElementById("myRange").style.webkitTransform = "height: 100px";

javascript html css webkit

Answer 1

Answer №1

Before delving into the question, it's important to note that ::-webkit-slider-thumb is a pseudo element, not part of the DOM. Manipulating these elements with JavaScript can be cumbersome.

A more effective solution would involve replacing the thumb entirely with another element.

To address the question at hand: you can inject styles into a <style> element with a specified attribute when the slider value changes.

Add the following code snippet to your header:

<style data="test" type="text/css"></style>

Then target the element and apply CSS like so:

var style = document.querySelector('[data="test"]');
style.innerHTML = ".class { property: value; }";

This method, alongside your existing code available in this link, can solve your issue.

Demo:

var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
var style = document.querySelector('[data="test"]');

setData(slider.value);

slider.oninput = function() {
    setData(this.value);
}

function setData(x){
    output.innerHTML = x;
    style.innerHTML = ".slider::-webkit-slider-thumb { width: " + x + "px !important; height: " + x + "px !important; }";
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: #4CAF50;
    cursor: pointer;
}
.slider {
    margin-top: 40px;
    -webkit-appearance: none;
    width: 100%;
    height: 15px;
    border-radius: 5px;
    background: #d3d3d3;
    outline: none;
}

<style data="test" type="text/css"></style>

<input type="range" min="1" max="100" value="50" class="slider" id="myRange">
<p>Value: <span id="demo"></span></p>

You mentioned:

So value 1 will be a size of 10px and value 100 will be size 100px.

If you prefer an approach where values 1 to 10 represent 10px, whereas anything above 10 reflects the actual pixel value, modify the line:

style.innerHTML = "...";

to

style.innerHTML = ".slider::-webkit-slider-thumb { width: " + (x < 10 ? 10 : x)  + "px !important; height: " + (x < 10 ? 10 : x) + "px !important; }";

An interactive demo showcasing this version is accessible HERE

Answer 2

Before delving into the question, it's important to note that ::-webkit-slider-thumb is a pseudo element, not part of the DOM. Manipulating these elements with JavaScript can be cumbersome.

A more effective solution would involve replacing the thumb entirely with another element.

To address the question at hand: you can inject styles into a <style> element with a specified attribute when the slider value changes.

Add the following code snippet to your header:

<style data="test" type="text/css"></style>

Then target the element and apply CSS like so:

var style = document.querySelector('[data="test"]');
style.innerHTML = ".class { property: value; }";

This method, alongside your existing code available in this link, can solve your issue.

Demo:

var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
var style = document.querySelector('[data="test"]');

setData(slider.value);

slider.oninput = function() {
    setData(this.value);
}

function setData(x){
    output.innerHTML = x;
    style.innerHTML = ".slider::-webkit-slider-thumb { width: " + x + "px !important; height: " + x + "px !important; }";
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    background: #4CAF50;
    cursor: pointer;
}
.slider {
    margin-top: 40px;
    -webkit-appearance: none;
    width: 100%;
    height: 15px;
    border-radius: 5px;
    background: #d3d3d3;
    outline: none;
}

<style data="test" type="text/css"></style>

<input type="range" min="1" max="100" value="50" class="slider" id="myRange">
<p>Value: <span id="demo"></span></p>

You mentioned:

So value 1 will be a size of 10px and value 100 will be size 100px.

If you prefer an approach where values 1 to 10 represent 10px, whereas anything above 10 reflects the actual pixel value, modify the line:

style.innerHTML = "...";

to

style.innerHTML = ".slider::-webkit-slider-thumb { width: " + (x < 10 ? 10 : x)  + "px !important; height: " + (x < 10 ? 10 : x) + "px !important; }";

An interactive demo showcasing this version is accessible HERE

Answer 3

Answer №2

Discover the Magic of CSS Variables in 2023

The existing solution may get the job done, but it's quite lengthy and can be challenging to grasp. Luckily, there's a simpler way to achieve the same result...

All you need to do in your CSS is define a variable like --sliderSize:

.slider {
  --sliderSize: 25px; /* <---- Include this line */
  -webkit-appearance: none;
  width: 100%;
  height: 15px;
  border-radius: 5px;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: var(--sliderSize); /* <---- Utilize the variable here */
  height: var(--sliderSize); /* <--- and here */
  border-radius: 50%;
  background: #4CAF50;
  cursor: pointer;
}

Then, in your JavaScript code, simply assign a value to the variable using setProperty:

const newSliderSize = '100px'; // This could come from user input or elsewhere
document.getElementById("myRange").style.setProperty('--sliderSize', newSliderSize);

Check out this interactive example showcasing the concept:

    const newSliderSize = '50px'; // Dynamic value assignment example
    document.getElementById("myRange").style.setProperty('--sliderSize', newSliderSize);

  .slider {
      --sliderSize: 25px; /* <---- Include this line */
      -webkit-appearance: none;
      width: 100%;
      height: 15px;
      border-radius: 5px;
      background: #d3d3d3;
      outline: none;
      opacity: 0.7;
      -webkit-transition: .2s;
      transition: opacity .2s;
    }

    .slider::-webkit-slider-thumb {
      -webkit-appearance: none;
      appearance: none;
      width: var(--sliderSize); /* <---- Utilize the variable here */
      height: var(--sliderSize); /* <--- and here */
      border-radius: 50%;
      background: #4CAF50;
      cursor: pointer;
    }

<input type="range" min="1" max="100" id="myRange" class="slider" />

Answer 4

Discover the Magic of CSS Variables in 2023

The existing solution may get the job done, but it's quite lengthy and can be challenging to grasp. Luckily, there's a simpler way to achieve the same result...

All you need to do in your CSS is define a variable like --sliderSize:

.slider {
  --sliderSize: 25px; /* <---- Include this line */
  -webkit-appearance: none;
  width: 100%;
  height: 15px;
  border-radius: 5px;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: var(--sliderSize); /* <---- Utilize the variable here */
  height: var(--sliderSize); /* <--- and here */
  border-radius: 50%;
  background: #4CAF50;
  cursor: pointer;
}

Then, in your JavaScript code, simply assign a value to the variable using setProperty:

const newSliderSize = '100px'; // This could come from user input or elsewhere
document.getElementById("myRange").style.setProperty('--sliderSize', newSliderSize);

Check out this interactive example showcasing the concept:

    const newSliderSize = '50px'; // Dynamic value assignment example
    document.getElementById("myRange").style.setProperty('--sliderSize', newSliderSize);

  .slider {
      --sliderSize: 25px; /* <---- Include this line */
      -webkit-appearance: none;
      width: 100%;
      height: 15px;
      border-radius: 5px;
      background: #d3d3d3;
      outline: none;
      opacity: 0.7;
      -webkit-transition: .2s;
      transition: opacity .2s;
    }

    .slider::-webkit-slider-thumb {
      -webkit-appearance: none;
      appearance: none;
      width: var(--sliderSize); /* <---- Utilize the variable here */
      height: var(--sliderSize); /* <--- and here */
      border-radius: 50%;
      background: #4CAF50;
      cursor: pointer;
    }

<input type="range" min="1" max="100" id="myRange" class="slider" />

In order to implement the functionality in JavaScript, the .slider::-webkit-slider

Answer №1

Answer №2

Discover the Magic of CSS Variables in 2023

Check out this interactive example showcasing the concept:

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