I am making a weather calculator by using JS range slider in webpage. I am testing the add up function. The problem is at line 122,
the code:
outRest.innerHTML = add(outT, outH);
When I move the humidity bar, the add up result will not update. However, if I use the followimg code, it hasn't problem:
outRest.innerHTML = parseInt(outT) + parseInt(outH);
var slider = document.getElementById("TEMP");
var outputTemp = document.getElementById("tempC");
var outputTemp2 = document.getElementById("tempF");
var slider2 = document.getElementById("HUMD");
var outputHumd = document.getElementById("humd");
var outRest = document.getElementById("test");
var outT = slider.value;
var outH = slider2.value;
var add = parseInt(outT) + parseInt(outH);
outRest.innerHTML = add;
outputTemp.innerHTML = slider.value;
outputTemp2.innerHTML = roundUp(CF(slider.value), 2);
slider.oninput = function() {
outputTemp.innerHTML = this.value;
outputTemp2.innerHTML = roundUp(CF(this.value), 2);
outT = this.value;
outRest.innerHTML = parseInt(outT) + parseInt(outH);
}
outputHumd.innerHTML = slider2.value;
slider2.oninput = function() {
outputHumd.innerHTML = this.value;
outH = this.value;
outRest.innerHTML = add(outT, outH);
}
function CF(CF) {
rest = (CF * (9 / 5)) + 32
return rest
}
function roundUp(num, precision) {
precision = Math.pow(10, precision)
return Math.ceil(num * precision) / precision
}
function add(T, H) {
rest = parseInt(T) + parseInt(H)
return rest
}
.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::-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;
}
</style><style>.slider2 {
-webkit-appearance: none;
width: 100%;
height: 15px;
border-radius: 5px;
background: #d3d3d3;
outline: none;
opacity: 0.7;
-webkit-transition: .2s;
transition: opacity .2s;
}
.slider2::-webkit-slider-thumb {
-webkit-appearance: none;
appearance: none;
width: 25px;
height: 25px;
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
.slider2::-moz-range-thumb {
width: 25px;
height: 25px;
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
<h1>Calculator</h1>
<p>Drag the slider to display the current value.</p>
<div class="slidecontainer">
<input type="range" min="0" max="100" value="50" class="slider" id="TEMP">
<p>Temperature: <span id="tempC"></span> ℃ (<span id="tempF"></span> °F)</p>
</div>
<div class="slidecontainer">
<input type="range" min="0" max="100" value="50" class="slider2" id="HUMD">
<p>Humidity: <span id="humd"></span> %</p>
</div>
<div>
<p>Test: <span id="test"></span> %</p>
</div>
You are trying use add as a function,
outRest.innerHTML = add(outT, outH);
however it's a variable (You can remove this code).
var add = parseInt(outT) + parseInt(outH);
I can see that you have declared an add function already:
function add(T, H) {
rest = parseInt(T) + parseInt(H)
return rest
}
You can simply return the value if you have no other usage of that variable
function CF(CF) {
return (CF * (9 / 5)) + 32
}
function add(T, H) {
return parseInt(T) + parseInt(H);
}
Result:
var slider = document.getElementById("TEMP");
var outputTemp = document.getElementById("tempC");
var outputTemp2 = document.getElementById("tempF");
var slider2 = document.getElementById("HUMD");
var outputHumd = document.getElementById("humd");
var outRest = document.getElementById("test");
var outT = slider.value;
var outH = slider2.value;
//Remove this line
//var add = parseInt(outT) + parseInt(outH);
outRest.innerHTML = add;
outputTemp.innerHTML = slider.value;
outputTemp2.innerHTML = roundUp(CF(slider.value), 2);
slider.oninput = function() {
outputTemp.innerHTML = this.value;
outputTemp2.innerHTML = roundUp(CF(this.value), 2);
outT = this.value;
outRest.innerHTML = parseInt(outT) + parseInt(outH);
}
outputHumd.innerHTML = slider2.value;
slider2.oninput = function() {
outputHumd.innerHTML = this.value;
outH = this.value;
outRest.innerHTML = add(outT, outH);
}
function CF(CF) {
return (CF * (9 / 5)) + 32
}
function roundUp(num, precision) {
precision = Math.pow(10, precision)
return Math.ceil(num * precision) / precision
}
function add(T, H) {
return parseInt(T) + parseInt(H)
}
.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::-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;
}
</style><style>.slider2 {
-webkit-appearance: none;
width: 100%;
height: 15px;
border-radius: 5px;
background: #d3d3d3;
outline: none;
opacity: 0.7;
-webkit-transition: .2s;
transition: opacity .2s;
}
.slider2::-webkit-slider-thumb {
-webkit-appearance: none;
appearance: none;
width: 25px;
height: 25px;
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
.slider2::-moz-range-thumb {
width: 25px;
height: 25px;
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
<h1>Calculator</h1>
<p>Drag the slider to display the current value.</p>
<div class="slidecontainer">
<input type="range" min="0" max="100" value="50" class="slider" id="TEMP">
<p>Temperature: <span id="tempC"></span> ℃ (<span id="tempF"></span> °F)</p>
</div>
<div class="slidecontainer">
<input type="range" min="0" max="100" value="50" class="slider2" id="HUMD">
<p>Humidity: <span id="humd"></span> %</p>
</div>
<div>
<p>Test: <span id="test"></span> %</p>
</div>
just remove this line
var add = parseInt(outT) + parseInt(outH);
as you can see, you have this error because javascript is expecting that you are using 'add' as a function not a variable it's because you are passing two arguments, the 'outT' and 'outH' variables.
TypeError: add is not a function
You can also directly get numeric value ( for type="number" / type="range" ...)
with inputElement.valueAsNumber
sample code
const calculForm = document.getElementById('calcul-form')
, CF = cf => (cf *9 /5 +32).toFixed(2)
;
function setTempHum()
{
let temp = calculForm.TEMP.valueAsNumber
, humd = calculForm.HUMD.valueAsNumber
;
calculForm.valTEMP.value = `${temp} ℃ -- ${CF(temp)} °F`
calculForm.valHUMD.value = `${humd} %`
calculForm.test.value = temp + humd
}
setTempHum() // first time
calculForm.oninput = setTempHum
fieldset { width: 80%; margin: .5em; padding: 1em;}
input[type=range] {
-webkit-appearance: none;
width: 100%;
height: 15px;
border-radius: 5px;
background: #d3d3d3;
outline: none;
opacity: 0.7;
-webkit-transition: .2s;
transition: opacity .2s;
}
input[type=range]::-webkit-slider-thumb {
-webkit-appearance: none;
appearance: none;
width: 25px;
height: 25px;
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
input[type=range]::-moz-range-thumb {
width: 25px;
height: 25px;
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
<form id="calcul-form" onsubmit="return false">
<fieldset>
<input type="range" min="0" max="100" value="50" name="TEMP">
<p>Temperature : <output name="valTEMP"></output></p>
</fieldset>
<fieldset>
<input type="range" min="0" max="100" value="50" name="HUMD">
<p>Humidity : <output name="valHUMD"></output></p>
</fieldset>
<fieldset>
<p>Test : <output name="test"></output></p>
</fieldset>
</form>
Related
I have a slider that works well, but it only allows for whole number values. I need one of the sliders on the page to allow half-step increments (eg., 1, 1.5, 2, 2.5, 3). Is there an easy way to do this?
Here is the CSS:
.slider, .slider2 {
-webkit-appearance: none;
width: 100%;
height: 10px;
border-radius: 5px;
background: #999;
outline: none;
opacity: 1;
-webkit-transition: .2s;
transition: opacity .2s;
}
.slider:hover, .slider2:hover {
opacity: 1;
}
.slider::-webkit-slider-thumb, .slider2::-webkit-slider-thumb {
-webkit-appearance: none;
appearance: none;
width: 35px;
height: 35px;
border-radius: 50%;
background: #fff;
cursor: pointer;
}
.slider::-moz-range-thumb, .slider2::-moz-range-thumb {
width: 35px;
height: 35px;
border-radius: 50%;
background: #fff;
cursor: pointer;
}
Here is the HTML:
<input name="newbelief" type="range" min="1" max="9" value="" class="slider2" id="newbelief">
Here is the javascript:
<script>
var slider = document.getElementById("oldbelief");
var output = document.getElementById("belief_value");
output.innerHTML = slider.value;
slider.oninput = function() {
output.innerHTML = this.value;
}
var slider2 = document.getElementById("newbelief");
var output2 = document.getElementById("belief2_value");
output2.innerHTML = slider2.value;
slider2.oninput = function() {
output2.innerHTML = this.value;
}
</script>
I needed to add a "step" value to the form. So it should look like this:
<input name="newbelief" type="range" min="1" max="9" step="0.5" value="" class="slider2" id="newbelief">
I'm working with the range input here I'm trying to add color to the slider thumb before I had tried using background gradient but unable to achieve the desired output. when if I remove max="5" then its working fine. below is my code
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = slider.value;
slider.oninput = function() {
output.innerHTML = this.value;
}
.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;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slidecontainer">
<input type="range" min="1" max="5" value="50" class="slider" id="myRange">
<p>Value: <span id="demo"></span></p>
</div>
What you can do is to use a CSS linear-gradient() for the background of your range element. The gradient will look like this:
linear-gradient(90deg, #4CAF50 ${percentage}%, transparent ${percentage}%)
Where percentage is the abrupt transition point from your color green to transparent. To calculate this percentage, some math is required: you will want to calculate the relative value of the input element to its minimum and maximum values. This can be computed as such:
const percentage = (e.target.value - slider.min) / (slider.max - slider.min) * 100;
See proof-of-concept below:
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = slider.value;
function updateGradient(rangeValue) {
const percentage = (rangeValue - slider.min) / (slider.max - slider.min) * 100;
slider.style.backgroundImage = `linear-gradient(90deg, #4CAF50 ${percentage}%, transparent ${percentage}%)`;
}
// Update gradient onload
updateGradient(slider.value);
// Update gradient oninput
slider.addEventListener('input', (e) => {
output.innerHTML = e.target.value;
updateGradient(e.target.value);
});
.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;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slidecontainer">
<input type="range" min="1" max="5" value="50" class="slider" id="myRange">
<p>Value: <span id="demo"></span></p>
</div>
Even better: Use CSS custom properties / variables
Even better: you don't have to hardcode the color value in your JS, if you just use CSS variables/custom properties. In this case, we simply pass the calculated percentage as a string to the --percentage custom property:
background-image: linear-gradient(90deg, #4CAF50 var(--percentage), transparent var(--percentage));
Then, in your JS, it is as simply as doing this:
const percentage = (rangeValue - slider.min) / (slider.max - slider.min) * 100;
slider.style.setProperty('--percentage', percentage + '%');
See example below:
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = slider.value;
function updateGradient(rangeValue) {
const percentage = (rangeValue - slider.min) / (slider.max - slider.min) * 100;
slider.style.setProperty('--percentage', percentage + '%');
}
// Update gradient onload
updateGradient(slider.value);
// Update gradient oninput
slider.addEventListener('input', (e) => {
output.innerHTML = e.target.value;
updateGradient(e.target.value);
});
.slider {
-webkit-appearance: none;
width: 100%;
height: 15px;
border-radius: 5px;
background-color: #d3d3d3;
background-image: linear-gradient(90deg, #4CAF50 var(--percentage), transparent var(--percentage));
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;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slidecontainer">
<input type="range" min="1" max="5" value="50" class="slider" id="myRange">
<p>Value: <span id="demo"></span></p>
</div>
Adding box-shadow to your thumb and make overflow hidden of the slider class is doing the job.
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = slider.value;
slider.oninput = function() {
output.innerHTML = this.value;
}
.slider {
-webkit-appearance: none;
width: 100%;
height: 15px;
border-radius: 5px;
background: white;
outline: none;
opacity: 0.7;
-webkit-transition: .2s;
transition: opacity .2s;
overflow:hidden;
}
.slider:hover {
opacity: 1;
}
.slider::-webkit-slider-thumb {
-webkit-appearance: none;
appearance: none;
width: 25px;
height: 25px;
border-radius: 50%;
background: yellow;
cursor: pointer;
box-shadow: -407px 0 0 407px green;
z-index:2;
}
.slider::-moz-range-thumb {
width: 25px;
height: 25px;
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
.input{
overflow:hidden;
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slidecontainer">
<input type="range" min="1" max="5" value="50" class="slider" id="myRange">
<p>Value: <span id="demo"></span></p>
</div>
For example if the user is at 22 in range slider then dont let user go down to 21 and so on. The user should only be able to scroll to the right side.
I am using range slider to select plans and I dont want user to downgrade plan thats why I want this functionality.
Is it possible?
https://jsfiddle.net/59xL36b8/
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.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;
}
</style>
</head>
<body>
<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>
<script>
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = slider.value;
slider.oninput = function() {
output.innerHTML = this.value;
}
</script>
</body>
</html>
This should work for you.
Just don't let the value get beneath the minimum value.
var minValue = 0;
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.innerHTML = slider.value;
slider.oninput = function(e) {
if (slider.value > minValue) {
output.innerHTML = this.value;
minValue = this.value;
} else {
this.value = minValue;
}
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.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;
}
</style>
</head>
<body>
<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>
</body>
</html>
You could maintain a variable which holds the previous value and prevents the user to set the value to one lower than what the variable holds.
var prev_value = 50 //For example;
slider.oninput = function(ev) {
if (parseInt(ev.target.value) < prev_value) {
ev.preventDefault();
this.value = prev_value;
}
output.innerHTML = this.value;
}
Here is a fiddle - https://jsfiddle.net/L5tgx8ys/1/
Why is the text field completely empty upon load and stays empty regardless of my slider value?
Subquestion: Should they be linked? If I enter a value in the input text field, should the slider move accordingly?
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: 25px;
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; background:
#4CAF50; cursor: pointer; }
.slider::-moz-range-thumb { width: 25px; height: 25px;
background: #4CAF50; cursor: pointer; }
<div class="slidecontainer">
<input type="range" min="1000" max="5000000"
value="250000" class="slider" id="myRange">
<input type="text" id="demo" value="">
</div>
Use code as below
Use .value instead innerHTML and use oninput="myFunction(this)" to #slide
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.value = slider.value;
function myFunction(x) {
output.value = x.value;
}
.slidecontainer { width: 100%; }
.slider { -webkit-appearance: none; width: 100%; height: 25px;
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; background:
#4CAF50; cursor: pointer; }
.slider::-moz-range-thumb { width: 25px; height: 25px;
background: #4CAF50; cursor: pointer; }
<div class="slidecontainer">
<input type="range" min="1000" max="5000000" oninput="myFunction(this)"
value="250000" class="slider" id="myRange"/>
<input type="text" id="demo" value=""/>
</div>
Subquestion:
Use onchange="setSlider(this)" when change #demo the slide will move when you click Enter or out from #demo
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.value = slider.value;
function myFunction(x) {
output.value = x.value;
}
function setSlider(x) {
slider.value= x.value;
}
.slidecontainer { width: 100%; }
.slider { -webkit-appearance: none; width: 100%; height: 25px;
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; background:
#4CAF50; cursor: pointer; }
.slider::-moz-range-thumb { width: 25px; height: 25px;
background: #4CAF50; cursor: pointer; }
<div class="slidecontainer">
<input type="range" min="1000" max="5000000" oninput="myFunction(this)"
value="250000" class="slider" id="myRange"/>
<input type="text" id="demo" value="" onchange="setSlider(this)"/>
</div>
Value is normally used for input/form elements. innerHTML is normally used for div, span, td and similar elements.
For input change you can bind on change event on input obj
var slider = document.getElementById("myRange");
var output = document.getElementById("demo");
output.value = slider.value; // input have value not innerhtml
slider.oninput = function() {
output.value = this.value;
}
output.addEventListener("change", function() {
slider.value = this.value;
});
I want to make a slider that changes the dot size when the value changes.
So value 1 will be a size of 10px and value 100 will be size 100px.
How am a able to change the .slider::-webkit-slider-thumb height with 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>
what I tried =
document.getElementById("myRange").style.webkitTransform = "height: 100px";
Okay, so, before answering the question:
::-webkit-slider-thumb is a pseudo element. Those elements are not part of the DOM. Therefore, changing them in JavaScript can get a bit hacky.
A proper solution would be completely replacing the thumb with another element.
Now to answer the question: You could inject styles into an <style> element with a given attribute when the slider value changes.
So you would add
<style data="test" type="text/css"></style>
to your header, then target the element and add CSS to it like that:
var style = document.querySelector('[data="test"]');
style.innerHTML = ".class { property: value; }";
This, combined with the code you provided at this link would be a solution to your problem.
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>
Also: you said
So value 1 will be a size of 10px and value 100 will be size 100px.
If you want an approach like value 1 to 10 equals 10px and everything above value 10 is the actual value in pixels, you can change 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; }";
A Live demo of this version can be found HERE
2022 - Use CSS variables
The accepted answer works, but it's a lot of code and hard to understand. This can be done a lot easier these days...
In your CSS just add a variable like this --sliderSize:
.slider {
--sliderSize: 25px; /* <---- Add this */
-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); /* <---- Set the variable here */
height: var(--sliderSize); /* <--- and here */
border-radius: 50%;
background: #4CAF50;
cursor: pointer;
}
Then in your JavaScript simply set the variable to whatever you want using setProperty:
const newSliderSize = '100px'; // this could be a passed in dynamic value, etc.
document.getElementById("myRange").style.setProperty('--sliderSize', newSliderSize);
Here is a working fiddle of it all put together:
const newSliderSize = '50px'; // this could be a passed in dynamic value, etc.
document.getElementById("myRange").style.setProperty('--sliderSize', newSliderSize);
.slider {
--sliderSize: 25px; /* <---- Add this */
-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); /* <---- Set 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" />