Write value of range to thumb slider - javascript

I want to write the value of range input to the thumb. I looked to every single question about this I could find on Google and I didn't find a solution.
I also want to when the value is 10001 I want it to show ∞ instead.
I have tried:
$('#km').on('input', function() {
if ($(this).val() === "10001") {
console.log("infinity");
$(this).addClass("range-infinite")
} else {
$(this).removeClass("range-infinite");
}
});
.range {
-webkit-appearance: none;
-moz-apperance: none;
background-image: linear-gradient(to right, #1299E6, #A0D9F9);
width: 90%;
margin-left: 70px;
height: 1px;
margin-bottom: 40px;
border-top: none;
}
.range::-webkit-slider-thumb {
appearance: none;
-webkit-appearance: none;
-moz-apperance: none;
height: 30px;
width: 80px;
background: #1299E6;
border: 1px solid #A0D9F9;
border-radius: 40px;
}
.range::-webkit-slider-thumb::before {
content: attr(data-val)
}
.range-infinite::before {
content: "∞";
}
.range input[type=range] {
border: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="range-div">
<input type="range" name="" id="" class="range">
</div>
but it doesn't seem to work.
Any help is appreciated.


:before and :after pseudo will not work on Form Action elements like input.
Instead use a span for example.
$('.range').on('input', function() {
var val = parseInt( this.value, 10 );
var v = val >= parseInt(this.max, 10) ? '∞' : val;
$(this).next('span').attr("data-val", v);
}).trigger('input');
.unit::before {
content: attr(data-val);
}
<input type="range" name="" class="range" min=0 max=10001 step=1 value=0>
<span class="unit">km</span>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Update input range thumb value
If you want the .range-thumb SPAN element to follow-up with your value you could:
Position your SPAN thumb absolute into a relative parent.
Calculate and transform your value into thumb position px.
Given the thumb is always at width 100 here's an example:
var $range = $('.range');
$range.each(function() {
var $thumb = $(this).next('.range-thumb');
var max = parseInt(this.max, 10);
var tw = 100; // Thumb width. See CSS
$(this).on('input input.range', function() {
var w = $(this).width();
var val = parseInt(this.value, 10);
var txt = val >= max ? '∞' : val;
var xPX = val * (w - tw) / max; // Position in PX
// var xPC = xPX * 100 / w; // Position in % (if ever needed)
$thumb.css({left: xPX}).attr("data-val", txt);
});
});
$range.trigger('input.range'); // Calc on load
$(window).on("resize", () => $range.trigger("input.range")); // and on resize
/* QuickReset */
*{margin:0;box-sizing:border-box;}html,body{height:100%;font:14px/1.4 sans-serif;}
/* CUSTOM RANGE INPUT */
.range-div {
position: relative;
}
.range {
appearance: none;
-webkit-appearance: none;
-moz-appearance: none;
background-image: linear-gradient(to right, #1299E6, #A0D9F9);
width: 100%;
height: 1px;
outline: none;
}
.range:active::-webkit-slider-thumb {
box-shadow: 0 2px 5px -2px rgba(0, 0, 0, 0.4);
}
.range::-webkit-slider-thumb {
appearance: none;
-webkit-appearance: none;
-moz-appearance: none;
height: 30px;
width: 100px;
background: #1299E6;
border-radius: 30px;
cursor: grab;
}
.range-thumb {
position: absolute;
left: 0px;
/* half :thumb width */
top: 0;
width: 100px;
/* same as :thumb */
height: 30px;
/* same as :thumb */
text-align: center;
color: #fff;
line-height: 30px;
font-size: 12px;
pointer-events: none;
/* ignore mouse */
}
.range-thumb::before {
content: attr(data-val) " ";
}
<div class="range-div">
<input type="range" name="" class="range" min=0 max=10001 step=1 value=0>
<span class="range-thumb">km</span>
</div>
<script src="//code.jquery.com/jquery-3.1.0.js"></script>

Related

Accessible input elements without label [duplicate]

Is it possible to make a HTML5 slider with two input values, for example to select a price range? If so, how can it be done?

I've been looking for a lightweight, dependency free dual slider for some time (it seemed crazy to import jQuery just for this) and there don't seem to be many out there. I ended up modifying #Wildhoney's code a bit and really like it.
function getVals(){
// Get slider values
var parent = this.parentNode;
var slides = parent.getElementsByTagName("input");
var slide1 = parseFloat( slides[0].value );
var slide2 = parseFloat( slides[1].value );
// Neither slider will clip the other, so make sure we determine which is larger
if( slide1 > slide2 ){ var tmp = slide2; slide2 = slide1; slide1 = tmp; }
var displayElement = parent.getElementsByClassName("rangeValues")[0];
displayElement.innerHTML = slide1 + " - " + slide2;
}
window.onload = function(){
// Initialize Sliders
var sliderSections = document.getElementsByClassName("range-slider");
for( var x = 0; x < sliderSections.length; x++ ){
var sliders = sliderSections[x].getElementsByTagName("input");
for( var y = 0; y < sliders.length; y++ ){
if( sliders[y].type ==="range" ){
sliders[y].oninput = getVals;
// Manually trigger event first time to display values
sliders[y].oninput();
}
}
}
}
section.range-slider {
position: relative;
width: 200px;
height: 35px;
text-align: center;
}
section.range-slider input {
pointer-events: none;
position: absolute;
overflow: hidden;
left: 0;
top: 15px;
width: 200px;
outline: none;
height: 18px;
margin: 0;
padding: 0;
}
section.range-slider input::-webkit-slider-thumb {
pointer-events: all;
position: relative;
z-index: 1;
outline: 0;
}
section.range-slider input::-moz-range-thumb {
pointer-events: all;
position: relative;
z-index: 10;
-moz-appearance: none;
width: 9px;
}
section.range-slider input::-moz-range-track {
position: relative;
z-index: -1;
background-color: rgba(0, 0, 0, 1);
border: 0;
}
section.range-slider input:last-of-type::-moz-range-track {
-moz-appearance: none;
background: none transparent;
border: 0;
}
section.range-slider input[type=range]::-moz-focus-outer {
border: 0;
}
<!-- This block can be reused as many times as needed -->
<section class="range-slider">
<span class="rangeValues"></span>
<input value="5" min="0" max="15" step="0.5" type="range">
<input value="10" min="0" max="15" step="0.5" type="range">
</section>

No, the HTML5 range input only accepts one input. I would recommend you to use something like the jQuery UI range slider for that task.

Coming late, but noUiSlider avoids having a jQuery-ui dependency, which the accepted answer does not. Its only "caveat" is IE support is for IE9 and newer, if legacy IE is a deal breaker for you.
It's also free, open source and can be used in commercial projects without restrictions.
Installation: Download noUiSlider, extract the CSS and JS file somewhere in your site file system, and then link to the CSS from head and to JS from body:
<!-- In <head> -->
<link href="nouislider.min.css" rel="stylesheet">
<!-- In <body> -->
<script src="nouislider.min.js"></script>
Example usage: Creates a slider which goes from 0 to 100, and starts set to 20-80.
HTML:
<div id="slider">
</div>
JS:
var slider = document.getElementById('slider');
noUiSlider.create(slider, {
start: [20, 80],
connect: true,
range: {
'min': 0,
'max': 100
}
});

Sure you can simply use two sliders overlaying each other and add a bit of javascript (actually not more than 5 lines) that the selectors are not exceeding the min/max values (like in #Garys) solution.
Attached you'll find a short snippet adapted from a current project including some CSS3 styling to show what you can do (webkit only). I also added some labels to display the selected values.
It uses JQuery but a vanillajs version is no magic though.
#Update: The code below was just a proof of concept. Due to many requests I've added a possible solution for Mozilla Firefox (without changing the original code). You may want to refractor the code below before using it.
(function() {
function addSeparator(nStr) {
nStr += '';
var x = nStr.split('.');
var x1 = x[0];
var x2 = x.length > 1 ? '.' + x[1] : '';
var rgx = /(\d+)(\d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + '.' + '$2');
}
return x1 + x2;
}
function rangeInputChangeEventHandler(e){
var rangeGroup = $(this).attr('name'),
minBtn = $(this).parent().children('.min'),
maxBtn = $(this).parent().children('.max'),
range_min = $(this).parent().children('.range_min'),
range_max = $(this).parent().children('.range_max'),
minVal = parseInt($(minBtn).val()),
maxVal = parseInt($(maxBtn).val()),
origin = $(this).context.className;
if(origin === 'min' && minVal > maxVal-5){
$(minBtn).val(maxVal-5);
}
var minVal = parseInt($(minBtn).val());
$(range_min).html(addSeparator(minVal*1000) + ' €');
if(origin === 'max' && maxVal-5 < minVal){
$(maxBtn).val(5+ minVal);
}
var maxVal = parseInt($(maxBtn).val());
$(range_max).html(addSeparator(maxVal*1000) + ' €');
}
$('input[type="range"]').on( 'input', rangeInputChangeEventHandler);
})();
body{
font-family: sans-serif;
font-size:14px;
}
input[type='range'] {
width: 210px;
height: 30px;
overflow: hidden;
cursor: pointer;
outline: none;
}
input[type='range'],
input[type='range']::-webkit-slider-runnable-track,
input[type='range']::-webkit-slider-thumb {
-webkit-appearance: none;
background: none;
}
input[type='range']::-webkit-slider-runnable-track {
width: 200px;
height: 1px;
background: #003D7C;
}
input[type='range']:nth-child(2)::-webkit-slider-runnable-track{
background: none;
}
input[type='range']::-webkit-slider-thumb {
position: relative;
height: 15px;
width: 15px;
margin-top: -7px;
background: #fff;
border: 1px solid #003D7C;
border-radius: 25px;
z-index: 1;
}
input[type='range']:nth-child(1)::-webkit-slider-thumb{
z-index: 2;
}
.rangeslider{
position: relative;
height: 60px;
width: 210px;
display: inline-block;
margin-top: -5px;
margin-left: 20px;
}
.rangeslider input{
position: absolute;
}
.rangeslider{
position: absolute;
}
.rangeslider span{
position: absolute;
margin-top: 30px;
left: 0;
}
.rangeslider .right{
position: relative;
float: right;
margin-right: -5px;
}
/* Proof of concept for Firefox */
#-moz-document url-prefix() {
.rangeslider::before{
content:'';
width:100%;
height:2px;
background: #003D7C;
display:block;
position: relative;
top:16px;
}
input[type='range']:nth-child(1){
position:absolute;
top:35px !important;
overflow:visible !important;
height:0;
}
input[type='range']:nth-child(2){
position:absolute;
top:35px !important;
overflow:visible !important;
height:0;
}
input[type='range']::-moz-range-thumb {
position: relative;
height: 15px;
width: 15px;
margin-top: -7px;
background: #fff;
border: 1px solid #003D7C;
border-radius: 25px;
z-index: 1;
}
input[type='range']:nth-child(1)::-moz-range-thumb {
transform: translateY(-20px);
}
input[type='range']:nth-child(2)::-moz-range-thumb {
transform: translateY(-20px);
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div class="rangeslider">
<input class="min" name="range_1" type="range" min="1" max="100" value="10" />
<input class="max" name="range_1" type="range" min="1" max="100" value="90" />
<span class="range_min light left">10.000 €</span>
<span class="range_max light right">90.000 €</span>
</div>

Actually I used my script in html directly. But in javascript when you add oninput event listener for this event it gives the data automatically.You just need to assign the value as per your requirement.
[slider] {
width: 300px;
position: relative;
height: 5px;
margin: 45px 0 10px 0;
}
[slider] > div {
position: absolute;
left: 13px;
right: 15px;
height: 5px;
}
[slider] > div > [inverse-left] {
position: absolute;
left: 0;
height: 5px;
border-radius: 10px;
background-color: #CCC;
margin: 0 7px;
}
[slider] > div > [inverse-right] {
position: absolute;
right: 0;
height: 5px;
border-radius: 10px;
background-color: #CCC;
margin: 0 7px;
}
[slider] > div > [range] {
position: absolute;
left: 0;
height: 5px;
border-radius: 14px;
background-color: #d02128;
}
[slider] > div > [thumb] {
position: absolute;
top: -7px;
z-index: 2;
height: 20px;
width: 20px;
text-align: left;
margin-left: -11px;
cursor: pointer;
box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
background-color: #FFF;
border-radius: 50%;
outline: none;
}
[slider] > input[type=range] {
position: absolute;
pointer-events: none;
-webkit-appearance: none;
z-index: 3;
height: 14px;
top: -2px;
width: 100%;
opacity: 0;
}
div[slider] > input[type=range]:focus::-webkit-slider-runnable-track {
background: transparent;
border: transparent;
}
div[slider] > input[type=range]:focus {
outline: none;
}
div[slider] > input[type=range]::-webkit-slider-thumb {
pointer-events: all;
width: 28px;
height: 28px;
border-radius: 0px;
border: 0 none;
background: red;
-webkit-appearance: none;
}
div[slider] > input[type=range]::-ms-fill-lower {
background: transparent;
border: 0 none;
}
div[slider] > input[type=range]::-ms-fill-upper {
background: transparent;
border: 0 none;
}
div[slider] > input[type=range]::-ms-tooltip {
display: none;
}
[slider] > div > [sign] {
opacity: 0;
position: absolute;
margin-left: -11px;
top: -39px;
z-index:3;
background-color: #d02128;
color: #fff;
width: 28px;
height: 28px;
border-radius: 28px;
-webkit-border-radius: 28px;
align-items: center;
-webkit-justify-content: center;
justify-content: center;
text-align: center;
}
[slider] > div > [sign]:after {
position: absolute;
content: '';
left: 0;
border-radius: 16px;
top: 19px;
border-left: 14px solid transparent;
border-right: 14px solid transparent;
border-top-width: 16px;
border-top-style: solid;
border-top-color: #d02128;
}
[slider] > div > [sign] > span {
font-size: 12px;
font-weight: 700;
line-height: 28px;
}
[slider]:hover > div > [sign] {
opacity: 1;
}
<div slider id="slider-distance">
<div>
<div inverse-left style="width:70%;"></div>
<div inverse-right style="width:70%;"></div>
<div range style="left:0%;right:0%;"></div>
<span thumb style="left:0%;"></span>
<span thumb style="left:100%;"></span>
<div sign style="left:0%;">
<span id="value">0</span>
</div>
<div sign style="left:100%;">
<span id="value">100</span>
</div>
</div>
<input type="range" value="0" max="100" min="0" step="1" oninput="
this.value=Math.min(this.value,this.parentNode.childNodes[5].value-1);
let value = (this.value/parseInt(this.max))*100
var children = this.parentNode.childNodes[1].childNodes;
children[1].style.width=value+'%';
children[5].style.left=value+'%';
children[7].style.left=value+'%';children[11].style.left=value+'%';
children[11].childNodes[1].innerHTML=this.value;" />
<input type="range" value="100" max="100" min="0" step="1" oninput="
this.value=Math.max(this.value,this.parentNode.childNodes[3].value-(-1));
let value = (this.value/parseInt(this.max))*100
var children = this.parentNode.childNodes[1].childNodes;
children[3].style.width=(100-value)+'%';
children[5].style.right=(100-value)+'%';
children[9].style.left=value+'%';children[13].style.left=value+'%';
children[13].childNodes[1].innerHTML=this.value;" />
</div>

The question was: "Is it possible to make a HTML5 slider with two input values, for example to select a price range? If so, how can it be done?"
In 2020 it is possible to create a fully accessible, native, non-jquery HTML5 slider with two thumbs for price ranges. If found this posted after I already created this solution and I thought that it would be nice to share my implementation here.
This implementation has been tested on mobile Chrome and Firefox (Android) and Chrome and Firefox (Linux). I am not sure about other platforms, but it should be quite good. I would love to get your feedback and improve this solution.
This solution allows multiple instances on one page and it consists of just two inputs (each) with descriptive labels for screen readers. You can set the thumb size in the amount of grid labels. Also, you can use touch, keyboard and mouse to interact with the slider. The value is updated during adjustment, due to the 'on input' event listener.
My first approach was to overlay the sliders and clip them. However, that resulted in complex code with a lot of browser dependencies. Then I recreated the solution with two sliders that were 'inline'. This is the solution you will find below.
var thumbsize = 14;
function draw(slider,splitvalue) {
/* set function vars */
var min = slider.querySelector('.min');
var max = slider.querySelector('.max');
var lower = slider.querySelector('.lower');
var upper = slider.querySelector('.upper');
var legend = slider.querySelector('.legend');
var thumbsize = parseInt(slider.getAttribute('data-thumbsize'));
var rangewidth = parseInt(slider.getAttribute('data-rangewidth'));
var rangemin = parseInt(slider.getAttribute('data-rangemin'));
var rangemax = parseInt(slider.getAttribute('data-rangemax'));
/* set min and max attributes */
min.setAttribute('max',splitvalue);
max.setAttribute('min',splitvalue);
/* set css */
min.style.width = parseInt(thumbsize + ((splitvalue - rangemin)/(rangemax - rangemin))*(rangewidth - (2*thumbsize)))+'px';
max.style.width = parseInt(thumbsize + ((rangemax - splitvalue)/(rangemax - rangemin))*(rangewidth - (2*thumbsize)))+'px';
min.style.left = '0px';
max.style.left = parseInt(min.style.width)+'px';
min.style.top = lower.offsetHeight+'px';
max.style.top = lower.offsetHeight+'px';
legend.style.marginTop = min.offsetHeight+'px';
slider.style.height = (lower.offsetHeight + min.offsetHeight + legend.offsetHeight)+'px';
/* correct for 1 off at the end */
if(max.value>(rangemax - 1)) max.setAttribute('data-value',rangemax);
/* write value and labels */
max.value = max.getAttribute('data-value');
min.value = min.getAttribute('data-value');
lower.innerHTML = min.getAttribute('data-value');
upper.innerHTML = max.getAttribute('data-value');
}
function init(slider) {
/* set function vars */
var min = slider.querySelector('.min');
var max = slider.querySelector('.max');
var rangemin = parseInt(min.getAttribute('min'));
var rangemax = parseInt(max.getAttribute('max'));
var avgvalue = (rangemin + rangemax)/2;
var legendnum = slider.getAttribute('data-legendnum');
/* set data-values */
min.setAttribute('data-value',rangemin);
max.setAttribute('data-value',rangemax);
/* set data vars */
slider.setAttribute('data-rangemin',rangemin);
slider.setAttribute('data-rangemax',rangemax);
slider.setAttribute('data-thumbsize',thumbsize);
slider.setAttribute('data-rangewidth',slider.offsetWidth);
/* write labels */
var lower = document.createElement('span');
var upper = document.createElement('span');
lower.classList.add('lower','value');
upper.classList.add('upper','value');
lower.appendChild(document.createTextNode(rangemin));
upper.appendChild(document.createTextNode(rangemax));
slider.insertBefore(lower,min.previousElementSibling);
slider.insertBefore(upper,min.previousElementSibling);
/* write legend */
var legend = document.createElement('div');
legend.classList.add('legend');
var legendvalues = [];
for (var i = 0; i < legendnum; i++) {
legendvalues[i] = document.createElement('div');
var val = Math.round(rangemin+(i/(legendnum-1))*(rangemax - rangemin));
legendvalues[i].appendChild(document.createTextNode(val));
legend.appendChild(legendvalues[i]);
}
slider.appendChild(legend);
/* draw */
draw(slider,avgvalue);
/* events */
min.addEventListener("input", function() {update(min);});
max.addEventListener("input", function() {update(max);});
}
function update(el){
/* set function vars */
var slider = el.parentElement;
var min = slider.querySelector('#min');
var max = slider.querySelector('#max');
var minvalue = Math.floor(min.value);
var maxvalue = Math.floor(max.value);
/* set inactive values before draw */
min.setAttribute('data-value',minvalue);
max.setAttribute('data-value',maxvalue);
var avgvalue = (minvalue + maxvalue)/2;
/* draw */
draw(slider,avgvalue);
}
var sliders = document.querySelectorAll('.min-max-slider');
sliders.forEach( function(slider) {
init(slider);
});
* {padding: 0; margin: 0;}
body {padding: 40px;}
.min-max-slider {position: relative; width: 200px; text-align: center; margin-bottom: 50px;}
.min-max-slider > label {display: none;}
span.value {height: 1.7em; font-weight: bold; display: inline-block;}
span.value.lower::before {content: "€"; display: inline-block;}
span.value.upper::before {content: "- €"; display: inline-block; margin-left: 0.4em;}
.min-max-slider > .legend {display: flex; justify-content: space-between;}
.min-max-slider > .legend > * {font-size: small; opacity: 0.25;}
.min-max-slider > input {cursor: pointer; position: absolute;}
/* webkit specific styling */
.min-max-slider > input {
-webkit-appearance: none;
outline: none!important;
background: transparent;
background-image: linear-gradient(to bottom, transparent 0%, transparent 30%, silver 30%, silver 60%, transparent 60%, transparent 100%);
}
.min-max-slider > input::-webkit-slider-thumb {
-webkit-appearance: none; /* Override default look */
appearance: none;
width: 14px; /* Set a specific slider handle width */
height: 14px; /* Slider handle height */
background: #eee; /* Green background */
cursor: pointer; /* Cursor on hover */
border: 1px solid gray;
border-radius: 100%;
}
.min-max-slider > input::-webkit-slider-runnable-track {cursor: pointer;}
<div class="min-max-slider" data-legendnum="2">
<label for="min">Minimum price</label>
<input id="min" class="min" name="min" type="range" step="1" min="0" max="3000" />
<label for="max">Maximum price</label>
<input id="max" class="max" name="max" type="range" step="1" min="0" max="3000" />
</div>
Note that you should keep the step size to 1 to prevent the values to change due to redraws/redraw bugs.
View online at: https://codepen.io/joosts/pen/rNLdxvK

2022 - Accessible solution - 30 second solution to implement
This solution builds off of this answer by #JoostS. Accessibility is something none of the answers have focused on and that is a problem, so I built off of the above answer by making it more accessible & extensible since it had some flaws.
Usage is very simple:
Use the CDN or host the script locally: https://cdn.jsdelivr.net/gh/maxshuty/accessible-web-components/dist/simpleRange.min.js
Add this element to your template or HTML: <range-selector min-range="0" max-range="1000" />
Hook into it by listening for the range-changed event (or whatever event-name-to-emit-on-change you pass in)
That's it. View the full demo here. You can easily customize it by simply applying attributes like inputs-for-labels to use inputs instead of labels, slider-color to adjust the color, and so much more!
Here is a fiddle:
window.addEventListener('range-changed', (e) => {console.log(`Range changed for: ${e.detail.sliderId}. Min/Max range values are available in this object too`)})
<script src="https://cdn.jsdelivr.net/gh/maxshuty/accessible-web-components#latest/dist/simpleRange.min.js"></script>
<div>
<range-selector
id="rangeSelector1"
min-label="Minimum"
max-label="Maximum"
min-range="1000"
max-range="2022"
number-of-legend-items-to-show="6"
/>
</div>
<div>
<range-selector
id="rangeSelector1"
min-label="Minimum"
max-label="Maximum"
min-range="1"
max-range="500"
number-of-legend-items-to-show="3"
inputs-for-labels
/>
</div>
<div>
<range-selector
id="rangeSelector2"
min-label="Minimum"
max-label="Maximum"
min-range="1000"
max-range="2022"
number-of-legend-items-to-show="3"
slider-color="#6b5b95"
/>
</div>
<div>
<range-selector
id="rangeSelector3"
min-label="Minimum"
max-label="Maximum"
min-range="1000"
max-range="2022"
hide-label
hide-legend
/>
</div>
I decided to address the issues of the linked answer like the labels using display: none (bad for a11y), no visual focus on the slider, etc., and improve the code by cleaning up event listeners and making it much more dynamic and extensible.
I created this tiny library with many options to customize colors, event names, easily hook into it, make the accessible labels i18n capable and much more. Here it is in a fiddle if you want to play around.
You can easily customize the number of legend items it shows, hide or show the labels and legend, and customize the colors of everything, including the focus color like this.
Example using several of the props:
<range-selector
min-label="i18n Minimum Range"
max-label="i18n Maximum Range"
min-range="5"
max-range="555"
number-of-legend-items-to-show="6"
event-name-to-emit-on-change="my-custom-range-changed-event"
slider-color="orange"
circle-color="#f7cac9"
circle-border-color="#083535"
circle-focus-border-color="#3ec400"
/>
Then in your script:
window.addEventListener('my-custom-range-changed-event', (e) => { const data = e.detail; });
Finally if you see that this is missing something that you need I made it very easy to customize this library.
Simply copy this file and at the top you can see cssHelpers and constants objects that contain most of the variables you would likely want to further customize.
Since I built this with a Native Web Component I have taken advantage of disconnectedCallback and other hooks to clean up event listeners and set things up.

Here is a reusable double range slider implementation, base on tutorial Double Range Slider by Coding Artist
near native UI, Chrome/Firefox/Safari compatible
API EventTarget based, with change/input events, minGap/maxGap properties
let $ = (s, c = document) => c.querySelector(s);
let $$ = (s, c = document) => Array.prototype.slice.call(c.querySelectorAll(s));
class DoubleRangeSlider extends EventTarget {
#minGap = 0;
#maxGap = Number.MAX_SAFE_INTEGER;
#inputs;
style = {
trackColor: '#dadae5',
rangeColor: '#3264fe',
};
constructor(container){
super();
let inputs = $$('input[type="range"]', container);
if(inputs.length !== 2){
throw new RangeError('2 range inputs expected');
}
let [input1, input2] = inputs;
if(input1.min >= input1.max || input2.min >= input2.max){
throw new RangeError('range min should be less than max');
}
if(input1.max > input2.max || input1.min > input2.min){
throw new RangeError('input1\'s max/min should not be greater than input2\'s max/min');
}
this.#inputs = inputs;
let sliderTrack = $('.slider-track', container);
let lastValue1 = input1.value;
input1.addEventListener('input', (e) => {
let value1 = +input1.value;
let value2 = +input2.value;
let minGap = this.#minGap;
let maxGap = this.#maxGap;
let gap = value2 - value1;
let newValue1 = value1;
if(gap < minGap){
newValue1 = value2 - minGap;
}else if(gap > maxGap){
newValue1 = value2 - maxGap;
}
input1.value = newValue1;
if(input1.value !== lastValue1){
lastValue1 = input1.value;
passEvent(e);
fillColor();
}
});
let lastValue2 = input2.value;
input2.addEventListener('input', (e) => {
let value1 = +input1.value;
let value2 = +input2.value;
let minGap = this.#minGap;
let maxGap = this.#maxGap;
let gap = value2 - value1;
let newValue2 = value2;
if(gap < minGap){
newValue2 = value1 + minGap;
}else if(gap > maxGap){
newValue2 = value1 + maxGap;
}
input2.value = newValue2;
if(input2.value !== lastValue2){
lastValue2 = input2.value;
passEvent(e);
fillColor();
}
});
let passEvent = (e) => {
this.dispatchEvent(new e.constructor(e.type, e));
};
input1.addEventListener('change', passEvent);
input2.addEventListener('change', passEvent);
let fillColor = () => {
let overallMax = +input2.max;
let overallMin = +input1.min;
let overallRange = overallMax - overallMin;
let left1 = ((input1.value - overallMin) / overallRange * 100) + '%';
let left2 = ((input2.value - overallMin) / overallRange * 100) + '%';
let {trackColor, rangeColor} = this.style;
sliderTrack.style.background = `linear-gradient(to right, ${trackColor} ${left1}, ${rangeColor} ${left1}, ${rangeColor} ${left2}, ${trackColor} ${left2})`;
};
let init = () => {
let overallMax = +input2.max;
let overallMin = +input1.min;
let overallRange = overallMax - overallMin;
let range1 = input1.max - overallMin;
let range2 = overallMax - input2.min;
input1.style.left = '0px';
input1.style.width = (range1 / overallRange * 100) + '%';
input2.style.right = '0px';
input2.style.width = (range2 / overallRange * 100) + '%';
fillColor();
};
init();
}
get minGap(){
return this.#minGap;
}
set minGap(v){
this.#minGap = v;
}
get maxGap(){
return this.#maxGap;
}
set maxGap(v){
this.#maxGap = v;
}
get values(){
return this.#inputs.map((el) => el.value);
}
set values(values){
if(values.length !== 2 || !values.every(isFinite))
throw new RangeError();
let [input1, input2] = this.#inputs;
let [value1, value2] = values;
if(value1 > input1.max || value1 < input1.min)
throw new RangeError('invalid value for input1');
if(value2 > input2.max || value2 < input2.min)
throw new RangeError('invalid value for input2');
input1.value = value1;
input2.value = value2;
}
get inputs(){
return this.#inputs;
}
get overallMin(){
return this.#inputs[0].min;
}
get overallMax(){
return this.#inputs[1].max;
}
}
function main(){
let container = $('.slider-container');
let slider = new DoubleRangeSlider(container);
slider.minGap = 30;
slider.maxGap = 70;
let inputs = $$('input[name="a"]');
let outputs = $$('output[name="a"]');
outputs[0].value = inputs[0].value;
outputs[1].value = inputs[1].value;
slider.addEventListener('input', (e) => {
let values = slider.values;
outputs[0].value = values[0];
outputs[1].value = values[1];
});
slider.addEventListener('change', (e) => {
let values = slider.values;
console.log('change', values);
outputs[0].value = values[0];
outputs[1].value = values[1];
});
}
document.addEventListener('DOMContentLoaded', main);
.slider-container {
display: inline-block;
position: relative;
width: 360px;
height: 28px;
}
.slider-track {
width: 100%;
height: 5px;
position: absolute;
margin: auto;
top: 0;
bottom: 0;
border-radius: 5px;
}
.slider-container>input[type="range"] {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
position: absolute;
margin: auto;
top: 0;
bottom: 0;
width: 100%;
outline: none;
background-color: transparent;
pointer-events: none;
}
.slider-container>input[type="range"]::-webkit-slider-runnable-track {
-webkit-appearance: none;
height: 5px;
}
.slider-container>input[type="range"]::-moz-range-track {
-moz-appearance: none;
height: 5px;
}
.slider-container>input[type="range"]::-webkit-slider-thumb {
-webkit-appearance: none;
margin-top: -9px;
height: 1.7em;
width: 1.7em;
background-color: #3264fe;
cursor: pointer;
pointer-events: auto;
border-radius: 50%;
}
.slider-container>input[type="range"]::-moz-range-thumb {
-moz-appearance: none;
height: 1.7em;
width: 1.7em;
cursor: pointer;
border: none;
border-radius: 50%;
background-color: #3264fe;
pointer-events: auto;
}
.slider-container>input[type="range"]:active::-webkit-slider-thumb {
background-color: #ffffff;
border: 3px solid #3264fe;
}
<h3>Double Range Slider, Reusable Edition</h3>
<div class="slider-container">
<div class="slider-track"></div>
<input type="range" name="a" min="-130" max="-30" step="1" value="-100" autocomplete="off" />
<input type="range" name="a" min="-60" max="0" step="2" value="-30" autocomplete="off" />
</div>
<div>
<output name="a"></output> ~ <output name="a"></output>
</div>
<pre>
Changes:
1. allow different min/max/step for two inputs
2. new property 'maxGap'
3. added events 'input'/'change'
4. dropped IE/OldEdge support
</pre>

For those working with Vue, there is now Veeno available, based on noUiSlider. But it does not seem to be maintained anymore. :-(

This code covers following points
Dual slider using HTML, CSS, JS
I have modified this slider using embedded ruby so we can save previously applied values using params in rails.
<% left_width = params[:min].nil? ? 0 : ((params[:min].to_f/100000) * 100).to_i %>
<% left_value = params[:min].nil? ? '0' : params[:min] %>
<% right_width = params[:max].nil? ? 100 : ((params[:max].to_f/100000) * 100).to_i %>
<% right_value = params[:max].nil? ? '100000' : params[:max] %>
<div class="range-slider-outer">
<div slider id="slider-distance">
<div class="slider-inner">
<div inverse-left style="width:<%= left_width %>%;"></div>
<div inverse-right style="width:<%= 100 - right_width %>%;"></div>
<div range style="left:<%= left_width %>%;right:<%= 100 - right_width %>%;"></div>
<span thumb style="left:<%= left_width %>%;"></span>
<span thumb style="left:<%= right_width %>%;"></span>
<div sign style="">
Rs.<span id="value"><%= left_value.to_i %></span> to
</div>
<div sign style="">
Rs.<span id="value"><%= right_value.to_i %></span>
</div>
</div>
<input type="range" name="min" value=<%= left_value %> max="100000" min="0" step="100" oninput="
this.value=Math.min(this.value,this.parentNode.childNodes[5].value-1);
let value = (this.value/parseInt(this.max))*100
var children = this.parentNode.childNodes[1].childNodes;
children[1].style.width=value+'%';
children[5].style.left=value+'%';
children[7].style.left=value+'%';children[11].style.left=value+'%';
children[11].childNodes[1].innerHTML=this.value;" />
<input type="range" name="max" value=<%= right_value %> max="100000" min="0" step="100" oninput="
this.value=Math.max(this.value,this.parentNode.childNodes[3].value-(-1));
let value = (this.value/parseInt(this.max))*100
var children = this.parentNode.childNodes[1].childNodes;
children[3].style.width=(100-value)+'%';
children[5].style.right=(100-value)+'%';
children[9].style.left=value+'%';children[13].style.left=value+'%';
children[13].childNodes[1].innerHTML=this.value;" />
</div>
<div class="range-label">
<div>0</div>
<div>100000</div>
</div>
</div>
[slider] {
/*width: 300px;*/
position: relative;
height: 5px;
/*margin: 20px auto;*/
/* height: 100%; */
}
[slider] > div {
position: absolute;
left: 13px;
right: 15px;
height: 14px;
top: 5px;
}
[slider] > div > [inverse-left] {
position: absolute;
left: 0;
height: 14px;
border-radius: 3px;
background-color: #CCC;
/*margin: 0 7px;*/
margin: 0 -7px;
}
[slider] > div > [inverse-right] {
position: absolute;
right: 0;
height: 14px;
border-radius: 3px;
background-color: #CCC;
/*margin: 0 7px;*/
margin: 0 -7px;
}
[slider] > div > [range] {
position: absolute;
left: 0;
height: 14px;
border-radius: 14px;
background-color:#8950fc;
}
[slider] > div > [thumb] {
position: absolute;
top: -3px;
z-index: 2;
height: 20px;
width: 20px;
text-align: left;
margin-left: -11px;
cursor: pointer;
/* box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4); */
background-color: #FFF;
/*border-radius: 50%;*/
border-radius:2px;
outline: none;
}
[slider] > input[type=range] {
position: absolute;
pointer-events: none;
-webkit-appearance: none;
z-index: 3;
height: 14px;
top: -2px;
width: 100%;
opacity: 0;
}
div[slider] > input[type=range]:focus::-webkit-slider-runnable-track {
background: transparent;
border: transparent;
}
div[slider] > input[type=range]:focus {
outline: none;
}
div[slider] > input[type=range]::-webkit-slider-thumb {
pointer-events: all;
width: 28px;
height: 28px;
border-radius: 0px;
border: 0 none;
background: red;
-webkit-appearance: none;
}
div[slider] > input[type=range]::-ms-fill-lower {
background: transparent;
border: 0 none;
}
div[slider] > input[type=range]::-ms-fill-upper {
background: transparent;
border: 0 none;
}
div[slider] > input[type=range]::-ms-tooltip {
display: none;
}
[slider] > div > [sign] {
/* opacity: 0;
position: absolute;
margin-left: -11px;
top: -39px;
z-index:3;
background-color:#1a243a;
color: #fff;
width: 28px;
height: 28px;
border-radius: 28px;
-webkit-border-radius: 28px;
align-items: center;
-webkit-justify-content: center;
justify-content: center;
text-align: center;*/
color: #A5B2CB;
border-radius: 28px;
justify-content: center;
text-align: center;
display: inline-block;
margin-top: 12px;
font-size: 14px;
font-weight: bold;
}
.slider-inner{
text-align:center;
}
/*[slider] > div > [sign]:after {
position: absolute;
content: '';
left: 0;
border-radius: 16px;
top: 19px;
border-left: 14px solid transparent;
border-right: 14px solid transparent;
border-top-width: 16px;
border-top-style: solid;
border-top-color:#1a243a;
}*/
[slider] > div > [sign] > span {
font-size: 12px;
font-weight: 700;
line-height: 28px;
}
[slider]:hover > div > [sign] {
opacity: 1;
}
.range-label{
display: flex;
justify-content: space-between;
margin-top: 28px;
padding: 0px 5px;
}
.range-slider-outer{
width:calc(100% - 20px);
margin:auto;
margin-bottom: 10px;
margin-top: 10px;
}

Calculation Slider to increase after certain number

I have a slider that calculates (x * y) * 35. I want to make it so if (x * y) = >200 then it should be:
(x * y) * 35 + 5
But the calculations should only come after 200. For example:
x = 1
y = 50
z = 1750
x = 1
y = 200
z = 7000
x = 1
y = 201
z = 7040
So basically the number should increase by 35 until x * y = >200, then it should increase by 40.
This is my code:
html
<div class="slidecontainer">
<p>Elever: <span id="saleprice"></span></p>
<input type="range" min="0" max="100" value="1" class="slider" id="sale">
</div>
<div class="slidecontainer">
<p>Paket sålda: <span id="commission"></span></p>
<input type="range" min="0" max="200" value="1" class="slider" id="commission_range" step="1">
</div>
<div class="outputbox">
<p>Totalt: <span id="total_commission" ></span>:-</p>
</div>
css
.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;
}
.outputbox p{
padding-top:20px;
font-size:30px;
font-family: Dosis;
}
.slidecontainer p{
font-size: 25px;
font-family: Dosis;
}
JS
<script>
var comslider = document.getElementById("sale");
var comoutput = document.getElementById("saleprice");
var salep = document.getElementById("saleprice");
var comp = document.getElementById("commission");
var totalout = document.getElementById("total_commission");
var slider = document.getElementById("commission_range");
var output = document.getElementById("commission");
comoutput.innerHTML = comslider.value; // Display the default slider value
output.innerHTML = slider.value; // Display the default slider value
// Update the current slider value (each time you drag the slider handle)
comslider.oninput = function() {
comoutput.innerHTML = this.value;
calcTotalCommission();
}
// Update the current slider value (each time you drag the slider handle)
slider.oninput = function() {
output.innerHTML = this.value;
calcTotalCommission();
}
// Update the totalCommision number with current values
function calcTotalCommission(price, percentage) {
var total = parseInt(salep.innerHTML) * (parseFloat(comp.innerHTML) * 35);
totalout.innerHTML = total.toFixed(0);
}
</script>

Add an IF check after getting the total. If total is greater than 200, then run function again with multiple of 40, otherwise if not greater than 200 server total as normal.
var comslider = document.getElementById("sale");
var comoutput = document.getElementById("saleprice");
var salep = document.getElementById("saleprice");
var comp = document.getElementById("commission");
var totalout = document.getElementById("total_commission");
var slider = document.getElementById("commission_range");
var output = document.getElementById("commission");
comoutput.innerHTML = comslider.value; // Display the default slider value
output.innerHTML = slider.value; // Display the default slider value
// Update the current slider value (each time you drag the slider handle)
comslider.oninput = function() {
comoutput.innerHTML = this.value;
calcTotalCommission();
}
// Update the current slider value (each time you drag the slider handle)
slider.oninput = function() {
output.innerHTML = this.value;
calcTotalCommission();
}
// Update the totalCommision number with current values
function calcTotalCommission(price, percentage) {
var total = parseInt(salep.innerHTML) * (parseFloat(comp.innerHTML) * 35);
// Check if total is greater than 200 and get new total if so
if (total > 200) {
total = parseInt(salep.innerHTML) * (parseFloat(comp.innerHTML) * 40);
}
totalout.innerHTML = total.toFixed(0);
}
.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;
}
.outputbox p {
padding-top: 20px;
font-size: 30px;
font-family: Dosis;
}
.slidecontainer p {
font-size: 25px;
font-family: Dosis;
}
<div class="slidecontainer">
<p>Elever: <span id="saleprice"></span></p>
<input type="range" min="0" max="100" value="1" class="slider" id="sale">
</div>
<div class="slidecontainer">
<p>Paket sålda: <span id="commission"></span></p>
<input type="range" min="0" max="200" value="1" class="slider" id="commission_range" step="1">
</div>
<div class="outputbox">
<p>Totalt: <span id="total_commission"></span>:-</p>
</div>

How can I make a circular input type=color element?

I simply want to style an <input type="color"> element so that it's a circle without changing its on-click behavior.
My first approach was to just style it with CSS, but this requires the use of ::-webkit-color-swatch/::-moz-color-swatch which are non-standard features and have poor browser support.
const randomColor = () =>
'#' + ((1 << 24) * Math.random() | 0).toString(16).padStart(6, '0');
const color = document.querySelector('#color');
color.addEventListener('click', event => {
event.currentTarget.value = randomColor();
event.currentTarget.style.backgroundColor = event.currentTarget.value;
});
color.addEventListener('input', event => {
event.currentTarget.style.backgroundColor = event.currentTarget.value;
});
#color {
border-radius: 25px;
height: 50px;
padding: 0;
width: 50px;
}
#color::-webkit-color-swatch {
display: none;
}
#color::-moz-color-swatch {
display: none;
}
<input id="color" type="color">
My second approach was to hide the color selector and trigger its click handler from a div styled to look like a circle instead. The problem with this approach is that the event handler passed to the input element doesn't retain its x and y coordinates, so Chrome shows the color selector in the top left corner of the window rather than under the element.
const randomColor = () =>
'#' + ((1 << 24) * Math.random() | 0).toString(16).padStart(6, '0');
const div = document.querySelector('#div');
div.addEventListener('click', event => {
const selector = event.currentTarget.firstElementChild;
selector.value = randomColor();
// This doesn't pass the x and y coordinates.
selector.click();
// This alternative approach doesn't work either.
//selector.dispatchEvent(new MouseEvent(event.type, event));
event.currentTarget.style.backgroundColor = selector.value;
});
div.addEventListener('input', event => {
event.currentTarget.style.backgroundColor = event.currentTarget.firstElementChild.value;
});
#div {
border: 1px solid;
border-radius: 25px;
height: 50px;
padding: 0;
width: 50px;
}
#color {
display: none;
}
<div id="div">
<input id="color" type="color">
</div>
Is there a standards-compliant approach to this that doesn't break Chrome's placement of the color selector box?

Instead of hiding the native input using display: none, you can use opacity: 0 and maybe also pointer-events: none, so that the modal opens up in the position you want, in this case 8px below the circle:
const randomColor = () => '#' + ((1 << 24) * Math.random() | 0).toString(16).padStart(6, '0');
const div = document.querySelector('#div');
const input = document.querySelector('#color');
div.addEventListener('click', event => {
input.value = div.style.backgroundColor = randomColor();
input.click();
});
input.addEventListener('input', () => {
div.style.backgroundColor = input.value;
});
#div {
position: relative;
border: 1px solid;
border-radius: 25px;
height: 50px;
padding: 0;
width: 50px;
overflow: hidden;
}
#color {
position: absolute;
top: 0;
left: 0;
height: calc(100% + 8px);
width: 100%;
margin: 0;
padding: 0;
border: 0;
opacity: 0;
pointer-events: none;
}
<div id="div">
<input id="color" type="color">
</div>
Actually, as in this case, the native element is not hidden (it's just transparent), you can get rid of both pointer-events: none and selector.click():
const randomColor = () => '#' + ((1 << 24) * Math.random() | 0).toString(16).padStart(6, '0');
const div = document.querySelector('#div');
const input = document.querySelector('#color');
// This could also be input.addEventListener(...):
div.addEventListener('click', event => {
input.value = div.style.backgroundColor = randomColor();
});
input.addEventListener('input', () => {
div.style.backgroundColor = input.value;
});
#div {
position: relative;
border: 1px solid;
border-radius: 25px;
height: 50px;
padding: 0;
width: 50px;
overflow: hidden;
}
#color {
position: absolute;
top: 0;
left: 0;
height: calc(100% + 8px);
width: 100%;
margin: 0;
padding: 0;
border: 0;
opacity: 0;
}
<div id="div">
<input id="color" type="color">
</div>

By using <label> for our visible element, we don't need any JavaScript. The native input behavior is more or less preserved. That helps with accessibility too since it points user interaction to the actual input element that assistive technology can recognize.
#color {
opacity: 0;
position: absolute;
pointer-events: none;
height: 50px;
}
.colorBtn {
display: inline-block;
height: 50px;
width: 50px;
border-radius: 25px;
background: turquoise;
border: 1px solid grey;
}
/* you'll want to add some interaction styles */
.colorBtn:hover,
#color:focus + .colorBtn {
border-color: black;
}
#color:active + .colorBtn {
filter: brightness(90%);
}
<input id="color" type="color" />
<label class="colorBtn" for="color"><label/>

how to run javascript function 'live' without refresh?

im trying to make a average grade calculator, now thats is going fine but now i want to calculate the average immediately when a number gets inputted in one of the fields. I've been trying this with "on(), live(), onkeyup()" but can't get it to work.
The result of the average now displays beneath the inputfields 'onclick' on the button. I want the average displayed there but then as soon as you input numbers in one of the fields it should show there as it now does after the onclick.
What i've tryed with the 'on(), live(), onkeyup()' is to connect them to the input fields and connect them to the calculator() function.
Is there a easy way to do this or a other certain way?
greetings.
function calculator() {
var weight = 0;
var mark = 0;
var weights = document.querySelectorAll('[id^=weight-]');
var grades = document.querySelectorAll('[id^=mark-]');
var trs = document.getElementsByTagName('tr');
var tBody = document.getElementsByTagName('tbody')[0];
var totalWeight = 0;
var totalGrade = 0;
for (var i = 0; i < weights.length; i++) {
totalWeight += +weights[i].value;
}
for (var i = 0; i < grades.length; i++) {
totalGrade += +grades[i].value;
}
var finalGrade=totalGrade/totalWeight;
var display = document.getElementById('output-div');
var newTr = document.createElement('TR');
newTr.innerHTML = `<td><input id="weight-${trs.length + 1}" type="text" size=2 value=""></td><td><input id="mark-${trs.length + 1}" type="text" size=2 value=""></td>`;
tBody.appendChild(newTr);
display.innerHTML='Je gemiddelde is: ' +finalGrade.toFixed(2);
}
html {
background-color: ;
}
header {
background-color: ;
}
h2 {
text-align: center;
}
h3 {
text-align: center;
}
body {
font-family: 'Roboto', sans-serif;
}
table {
margin: auto;
}
tr {
background-color: ;
}
td {
background-color: ;
}
#table-title {
font-size: 20px;
font-style: italic;
text-align: center;
position: relative;
}
input {
text-align: center;
}
[id^="mark"] {
width: 100px;
}
[id^="weight"] {
width: 100px;
}
#calc-btn-div {
position: relative;
width: 150px;
margin: auto;
}
#calc-btn {
position: relative;
padding: 5px;
margin-top: 20px;
}
#calc-btn:hover {
border-color: black;
box-shadow: 8px 8px 8px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
}
/* #add-input-div {
height: 50px;
text-align: center;
width: 300px;
margin: auto;
margin-top: 20px;
}
#add-input-btn {
position: relative;
padding: 5px;
margin-top: 20px;
}
#add-input-btn:hover {
border-color: black;
box-shadow: 8px 8px 8px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
} */
#output-div {
background-color: ;
height: 50px;
text-align: center;
width: 300px;
margin: auto;
margin-top: 20px;
}
/* The Modal (background) */
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}
/* Modal Content/Box */
.modal-content {
background-color: #fefefe;
margin: 15% auto; /* 15% from the top and centered */
padding: 20px;
border: 1px solid #888;
width: 80%; /* Could be more or less, depending on screen size */
}
/* The Close Button */
.close {
color: #aaa;
float: right;
font-size: 28px;
font-weight: bold;
}
.close:hover,
.close:focus {
color: black;
text-decoration: none;
cursor: pointer;
}
<html>
<head>
<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
</head>
<header>
<h2>Gemiddelde cijfer</h2>
<h3>Voer hieronder je cijfers in</h3>
</header>
<body>
<table id="table">
<tr id="table-title">
<td>Weging</td>
<td>Cijfer</td>
</tr>
<tr>
<td><input id="weight-1" type="text" size=2 value=""></td>
<td><input id="mark-1" type="text" size=2 value=""></td>
</tr>
</table>
<div id="calc-btn-div">
<input id="calc-btn" type="button" value="Berekenen je gemiddelde" onclick="calculator()">
</div>
<!-- <div id="add-input-div">
<input id="add-input-btn" type="button" value="Voeg cijfer toe" onclick="addInput()">
</div> -->
<div id="output-div"></div>
</body>
</html>

Using vanilla JavaScript I would attach an eventListener to the inputfields like this
document.getElementById('weight-1').addEventListener('change',function(){
calculator();
});
document.getElementById('mark-1').addEventListener('change',function(){
calculator();
});
These addEventListener functions adds listeners to the "input" field's predefined 'change'-events, and fires the calculator(); function from your code.
Seeing that you are using some sort of dynamic generation of the inputfields, you could add the listeners to your inputfields using the same querySelector that you use to target them during calculation. It would mean replacing getElementById('weight-1') in my example above with querySelectorAll('[id^=weight-]') for the weight-fields.
Also, doing work with values, IO, and calculation between html and JavaScript, I would suggest using a library like jQuery. jQuery simplifies these processes a lot.
This is the documentation for the jQuery alternative onClick function:
https://api.jquery.com/change/

I think you could do that with an angularJS module. Take a look at this tutorial : https://www.w3schools.com/angular/angular_modules.asp
maybe it will help.

Style input range background before thumb

I want to style the bar before the thumb with a different color on a range input. I'v tried looking for a solution but I havent found a proper solution. This is what I need it to look like:
Chrome doesnt seem to support input[type='range']::-webkit-slider-thumb:before anymore and I am at a loss how to style it. Here's what I have so far:
input[type='range'] {
min-width: 100px;
max-width: 200px;
&::-webkit-slider-thumb {
-webkit-appearance: none !important;
background-color: #white;
border: 1px solid #gray-4;
height: 14px;
width: 14px;
&:hover,
&:focus,
&:active {
border-color: #blue;
background-color: #gray-2;
}
}
&::-webkit-slider-runnable-track {
background-color: #gray-2;
border: 1px solid #gray-4;
}
}

document.querySelectorAll(".__range").forEach(function(el) {
el.oninput =function(){
var valPercent = (el.valueAsNumber - parseInt(el.min)) /
(parseInt(el.max) - parseInt(el.min));
var style = 'background-image: -webkit-gradient(linear, 0% 0%, 100% 0%, color-stop('+ valPercent+', #29907f), color-stop('+ valPercent+', #f5f6f8));';
el.style = style;
};
el.oninput();
});
.__range{
margin:30px 0 20px 0;
-webkit-appearance: none;
background-color: #f5f6f8;
height: 3px;
width: 100%;
margin: 10px auto;
}
.__range:focus{
outline:none;
}
.__range::-webkit-slider-thumb{
-webkit-appearance: none;
width: 20px;
height: 20px;
background: #29907f;
border-radius: 50%;
cursor: -moz-grab;
cursor: -webkit-grab;
}
<input class="__range" id="rng" name="rng" value="30" type="range" max="100" min="1" value="100" step="1">

The trick in the post referenced by shambalambala is clever, but I don't think it will work in this case if you want to get something that looks exactly like the image you show. The approach there is to put a shadow on the thumb to create the different coloring to the left of the thumb. Since the shadow extends in the vertical, as well as the horizontal, direction, you also have to add overflow:hidden to the range or the track in order to clip the shadow. Unfortunately, this also clips the thumb. So if you want a thumb that extends beyond the track in the vertical dimension, such as in the image you show where the thumb is a circle with a diameter larger than the track width, this won't work.
I'm not sure there's a pure CSS solution to this problem. With JavaScript, one way around this is to make two range elements that overlap exactly. For one range element, you will see only the thumb and for one you will see only the track. You can use the shadow approach on the track element to get the different color before the thumb. You can style the thumb on the thumb range however you want, and since overflow is not set to hidden for this range element, it can extend beyond the width of the track. You can then use JavaScript to yoke the two range elements together, so that when you move the thumb on the thumb-visible element, the value of the track-visible element also changes.
For example (works in webkit browsers--will need some additional styling for other browsers):
<html>
<head>
<style>
.styled_range {
position: relative;
padding: 10px;
}
input[type=range] {
-webkit-appearance: none;
width: 600px;
background: transparent;
position: absolute;
top: 0;
left: 0;
}
input[type=range]::-webkit-slider-thumb {
-webkit-appearance: none;
}
input[type=range]:focus {
outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
width: 100%;
height: 12px;
}
.track_range {
pointer-events: none;
}
.track_range::-webkit-slider-runnable-track {
background: #D0D0D0;
border-radius: 6px;
overflow: hidden;
}
.track_range::-webkit-slider-thumb {
-webkit-appearance: none;
background: transparent;
height: 1px;
width: 1px;
box-shadow: -600px 0 0 600px #666666;
}
.thumb_range::-webkit-slider-runnable-track {
background: transparent;
cursor: pointer;
}
.thumb_range::-webkit-slider-thumb {
-webkit-appearance: none;
border: 3px solid #ffffff;
border-radius: 20px;
height: 40px;
width: 40px;
background: #1180AD;
cursor: pointer;
margin: -12px 0px 0px 0px;
}
</style>
</head>
<body>
<form>
<div class="styled_range">
<input type="range" class="track_range"/>
<input type="range" class="thumb_range"/>
</div>
<br/>
<div class="styled_range">
<input type="range" class="track_range"/>
<input type="range" class="thumb_range"/>
</div>
</form>
</body>
<script>
window.onload = function() {
var styledRanges = document.getElementsByClassName('styled_range');
for (var i=0; i<styledRanges.length; i++) {
var thumbRange = null, trackRange = null;
for (var j=0; j<styledRanges[i].children.length; j++) {
var child = styledRanges[i].children[j];
if (child.className === 'thumb_range')
var thumbRange = child;
else if (child.className === 'track_range')
var trackRange = child;
}
thumbRange.oninput = function(thumbRange, trackRange) {
return function(e) {
trackRange.value = thumbRange.value;
};
}(thumbRange, trackRange);
}
}
</script>
</html>

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