[html] HTML5 input type range show range value

I have a solution that involves (Vanilla) JavaScript, but only as a library. You habe to include it once and then all you need to do is set the appropriate source attribute of the number inputs.

The source attribute should be the querySelectorAll selector of the range input you want to listen to.

It even works with selectcs. And it works with multiple listeners. And it works in the other direction: change the number input and the range input will adjust. And it will work on elements added later onto the page (check https://codepen.io/HerrSerker/pen/JzaVQg for that)

Tested in Chrome, Firefox, Edge and IE11

_x000D_
_x000D_
;(function(){_x000D_
  _x000D_
  function emit(target, name) {_x000D_
    var event_x000D_
    if (document.createEvent) {_x000D_
      event = document.createEvent("HTMLEvents");_x000D_
      event.initEvent(name, true, true);_x000D_
    } else {_x000D_
      event = document.createEventObject();_x000D_
      event.eventType = name;_x000D_
    }_x000D_
_x000D_
    event.eventName = name;_x000D_
_x000D_
    if (document.createEvent) {_x000D_
      target.dispatchEvent(event);_x000D_
    } else {_x000D_
      target.fireEvent("on" + event.eventType, event);_x000D_
    }    _x000D_
  }_x000D_
_x000D_
  var outputsSelector = "input[type=number][source],select[source]";_x000D_
  _x000D_
  function onChange(e) {_x000D_
    var outputs = document.querySelectorAll(outputsSelector)_x000D_
    for (var index = 0; index < outputs.length; index++) {_x000D_
      var item = outputs[index]_x000D_
      var source = document.querySelector(item.getAttribute('source'));_x000D_
      if (source) {_x000D_
        if (item === e.target) {_x000D_
          source.value = item.value_x000D_
          emit(source, 'input')_x000D_
          emit(source, 'change')_x000D_
        }_x000D_
_x000D_
        if (source === e.target) {_x000D_
          item.value = source.value_x000D_
        }_x000D_
      }_x000D_
    }_x000D_
  }_x000D_
  _x000D_
  document.addEventListener('change', onChange)_x000D_
  document.addEventListener('input', onChange)_x000D_
}());
_x000D_
<div id="div">_x000D_
  <input name="example" type="range" max="2250000" min="-200000" value="0" step="50000">_x000D_
  <input id="example-value" type="number" max="2250000" min="-200000" value="0" step="50000" source="[name=example]">_x000D_
  <br>_x000D_
_x000D_
  <input name="example2" type="range" max="2240000" min="-160000" value="0" step="50000">_x000D_
  <input type="number" max="2240000" min="-160000" value="0" step="50000" source="[name=example2]">_x000D_
  <input type="number" max="2240000" min="-160000" value="0" step="50000" source="[name=example2]">_x000D_
  <br>_x000D_
  _x000D_
  <input name="example3" type="range" max="20" min="0" value="10" step="1">_x000D_
  <select source="[name=example3]">_x000D_
    <option value="0">0</option>_x000D_
    <option value="1">1</option>_x000D_
    <option value="2">2</option>_x000D_
    <option value="3">3</option>_x000D_
    <option value="4">4</option>_x000D_
    <option value="5">5</option>_x000D_
    <option value="6">6</option>_x000D_
    <option value="7">7</option>_x000D_
    <option value="8">8</option>_x000D_
    <option value="9">9</option>_x000D_
    <option value="10">10</option>_x000D_
    <option value="11">11</option>_x000D_
    <option value="12">12</option>_x000D_
    <option value="13">13</option>_x000D_
    <option value="14">14</option>_x000D_
    <option value="15">15</option>_x000D_
    <option value="16">16</option>_x000D_
    <option value="17">17</option>_x000D_
    <option value="18">18</option>_x000D_
    <option value="19">19</option>_x000D_
    <option value="20">20</option>_x000D_
  </select>_x000D_
  <br>_x000D_
  _x000D_
</div>_x000D_
<br>
_x000D_
_x000D_
_x000D_

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