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Slider

This handy lil slider is perfect for setting specific values within a range.

Basics

Create a slider by adding the class .slider and the attribute data-slider to a container element. You should also define both a starting and maximum value for the slider.

Inside the container are three elements:

  • The handle (.slider-handle), which the user drags.
  • The fill (.slider-fill), which resizes dynamically based on where the handle is.
  • A hidden <input>, which is where the value of the slider is stored.

The data-initial-start="" value is where along the slider the handle starts. The data-end="" is the maximum value for the slider. In the below example, starting at 50 of 200 means the slider handle will start at 25% of the total.

Watch this part in video

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<div class="slider" data-slider data-initial-start="50" data-end="200">
  <span class="slider-handle"  data-slider-handle role="slider" tabindex="1"></span>
  <span class="slider-fill" data-slider-fill></span>
  <input type="hidden">
</div>

Vertical

To get vertical, just add a .vertical class and data-vertical="true" the slider.

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<div class="slider vertical" data-slider data-initial-start="25" data-end="200" data-vertical="true">
  <span class="slider-handle" data-slider-handle role="slider" tabindex="1"></span>
  <span class="slider-fill" data-slider-fill></span>
  <input type="hidden">
</div>

Disabled

Add the class .disabled to disable interaction with the slider.

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<div class="slider disabled" data-slider data-initial-start="78">
  <span class="slider-handle" data-slider-handle role="slider" tabindex="1"></span>
  <span class="slider-fill" data-slider-fill></span>
  <input type="hidden">
</div>

Two Handles

Two-handle sliders can be used to define a range of values, versus a single value. To make a two-handle slider, add a second handle, and a second <input>. This works with horizontal and vertical sliders.

You can add IDs to the <input>s inside the sliders to make it easier to access the values. If you don’t, the plugin will add an ID to each for you.

Note that the first handle manipulates the first <input>, while the second handle manipulates the second <input>.

Watch this part in video

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<div class="slider" data-slider data-initial-start="25" data-initial-end="75">
  <span class="slider-handle" data-slider-handle role="slider" tabindex="1"></span>
  <span class="slider-fill" data-slider-fill></span>
  <span class="slider-handle" data-slider-handle role="slider" tabindex="1"></span>
  <input type="hidden">
  <input type="hidden">
</div>

Data Binding

Data binding allows you to connect the slider to an external <input> field. With data binding set up, dragging the handle will change the value inside the text field, and editing the number in the text field will move the slider in real-time.

To set it all up, create an <input> with an ID and add aria-controls="id" to the slider handle, where id is the ID of the <input>.

Watch this part in video

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<div class="grid-x grid-margin-x">
  <div class="cell small-10">
    <div class="slider" data-slider data-initial-start="50">
      <span class="slider-handle"  data-slider-handle role="slider" tabindex="1" aria-controls="sliderOutput1"></span>
      <span class="slider-fill" data-slider-fill></span>
    </div>
  </div>
  <div class="cell small-2">
    <input type="number" id="sliderOutput1">
  </div>
</div>

Or with a step size:

<div class="grid-x grid-margin-x">
  <div class="cell small-10">
    <div class="slider" data-slider data-initial-start="50" data-step="5">
      <span class="slider-handle"  data-slider-handle role="slider" tabindex="1" aria-controls="sliderOutput2"></span>
      <span class="slider-fill" data-slider-fill></span>
    </div>
  </div>
  <div class="cell small-2">
    <input type="number" id="sliderOutput2">
  </div>
</div>

Native Range Slider

In Foundation 6.2, we introduced styles for <input type="range">, the native HTML element for range sliders. It’s not supported in every browser, namely IE9 and some older mobile browsers. View browser support for the range input type.

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<input type="range" min="1" max="100" step="1">

If you’re using the Sass version of Foundation, add this line to your main Sass file:

@include foundation-range-input;

It’s possible to use both the JavaScript slider and the native slider in the same codebase, as the CSS selectors used don’t overlap. Here’s what’s different about the native slider:

  • Less markup: just write <input type="range"> and you’re good.
  • No JavaScript is needed, which guarantees it runs faster in most browsers.
  • To disable the slider, add disabled as an attribute, instead of a class.
  • No support for vertical orientation.
  • No support for two handles.

Non-linear value translation

Sometimes not every value is of equal importance. In the example below, the slider focusses on the higher numbers by adding a log-type position value function. Alternatively there is also a pow-type position value function available, making the reverse possible.

The nonLinearBase-option is optional and defaults to 5.

<div class="grid-x grid-margin-x">
  <div class="cell small-10">
    <div class="slider" data-slider data-initial-start="50" data-step="1" data-position-value-function="log" data-non-linear-base="5">
      <span class="slider-handle" data-slider-handle role="slider" tabindex="1" aria-controls="sliderOutputNonLinear"></span>
    </div>
  </div>
  <div class="cell small-2">
    <input type="number" id="sliderOutputNonLinear">
  </div>
</div>

Reflow

The slider takes into account the width of the handles when calculating how to display itself. This means that if the slider is initially hidden, or hidden while the value is adjusted, the resulting visual will be slightly different because the width of the handle is indeterminate. If this is problematic, you can use JavaScript to cause the slider to reflow at the time that you change it from being hidden. Example:

$('#my-slider').show();
$('#my-slider').foundation('_reflow');