ngRangeSlider

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Multi-handle range slider utilising the native HTML5 input range elements.

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ngRangeSlider
===================

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* **Heroku**: [http://ng-range-slider.herokuapp.com/](http://ng-range-slider.herokuapp.com/)
* **Bower:** `bower install ng-range-slider`

`ngRangeSlider` is an experimental module for two reasons: it uses the [`input range`](http://caniuse.com/#search=range) element &ndash; and secondly, `ngRangeSlider` goes one step further to stack each `input` using special CSS selectors.

I created the module due to an observation on the limitation of `input range` elements &ndash; they are restricted to only one handle. Essentially `ngRangeSlider` is a HTML5 implementation of [jQuery's range slider](http://jqueryui.com/slider/#range).

---

# Getting Started

With `ngRangeSlider` the CSS is just as important as the JavaScript. Without the CSS the `input range` elements will still have a direct relationship, but they will not be stacked.

For the styles please refer to the `Default.css` document in the example, as this provides a fairly comprehensive list of the styles to be applied to the `input range` elements.

`ngRangeSlider` is a typical Angular directive which requires an `ng-model` attribute which it will write the range to in the form of `{ from: 0, to: 10 }`.

```html
<section data-range-slider ng-model="range"></section>
```

You're also able to apply the `min`, `max`, and `step` attributes &ndash; and these may also be changed after the directive has been initialised.

```html
<section data-range-slider ng-model="range" min="minValue" max="maxValue"></section>
```

Each and every time the value of the range has been updated the `ng-model` will be updated. In our case using the example above it will write to `$scope.range`.

```html
Current range is {{range.from}} to {{range.to}}!
```

# Throttling

`ngRangeSlider` also supports the concept of event throttling. For example, when you're dragging the slider, the `ng-model` is updated with every change. However when you're implementing a feature such as fast filtering, you may wish to throttle the updating of `ng-model` to prevent excessive AJAX requests and/or WebSocket events. By specifying the `throttle` attribute in milliseconds you can achieve this:

```html
<section data-range-slider ng-model="range" throttle="1500"></section>
```

In the above example, the `ng-model` will only be updated every **1,500 milliseconds**. You need to have either [Underscore.js](http://underscorejs.org/) or [Lo-Dash](http://lodash.com/) installed.

ngRangeSlider

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