API Reference / InstantSearch.js Widgets / rangeSlider
Apr. 11, 2019

rangeSlider

Widget signature
instantsearch.widgets.rangeSlider({
  container: string|HTMLElement,
  attribute: string,
  // Optional parameters
  min: number,
  max: number,
  precision: number,
  step: number,
  pips: boolean,
  tooltips: boolean|object,
  cssClasses: object,
});

About this widget

The rangeSlider widget provides a user-friendly way to filter the results, based on a single numeric range.

Requirements

The attribute provided to the widget must be added in attributes for faceting, either on the dashboard or using attributesForFaceting with the API. The values inside attribute must be numbers, not strings.

Examples

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instantsearch.widgets.rangeSlider({
  container: '#range-slider',
  attribute: 'price',
});

Options

container
type: string|HTMLElement
Required

The CSS Selector or HTMLElement to insert the widget into.

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instantsearch.widgets.rangeSlider({
  // ...
  container: '#range-slider',
});
attribute
type: string
Required

The name of the attribute in the record.

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instantsearch.widgets.rangeSlider({
  // ...
  attribute: 'price',
});
min
type: number
Optional

The minimum value for the input. When not provided, the minimum value is automatically computed by Algolia from the data in the index.

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instantsearch.widgets.rangeSlider({
  // ...
  min: 10,
});
max
type: number
Optional

The maximum value for the input. When not provided, the maximum value is automatically computed by Algolia from the data in the index.

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instantsearch.widgets.rangeSlider({
  // ...
  max: 500,
});
precision
type: number
default: 0
Optional

The number of digits after the decimal point to use.

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instantsearch.widgets.rangeSlider({
  // ...
  precision: 2,
});
step
type: number
Optional

The number of steps between each handle move.

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instantsearch.widgets.rangeSlider({
  // ...
  step: 5,
});
pips
type: boolean
Optional

Whether to show slider pips.

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instantsearch.widgets.rangeSlider({
  // ...
  pips: false,
});
tooltips
type: boolean|object
Optional

Whether to show tooltips. The default tooltips show the raw value. You can also provide an object with a format function.

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instantsearch.widgets.rangeSlider({
  // ...
  tooltips: false,
});
cssClasses
type: object
default: {}
Optional

The CSS classes to override.

  • root: the root element of the widget.
  • handle: the handle elements.
  • lowerHandle: the handle for the minimum value.
  • upperHandle: the handle for the maximum value.
  • tooltip: the tooltip elements.
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instantsearch.widgets.rangeSlider({
  // ...
  cssClasses: {
    root: 'MyCustomrangeSlider',
    handle: [
      'MyCustomrangeSliderHandle',
      'MyCustomrangeSliderHandle--subclass',
    ],
  },
});

Customize the UI - connectRange

If you want to create your own UI of the rangeSlider widget, you can use connectors.

This connector is also used to build other widgets: RangeInput

It’s a 3-step process:

// 1. Create a render function
const renderRangeSlider = (renderOptions, isFirstRender) => {
  // Rendering logic
};

// 2. Create the custom widget
const customRangeSlider = instantsearch.connectors.connectRange(
  renderRangeSlider
);

// 3. Instantiate
search.addWidget(
  customRangeSlider({
    // instance params
  })
);

Create a render function

This rendering function is called before the first search (init lifecycle step) and each time results come back from Algolia (render lifecycle step).

const renderRangeSlider = (renderOptions, isFirstRender) => {
  const {
    number[] start,
    object range,
    function refine,
    object widgetParams,
  } = renderOptions;

  if (isFirstRender) {
    // Do some initial rendering and bind events
  }

  // Render the widget
}

Rendering options

start
type: number[]

The current value for the refinement, with start[0] as the minimum value and start[1] as the maximum value.

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const renderRangeSlider = (renderOptions, isFirstRender) => {
  const { start } = renderOptions;

  document.querySelector('#range-slider').innerHTML = `
    <input type="range" value="${Number.isFinite(start[0]) ? start[0] : '0'}" />
  `;
};
range
type: object

The current available value for the range.

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const renderRangeSlider = (renderOptions, isFirstRender) => {
  const { start, range } = renderOptions;

  document.querySelector('#range-slider').innerHTML = `
    <input
      type="range"
      min="${range.min}"
      max="${range.max}"
      value="${Number.isFinite(start[0]) ? start[0] : '0'}"
    />
  `;
};
refine
type: function

Sets a range to filter the results on. Both values are optional, and default to the higher and lower bounds. You can use undefined to remove a previously set bound or to set an infinite bound.

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const renderRangeSlider = (renderOptions, isFirstRender) => {
  const { start, range, refine } = renderOptions;
  const container = document.querySelector('#range-slider');

  if (isFirstRender) {
    const input = document.createElement('input');
    input.type = 'range';

    input.addEventListener('change', event => {
      refine([parseFloat(event.currentTarget.value)]);
    });

    container.appendChild(input);

    return;
  }

  const input = container.querySelector('input');

  input.min = range.min;
  input.max = range.max;
  input.value = Number.isFinite(start[0]) ? start[0] : '0';
};
widgetParams
type: object

All original widget options forwarded to the render function.

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const renderRangeSlider = (renderOptions, isFirstRender) => {
  const { widgetParams } = renderOptions;

  widgetParams.container.innerHTML = '...';
};

// ...

search.addWidget(
  customRangeSlider({
    container: document.querySelector('#range-slider'),
  })
);

Create and instantiate the custom widget

We first create custom widgets from our rendering function, then we instantiate them. When doing that, there are two types of parameters you can give:

  • Instance parameters: they are predefined parameters that you can use to configure the behavior of Algolia.
  • Your own parameters: to make the custom widget generic.

Both instance and custom parameters are available in connector.widgetParams, inside the renderFunction.

const customRangeSlider = instantsearch.connectors.connectRange(
  renderRangeSlider
);

search.addWidget(
  customRangeSlider({
    attribute: string,
    // Optional parameters
    min: number,
    max: number,
    precision: number,
  })
);

Instance options

attribute
type: string
Required

The name of the attribute in the record.

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customRangeSlider({
  attribute: 'price',
});
min
type: number
Optional

The minimum value for the input. When not provided, the minimum value is automatically computed by Algolia from the data in the index.

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customRangeSlider({
  // ...
  min: 10,
});
max
type: number
Optional

The maximum value for the input. When not provided, the maximum value is automatically computed by Algolia from the data in the index.

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customRangeSlider({
  // ...
  max: 500,
});
precision
type: number
default: 0
Optional

The number of digits after the decimal point to use.

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customRangeSlider({
  // ...
  precision: 2,
});

Full example

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// Create the render function
const renderRangeSlider = (renderOptions, isFirstRender) => {
  const { start, range, refine, widgetParams } = renderOptions;

  if (isFirstRender) {
    const input = document.createElement('input');
    input.type = 'range';

    input.addEventListener('change', event => {
      refine([parseFloat(event.currentTarget.value)]);
    });

    widgetParams.container.appendChild(input);

    return;
  }

  const input = widgetParams.container.querySelector('input');

  input.min = range.min;
  input.max = range.max;
  input.value = Number.isFinite(start[0]) ? start[0] : '0';
};

// Create the custom widget
const customRangeSider = instantsearch.connectors.connectRange(
  renderRangeSlider
);

// Instantiate the custom widget
search.addWidget(
  customRangeSider({
    container: document.querySelector('#range-slider'),
    attribute: 'price',
  })
);

HTML output

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<div class="ais-RangeSlider">
  <div class="rheostat rheostat-horizontal" style="position: relative;">
    <div class="rheostat-background"></div>
    <div class="rheostat-handle rehostat-handle--lower" aria-valuemax="5000" aria-valuemin="1" aria-valuenow="750" aria-disabled="false" data-handle-key="0" role="slider" tabindex="0" style="left: 15%; position: absolute;">
      <div class="rheostat-tooltip">$750</div>
    </div>
    <div class="rheostat-handle rheostat-handle--upper" aria-valuemax="5000" aria-valuemin="750" aria-valuenow="5000" aria-disabled="false" data-handle-key="1" role="slider" tabindex="0" style="left: 100%; position: absolute;">
      <div class="rheostat-tooltip">$5,000</div>
    </div>
    <div class="rheostat-progress" style="left: 15%; width: 85%;"></div>
    <div class="rheostat-marker rheostat-marker--large" style="left: 0%; position: absolute; margin-left: 0px;">
      <div class="rheostat-value">1</div>
    </div>
    <div class="rheostat-marker" style="left: 2.94118%; position: absolute; margin-left: 0px;"></div>
    <!-- ... -->
    <div class="rheostat-marker" style="left: 97.0588%; position: absolute; margin-left: 0px;"></div>
    <div class="rheostat-marker rheostat-marker--large" style="left: 100%; position: absolute; margin-left: -1px;">
      <div class="rheostat-value">5,000</div>
    </div>
  </div>
</div>

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