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UI libraries / InstantSearch.js / Widgets

rangeSlider

Signature 
rangeSlider({
  container: string|HTMLElement,
  attribute: string,
  // Optional parameters
  min: number,
  max: number,
  precision: number,
  step: number,
  pips: boolean,
  tooltips: boolean|object,
  cssClasses: object,
});
Import
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import { rangeSlider } from 'instantsearch.js/es/widgets';
See code examples
See live example

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

Options

Parameter Description
container
type: string|HTMLElement
Required

The CSS Selector or HTMLElement to insert the widget into.
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rangeSlider({
  // ...
  container: '#range-slider',
});
attribute
type: string
Required

The name of the attribute in the record.
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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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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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rangeSlider({
  // ...
  max: 500,
});
precision
type: number
default: 0
Optional

The number of digits after the decimal point to use.

Use a negative value to round values to powers of 10.

For example, a precision of -2 would round a number to the nearest hundred, while a precision of -3 would round it to the nearest thousand.
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// Round values to 2 digits after the decimal point
rangeSlider({
  // ...
  precision: 2,
});

// Round values to the nearest hundred
rangeSlider({
  // ...
  precision: -2,
});
step
type: number
Optional

The number of steps between each handle move.
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rangeSlider({
  // ...
  step: 5,
});
pips
type: boolean
Optional

Whether to show slider pips.
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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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rangeSlider({
  // ...
  tooltips: false,
});
cssClasses
type: object
default: {}
Optional

The CSS classes you can 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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rangeSlider({
  // ...
  cssClasses: {
    root: 'MyCustomrangeSlider',
    handle: [
      'MyCustomrangeSliderHandle',
      'MyCustomrangeSliderHandle--subclass',
    ],
  },
});

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>

Customize the UI with 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

To use connectRange, you can import it with the declaration relevant to how you installed InstantSearch.js.

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import { connectRange } from 'instantsearch.js/es/connectors';

Then it’s a 3-step process:

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

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

// 3. Instantiate
search.addWidgets([
  customRangeSlider({
    // instance params
  })
]);

See code examples

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,
    boolean canRefine,
    function refine,
    function sendEvent,
    object widgetParams,
  } = renderOptions;

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

  // Render the widget
}

Rendering options

Parameter Description
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'}"
    />
  `;
};
canRefine
type: boolean
Required

Indicates if search state can be refined.
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const renderRangeSlider = (renderOptions, isFirstRender) => {
  const { canRefine } = renderOptions;

  if (!canRefine) {
    document.querySelector('#range-slider').innerHTML = '';
    return;
  }
};
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';
};
sendEvent
type: (eventType, facetValue) => void

The function to send click events. The click event is automatically sent when refine is called. You can learn more about the insights middleware.

  • eventType: 'click'
  • facetValue: string
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// For example,
sendEvent('click', [10, 30]);

/*
  A payload like the following will be sent to the `insights` middleware.
  {
    eventType: 'click',
    insightsMethod: 'clickedFilters',
    payload: {
      eventName: 'Filter Applied',
      filters: ['price>=10', 'price<=30'],
      index: '',
    },
    widgetType: 'ais.range',
  }
*/
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.addWidgets([
  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 = connectRange(
  renderRangeSlider
);

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

Instance options

Parameter Description
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.

Use a negative value to round values to powers of 10.

For example, a precision of -2 would round a number to the nearest hundred, while a precision of -3 would round it to the nearest thousand.
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// Round values to 2 digits after the decimal point
customRangeSlider({
  // ...
  precision: 2,
});

// Round values to the nearest hundred
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 customRangeSlider = connectRange(
  renderRangeSlider
);

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