API Reference / InstantSearch.js Widgets / currentRefinements
Apr. 24, 2019

currentRefinements

Widget signature 
instantsearch.widgets.currentRefinements({
  container: string|HTMLElement,
  // Optional parameters
  includedAttributes: string[],
  excludedAttributes: string[],
  cssClasses: object,
  transformItems: function,
});
See code examples
See Live example

About this widget

The currentRefinements widget displays a list of refinements applied to the search.

Examples

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instantsearch.widgets.currentRefinements({
  container: '#current-refinements',
});

Options

container
type: string|HTMLElement
Required

The CSS Selector or HTMLElement to insert the widget into.
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instantsearch.widgets.currentRefinements({
  container: '#current-refinements',
});
includedAttributes
type: string[]
default: []
Optional

The attributes to include in the widget (all by default). Cannot be used with excludedAttributes. In the example below, only the categories attribute is included in the widget.
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instantsearch.widgets.currentRefinements({
  // ...
  includedAttributes: ['categories'],
});
excludedAttributes
type: string[]
default: ["query"]
Optional

The attributes to exclude from the widget. Cannot be used with includedAttributes. In the example below, the brand attribute is excluded from the widget.
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instantsearch.widgets.currentRefinements({
  // ...
  excludedAttributes: ['brand'],
});
cssClasses
type: object
default: {}
Optional

The CSS classes to override.

  • root: the root element of the widget.
  • list: the list element.
  • item: the list items.
  • label: the label element of each item.
  • category: the container of each item value.
  • categoryLabel: the text element of each item value.
  • delete: the button element of eatch item value.
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instantsearch.widgets.currentRefinements({
  // ...
  cssClasses: {
    root: 'MyCustomCurrentRefinements',
    list: [
      'MyCustomCurrentRefinementsList',
      'MyCustomCurrentRefinementsList--subclass',
    ],
  },
});
transformItems
type: function
default: x => x
Optional

Receives the items, and is called before displaying them. Should return a new array with the same shape as the original array. Useful for mapping over the items to transform, and remove or reorder them.
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instantsearch.widgets.currentRefinements({
  // ...
  transformItems(items) {
    return items.filter(item => item.attribute !== 'brand');
  },
});

Customize the UI - connectCurrentRefinements

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

It’s a 3-step process:

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

// 2. Create the custom widget
const customCurrentRefinements = instantsearch.connectors.connectCurrentRefinements(
  renderCurrentRefinements
);

// 3. Instantiate
search.addWidget(
  customCurrentRefinements({
    // 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 renderCurrentRefinements = (renderOptions, isFirstRender) => {
  const {
    object[] items,
    function refine,
    function createURL,
    object widgetParams,
  } = renderOptions;

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

  // Render the widget
}

Rendering options

items
type: object[]

All the currently refined items, grouped by attribute.

With each item:

  • attribute: string: the attribute on which the refinement is applied.
  • label: string: The textual representation of this attribute.
  • refine: function: removes the refinement.
  • refinements: object[]: currently applied refinements.

With each refinement:

  • type: 'facet' | 'exclude' | 'disjunctive' | 'hierarchical' | 'numeric' | 'query': the type of the refinement.
  • attribute: string: the attribute on which the refinement is applied.
  • label: string: the label of the refinement to display.
  • value: string: the raw value of the refinement.
  • operator?: string: the value of the operator (only if applicable).
  • exhaustive?: boolean: whether the count is exhaustive (only if applicable).
  • count?: number: the number of found items (only if applicable).
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const renderListItem = item => `
  <li>
    ${item.attribute}
    <ul>
      ${item.refinements
        .map(refinement => `<li>${refinement.value} (${refinement.count})</li>`)
        .join('')}
    </ul>
  </li>
`;

const renderCurrentRefinements = (renderOptions, isFirstRender) => {
  const { items } = renderOptions;

  document.querySelector('#current-refinements').innerHTML = `
    <ul>
      ${items.map(renderListItem).join('')}
    </ul>
  `;
};
refine
type: function

Clears a single refinement and triggers a new search.
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const createDataAttribtues = refinement =>
  Object.keys(refinement)
    .map(key => `data-${key}="${refinement[key]}"`)
    .join(' ');

const renderListItem = item => `
  <li>
    ${item.label}
    <ul>
      ${item.refinements
        .map(
          refinement =>
            `<li>
              ${refinement.label} (${refinement.count})
              <button ${createDataAttribtues(refinement)}>X</button>
            </li>`
        )
        .join('')}
    </ul>
  </li>
`;

const renderCurrentRefinements = (renderOptions, isFirstRender) => {
  const { items, refine } = renderOptions;

  const container = document.querySelector('#current-refinements');

  container.innerHTML = `
    <ul>
      ${items.map(renderListItem).join('')}
    </ul>
  `;

  [...container.querySelectorAll('button')].forEach(element => {
    element.addEventListener('click', event => {
      const item = Object.keys(event.currentTarget.dataset).reduce(
        (acc, key) => ({
          ...acc,
          [key]: event.currentTarget.dataset[key],
        }),
        {}
      );

      refine(item);
    });
  });
};
createURL
type: function

Generates a URL for the next state.
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const renderListItem = ({ item, createURL }) => `
  <li>
    ${item.label}
    <ul>
      ${item.refinements
        .map(
          refinement =>
            `<li>
              <a href="${createURL(refinement)}">
                ${refinement.label} (${refinement.count})
              </a>
            </li>`
        )
        .join('')}
    </ul>
  </li>
`;

const renderCurrentRefinements = (renderOptions, isFirstRender) => {
  const { items, createURL } = renderOptions;

  document.querySelector('#current-refinements').innerHTML = `
    <ul>
      ${items.map(item => renderListItem({ item, createURL })).join('')}
    </ul>
  `;
};
widgetParams
type: object

All original widget options forwarded to the render function.
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const renderCurrentRefinements = (renderOptions, isFirstRender) => {
  const { widgetParams } = renderOptions;

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

// ...

search.addWidget(
  customCurrentRefinements({
    container: document.querySelector('#current-refinements'),
  })
);

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 customCurrentRefinements = instantsearch.connectors.connectCurrentRefinements(
  renderCurrentRefinements
);

search.addWidget(
  customCurrentRefinements({
    // Optional parameters
    includedAttributes: string[],
    excludedAttributes: string[],
    transformItems: function,
  })
);

Instance options

includedAttributes
type: string[]
default: []
Optional

The attributes to include in the widget (all by default). Cannot be used with excludedAttributes. In the example below, only the categories attribute is included in the widget.
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customCurrentRefinements({
  includedAttributes: ['categories'],
});
excludedAttributes
type: string[]
default: ["query"]
Optional

The attributes to exclude from the widget. Cannot be used with includedAttributes. In the example below, the brand attribute is excluded from the widget.
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customCurrentRefinements({
  excludedAttributes: ['brand'],
});
transformItems
type: function
default: x => x
Optional

Receives the items, and is called before displaying them. Should return a new array with the same shape as the original array. Useful for mapping over the items to transform, and remove or reorder them.
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customCurrentRefinements({
  transformItems(items) {
    return items.filter(item => item.attribute !== 'brand');
  },
});

Full example

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// Create the render function
const createDataAttribtues = refinement =>
  Object.keys(refinement)
    .map(key => `data-${key}="${refinement[key]}"`)
    .join(' ');

const renderListItem = item => `
  <li>
    ${item.label}
    <ul>
      ${item.refinements
        .map(
          refinement =>
            `<li>
              ${refinement.label} (${refinement.count})
              <button ${createDataAttribtues(refinement)}>X</button>
            </li>`
        )
        .join('')}
    </ul>
  </li>
`;

const renderCurrentRefinements = (renderOptions, isFirstRender) => {
  const { items, refine, widgetParams } = renderOptions;

  widgetParams.container.innerHTML = `
    <ul>
      ${items.map(renderListItem).join('')}
    </ul>
  `;

  [...widgetParams.container.querySelectorAll('button')].forEach(element => {
    element.addEventListener('click', event => {
      const item = Object.keys(event.currentTarget.dataset).reduce(
        (acc, key) => ({
          ...acc,
          [key]: event.currentTarget.dataset[key],
        }),
        {}
      );

      refine(item);
    });
  });
};

// Create the custom widget
const customCurrentRefinements = instantsearch.connectors.connectCurrentRefinements(
  renderCurrentRefinements
);

// Instantiate the custom widget
search.addWidget(
  customCurrentRefinements({
    container: document.querySelector('#current-refinements'),
  })
);

HTML output

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<div class="ais-CurrentRefinements">
  <ul class="ais-CurrentRefinements-list">
    <li class="ais-CurrentRefinements-itemt">
      <span class="ais-CurrentRefinements-label">
        Category:
      </span>
      <span class="ais-CurrentRefinements-category">
        <span class="ais-CurrentRefinements-categoryLabel">
          Movies & TV Shows
        </span>
        <button class="ais-CurrentRefinements-delete">✕</button>
      </span>
      <span class="ais-CurrentRefinements-category">
        <span class="ais-CurrentRefinements-categoryLabel">
          Others
        </span>
        <button class="ais-CurrentRefinements-delete">✕</button>
      </span>
    </li>
    <li class="ais-CurrentRefinements-item">
      <span class="ais-CurrentRefinements-label">
        Brand:
      </span>
      <span class="ais-CurrentRefinements-category">
        <span class="ais-CurrentRefinements-categoryLabel">
          Algolia
        </span>
        <button class="ais-CurrentRefinements-delete">✕</button>
      </span>
    </li>
  </ul>
</div>

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