API Reference / React InstantSearch Widgets / SortBy
Aug. 23, 2019
Widget signature
<SortBy
  items={object[]}
  defaultRefinement={string}
  // Optional parameters
  transformItems={function}
/>

About this widget

The SortBy widget displays a list of indices, allowing a user to change the way hits are sorting (with replica indices). Another common use case for this widget is to let the user switch between different indices.

For this widget to work, you must define all indices that you pass down as options as replicas of the main index.

Examples

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import { SortBy } from 'react-instantsearch-dom';

<SortBy
  defaultRefinement="instant_search"
  items={[
    { value: 'instant_search', label: 'Featured' },
    { value: 'instant_search_price_asc', label: 'Price asc.' },
    { value: 'instant_search_price_desc', label: 'Price desc.' },
  ]}
/>

Props

items
type: object[]
Required

The list of indices to search in.

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<SortBy
  // ...
  items={[
    { value: 'instant_search', label: 'Featured' },
    { value: 'instant_search_price_asc', label: 'Price asc.' },
    { value: 'instant_search_price_desc', label: 'Price desc.' },
  ]}
/>
defaultRefinement
type: string
Required

The index selected by default.

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<SortBy
  // ...
  defaultRefinement="instant_search"
/>
transformItems
type: function
default: items => items
Optional

Modifies the items being displayed, for example, to filter or sort them. Takes items as argument and expects them back in return.

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<SortBy
  // ...
  transformItems={items =>
    items.map(item => ({
      ...item,
      label: item.label.toUpperCase(),
    }))
  }
/>

HTML output

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<div class="ais-SortBy">
  <select class="ais-SortBy-select">
    <option class="ais-SortBy-option" value="instant_search">Featured</option>
    <option class="ais-SortBy-option" value="instant_search_price_asc">Price asc.</option>
    <option class="ais-SortBy-option" value="instant_search_price_desc">Price desc.</option>
  </select>
</div>

Customize the UI - connectSortBy

If you want to create your own UI of the SortBy widget or use another UI library, you can use connectors.

Connectors are higher-order components. They encapsulate the logic for a specific kind of widget and they provide a way to interact with the InstantSearch context.

They have an outer component API that we call exposed props, and they provide some other props to the wrapped components which are called the provided props.

It’s a 3-step process:

// 1. Create a React component
const SortBy = () => {
  // return the DOM output
};

// 2. Connect the component using the connector
const CustomSortBy = connectSortBy(SortBy);

// 3. Use your connected widget
<CustomSortBy />

Create a React component

const SortBy = ({
  object[] items,
  string currentRefinement,
  function refine,
  function createURL,
}) => {
  // return the DOM output
};

Provided Props

items
type: object[]

The list of items the widget can display, with each item:

  • label: string: the label for the option.
  • value: string: the value for the option.
  • isRefined: boolean: whether or not the refinement is selected.
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const SortBy = ({ items }) => (
  <ul>
    {items.map(item => (
      <li key={item.value} style={{ fontWeight: item.isRefined ? 'bold' : '' }}>
        {item.label}
      </li>
    ))}
  </ul>
);
currentRefinement
type: string

The currently applied refinement.

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const SortBy = ({ items, currentRefinement, refine }) => (
  <div>
    <p>
      The search display the index <code>{currentRefinement}</code>.
    </p>
    <ul>
      {items.map(item => (
        <li key={item.value}>
          <a
            href="#"
            style={{ fontWeight: item.isRefined ? 'bold' : '' }}
            onClick={event => {
              event.preventDefault();
              refine(item.value);
            }}
          >
            {item.label}
          </a>
        </li>
      ))}
    </ul>
  </div>
);
refine
type: function

Switches indices and triggers a new search.

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const SortBy = ({ items, refine }) => (
  <ul>
    {items.map(item => (
      <li key={item.value}>
        <a
          href="#"
          style={{ fontWeight: item.isRefined ? 'bold' : '' }}
          onClick={event => {
            event.preventDefault();
            refine(item.value);
          }}
        >
          {item.label}
        </a>
      </li>
    ))}
  </ul>
);
createURL
type: function

Generates a URL for the corresponding search state.

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const SortBy = ({ items, createURL }) => (
  <ul>
    {items.map(item => (
      <li key={item.value}>
        <a
          href={createURL(item.value)}
          style={{ fontWeight: item.isRefined ? 'bold' : '' }}
        >
          {item.label}
        </a>
      </li>
    ))}
  </ul>
);

Create and instantiate your connected widget

const CustomSortBy = connectSortBy(SortBy);

<CustomSortBy
  items={object[]}
  defaultRefinement={string}
  // Optional parameters
  transformItems={function}
/>

Exposed Props

items
type: object[]
Required

The list of indices to search in.

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<CustomSortBy
  // ...
  items={[
    { value: 'instant_search', label: 'Featured' },
    { value: 'instant_search_price_asc', label: 'Price asc.' },
    { value: 'instant_search_price_desc', label: 'Price desc.' },
  ]}
/>
defaultRefinement
type: string
Required

The index selected by default.

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<CustomSortBy
  // ...
  defaultRefinement="instant_search"
/>
transformItems
type: function
default: items => items
Optional

Modifies the items being displayed, for example, to filter or sort them. Takes items as argument and expects them back in return.

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<CustomSortBy
  // ...
  transformItems={items =>
    items.map(item => ({
      ...item,
      label: item.label.toUpperCase(),
    }))
  }
/>

Full example

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import { connectSortBy } from 'react-instantsearch-dom';

const SortBy = ({ items, refine, createURL }) => (
  <ul>
    {items.map(item => (
      <li key={item.value}>
        <a
          href={createURL(item.value)}
          style={{ fontWeight: item.isRefined ? 'bold' : '' }}
          onClick={event => {
            event.preventDefault();
            refine(item.value);
          }}
        >
          {item.label}
        </a>
      </li>
    ))}
  </ul>
);

const CustomSortBy = connectSortBy(SortBy);

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