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UI libraries / Angular InstantSearch / Widgets

ais-rating-menu

Angular InstantSearch isn’t compatible with Angular’s Ivy view engine. We’re investigating how best to support this. For more information and to vote for Algolia’s support of Angular 16 and beyond, see the GitHub issue Algolia Support for Angular InstantSearch

Signature 
<ais-rating-menu
  attribute="string"

  // Optional parameters
  [max]="number"
  andUpLabel="string"
></ais-rating-menu>
Import
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import { NgAisRatingMenuModule } from 'angular-instantsearch';

@NgModule({
  imports: [
    NgAisRatingMenuModule,
  ],
})
export class AppModule {}

1. Follow additional steps in Optimize build size to ensure your code is correctly bundled.
2. This imports all the widgets, even the ones you don’t use. Read the Getting started guide for more information.

See code examples

About this widget

The ais-rating-menu lets the user refine search results by clicking on stars.

The stars are based on the selected attribute.

Requirements

  • The attributes passed to the attributes prop must be declared as Attributes for faceting on the Algolia dashboard) or configured as attributesForFaceting with the Algolia API.

The attribute values must be integers, not strings nor floats. If your dataset includes float values, the widget returns only exact numerical matches. For example, if a user selects “4 [stars] & Up”, we only return records with values such as 4 or 5, not records with values like 4.5 or 4.7. If your attribute is a float, we recommend indexing a new attribute with the rounded integer value to use in this widget.

Examples

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<ais-rating-menu attribute="rating"></ais-rating-menu>

Props

Parameter Description
attribute
type: string
Required

The name of the attribute in the record.
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<ais-rating-menu attribute="rating"></ais-rating-menu>
max
type: number
default: 5
Optional

The maximum value for the rating.
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<ais-rating-menu
  // ...
  [max]="3"
></ais-rating-menu>
andUpLabel
type: string
default: & Up
Optional

Label for the “& Up” message.
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<ais-rating-menu
  // ...
  andUpLabel="& More"
></ais-rating-menu>

HTML output

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<div class="ais-RatingMenu">
  <svg xmlns="http://www.w3.org/2000/svg" style="display:none;">
    <symbol id="ais-RatingMenu-starSymbol" viewBox="0 0 24 24">
      <path d="M12 .288l2.833 8.718h9.167l-7.417 5.389 2.833 8.718-7.416-5.388-7.417 5.388 2.833-8.718-7.416-5.389h9.167z"/>
    </symbol>
    <symbol id="ais-RatingMenu-starEmptySymbol" viewBox="0 0 24 24">
      <path d="M12 6.76l1.379 4.246h4.465l-3.612 2.625 1.379 4.246-3.611-2.625-3.612 2.625 1.379-4.246-3.612-2.625h4.465l1.38-4.246zm0-6.472l-2.833 8.718h-9.167l7.416 5.389-2.833 8.718 7.417-5.388 7.416 5.388-2.833-8.718 7.417-5.389h-9.167l-2.833-8.718z"/>
    </symbol>
  </svg>
  <ul class="ais-RatingMenu-list">
    <li class="ais-RatingMenu-item ais-RatingMenu-item--disabled">
      <div class="ais-RatingMenu-link" aria-label="5 & up" disabled>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <span class="ais-RatingMenu-label" aria-hidden="true">& Up</span>
        <span class="ais-RatingMenu-count">2,300</span>
      </div>
    </li>
    <li class="ais-RatingMenu-item ais-RatingMenu-item--selected">
      <a class="ais-RatingMenu-link" aria-label="4 & up" href="#">
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--empty" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starEmptySymbol"></use></svg>
        <span class="ais-RatingMenu-label" aria-hidden="true">& Up</span>
        <span class="ais-RatingMenu-count">2,300</span>
      </a>
    </li>
    <li class="ais-RatingMenu-item">
      <a class="ais-RatingMenu-link" aria-label="3 & up" href="#">
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--full" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starSymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--empty" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starEmptySymbol"></use></svg>
        <svg class="ais-RatingMenu-starIcon ais-RatingMenu-starIcon--empty" aria-hidden="true" width="24" height="24"><use xlink:href="#ais-RatingMenu-starEmptySymbol"></use></svg>
        <span class="ais-RatingMenu-label" aria-hidden="true">& Up</span>
        <span class="ais-RatingMenu-count">1,750</span>
      </a>
    </li>
  </ul>
</div>

Customize the UI with connectRatingMenu

If you want to create your own UI of the ais-rating-menu widget, you can combine the connectRatingMenu connector with the TypedBaseWidget class.

See code examples

1. Extend the TypedBaseWidget class

First of all, you will need to write some boilerplate code to initialize correctly the TypedBaseWidget class. This happens in the constructor() of your class extending the TypedBaseWidget class.

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import { Component, Inject, forwardRef, Optional } from '@angular/core';
import { TypedBaseWidget, NgAisInstantSearch, NgAisIndex } from 'angular-instantsearch';

@Component({
  selector: 'app-rating-menu',
  template: '<p>It works!</p>'
})
export class RatingMenu extends TypedBaseWidget {
  constructor(
    @Inject(forwardRef(() => NgAisIndex))
    @Optional()
    public parentIndex: NgAisIndex,
    @Inject(forwardRef(() => NgAisInstantSearch))
    public instantSearchInstance: NgAisInstantSearch
  ) {
    super('RatingMenu');
  }
}

There are a couple of things happening in this boilerplate:

  • create a RatingMenu class extending TypedBaseWidget
  • reference the <ais-instantsearch> parent component instance on the RatingMenu widget class
  • set app-rating-menu as a selector, so we can use our component as <app-rating-menu></app-rating-menu>

2. Connect your custom widget

The TypedBaseWidget class has a method called createWidget() which takes two arguments: the connector to use and an object of options (instance options) for this connector. We call this method at ngOnInit. This component now implements OnInit.

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import { Component, Inject, forwardRef, Optional } from '@angular/core';
import { TypedBaseWidget, NgAisInstantSearch, NgAisIndex } from 'angular-instantsearch';

import connectRatingMenu, {
  RatingMenuWidgetDescription,
  RatingMenuConnectorParams
} from 'instantsearch.js/es/connectors/rating-menu/connectRatingMenu';

@Component({
  selector: 'app-rating-menu',
  template: '<p>It works!</p>'
})
export class RatingMenu extends TypedBaseWidget<RatingMenuWidgetDescription, RatingMenuConnectorParams> {
  public state: RatingMenuWidgetDescription['renderState']; // Rendering options
  constructor(
    @Inject(forwardRef(() => NgAisIndex))
    @Optional()
    public parentIndex: NgAisIndex,
    @Inject(forwardRef(() => NgAisInstantSearch))
    public instantSearchInstance: NgAisInstantSearch
  ) {
    super('RatingMenu');
  }
  ngOnInit() {
    this.createWidget(connectRatingMenu, {
      // instance options
      attribute: 'rating',
    });
    super.ngOnInit();
  }
}

3. Render from the state

Your component instance has access to a this.state property which holds the rendering options of the widget.

public state: RatingMenuWidgetDescription['renderState'];
// {
//   items: object[];
//   canRefine: boolean;
//   refine: Function;
//   createURL: Function;
// }
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<ul>
  <li *ngFor="let item of state.items">
    <a href="#" (click)="state.refine(item.value)">
      <span *ngFor="let star of item.stars">
        <span *ngIf="star">★</span>
        <span *ngIf="!star">☆</span>
      </span>
    </a>
  </li>
</ul>

Rendering options

Parameter Description
items
type: object[]

This list of stars to display, with:

  • count: number: the number of results that match this refinement
  • isRefined: boolean: whether the refinement is selected
  • name: string: the name corresponding to the number of stars
  • value: string: the number of stars with a string form
  • stars: boolean[]: the list of stars to generate with:
    • true: a filled star
    • false: an empty star
canRefine
type: boolean

Whether the search can be refined.
refine
type: function

Selects a rating to filter the results. Takes the value of an item as parameter.
createURL
type: function

Generates a URL for the next state. Takes the value of an item as parameter.

Instance options

Parameter Description
attribute
type: string
Required

The name of the attribute in the record.
max
type: number
default: 5
Optional

The maximum value for the rating.

Full example

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import { Component, Inject, forwardRef, Optional } from '@angular/core';
import { TypedBaseWidget, NgAisInstantSearch, NgAisIndex } from 'angular-instantsearch';

import connectRatingMenu, {
  RatingMenuWidgetDescription,
  RatingMenuConnectorParams
} from 'instantsearch.js/es/connectors/rating-menu/connectRatingMenu';

@Component({
  selector: 'app-rating-menu',
  template: `
<ul>
  <li *ngFor="let item of state.items">
    <a href="#" (click)="state.refine(item.value)">
      <span *ngFor="let star of item.stars">
        <span *ngIf="star">★</span>
        <span *ngIf="!star">☆</span>
      </span>
    </a>
  </li>
</ul>
`
})
export class RatingMenu extends TypedBaseWidget<RatingMenuWidgetDescription, RatingMenuConnectorParams> {
  public state: RatingMenuWidgetDescription['renderState']; // Rendering options
  constructor(
    @Inject(forwardRef(() => NgAisIndex))
    @Optional()
    public parentIndex: NgAisIndex,
    @Inject(forwardRef(() => NgAisInstantSearch))
    public instantSearchInstance: NgAisInstantSearch
  ) {
    super('RatingMenu');
  }
  ngOnInit() {
    this.createWidget(connectRatingMenu, {
      // instance options
      attribute: 'rating',
    });
    super.ngOnInit();
  }
}
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