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@anypoint-web-components/anypoint-autocomplete

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@anypoint-web-components/anypoint-autocomplete

Anypoint styled autocomplete for inputs.

0.2.13
latest
Source
npm
Version published
Weekly downloads
407
-28.85%
Maintainers
4
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Created
Source

Deprecated

This component has been moved to anypoint-web-components/awc.

This component is based on Material Design lists.

Anypoint web components are set of components that allows to build Anypoint enabled UI in open source projects.

The element renders accessible list of suggestions for an input field.

Build Status

tests

Usage

Installation

npm install --save @anypoint-web-components/anypoint-autocomplete

In a HTML document

<html>
  <head>
    <script type="module">
      import '@anypoint-web-components/anypoint-autocomplete/anypoint-autocomplete.js';
      import '@anypoint-web-components/anypoint-input/anypoint-input.js';
    </script>
  </head>
  <body>
    <div class="parent">
      <anypoint-input id="targetInput"></anypoint-input>
      <anypoint-autocomplete target="targetInput"></anypoint-autocomplete>
    </div>

    <script>
    {
      document.querySelector('anypoint-autocomplete').source = [
        'a',
        'b',
        'c',
        'd'
      ];
    }
    </script>
  </body>
</html>

Asynchronous suggestions

When the input value changes the autocomplete dispatches query event. Your application should handle this event, generate suggestions for the user, and set the source property.

To indicate to the user that the suggestions are async you may set loader property. It renders a progress bar until source property change.

<div class="parent">
  <anypoint-input id="targetInput"></anypoint-input>
  <anypoint-autocomplete target="targetInput"></anypoint-autocomplete>
</div>
<script>
{
  document.querySelector('anypoint-autocomplete').onquery = (e) => {
    const { value } = e.detail;
    const suggestions = await getAsyncSuggestions(value);
    e.target.source = suggestions;
  };
}
</script>

In a LitElement

import { LitElement, html } from 'lit-element';
import '@anypoint-web-components/anypoint-autocomplete/anypoint-autocomplete.js';
import '@anypoint-web-components/anypoint-input/anypoint-input.js';

class SimpleElement extends ControlStateMixin(ButtonStateMixin(LitElement)) {
  render() {
    return html`
    <div class="parent">
      <anypoint-input id="targetInput"></anypoint-input>
      <anypoint-autocomplete
        target="targetInput"
        loader
        .source="${this.suggestions}"
        @query="${this._handleQuery}"></anypoint-autocomplete>
    </div>
    `;
  }

  async _handleQuery(e) {
    const { value } = e.detail;
    this.suggestions = await getAsyncSuggestions(value);
  }
}
window.customElements.define('simple-element', SimpleElement);

Suggestions model

{
  "value": "Required, string. The value to insert into the input field",
  "label": "Optional, string. When set this will be used as the drop down list label",
  "description": "Optional, string. When set it renders a second line for the suggestion with help message. Keep it short!"
}

Accessibility

The autocomplete element follows W3C guidelines for ARIA 1.1 Combobox with Listbox Popup. The element is enabled to support screen readers.

Because of how screen readers parses page content and associate roles, the element places suggestions as child elements of the autosuggestion element. This means that you may accidentally style list items from your master CSS file.

Because autocomplete element and text input requires a parent element with specific role, put both elements inside single parent. The element takes care of setting roles and aria attributes on all elements.

Your code

<div class="parent">
  <anypoint-input id="targetInput"></anypoint-input>
  <anypoint-autocomplete target="targetInput"></anypoint-autocomplete>
</div>

After initialization

<div
  class="parent"
  role="combobox"
  aria-label="Text input with list suggestions"
  aria-expanded="true"
  aria-owns="paperAutocompleteInput7302"
  aria-haspopup="listbox">
  <anypoint-input
    id="targetInput"
    aria-autocomplete="list"
    autocomplete="off"
    aria-haspopup="true"
    aria-controls="paperAutocompleteInput63418"></anypoint-input>
  <anypoint-autocomplete
    target="targetInput"
    id="paperAutocompleteInput7302"
    aria-controls="paperAutocompleteInput63418"
    >
    <anypoint-dropdown>
      <anypoint-listbox
        aria-label="Use arrows and enter to select list item. Escape to close the list."
        role="listbox"
        aria-activedescendant=""
        id="paperAutocompleteInput63418"></anypoint-listbox>
    </anypoint-dropdown>
  </anypoint-autocomplete>
</div>

You can set aria-label on the parent to override default message. However other attributes are always changed to comply with accessibility requirements.

Development

git clone https://github.com/anypoint-web-components/anypoint-autocomplete
cd anypoint-autocomplete
npm install

Running the demo locally

npm start

Running the tests

npm test

Keywords

web-components
anypoint
button

FAQs

Package last updated on 15 Oct 2021

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