@brightspace-ui-labs/autocomplete

@brightspace-ui-labs/autocomplete

Note: this is a "labs" component. While functional, these tasks are prerequisites to promotion to BrightspaceUI "official" status:

• Design organization buy-in
• design.d2l entry
• Architectural sign-off
• Continuous integration
• Cross-browser testing
• Unit tests (if applicable)
• Accessibility tests
• Visual diff tests
• Localization with Serge (if applicable)
• Demo page
• README documentation

Polymer-based web component for integrating autocomplete with text inputs

Installation

npm install @brightspace-ui-labs/autocomplete

Components

Text Input

<d2l-labs-autocomplete-input-text id="my-autocomplete"></d2l-labs-autocomplete-input-text>

const autocomplete = document.getElementById('my-autocomplete')
autocomplete.data = [
	{ value: 'Option 1' },
	{ value: 'Option 2' }
]

/**
 * The filter function can be changed - it should accept two arguments (value, filter)
 * and return true if `value` should be in the filtered list.
 * E.g., Only return values that match the entered filter exactly
 */
autocomplete.filterFn = (value, filter) => value === filter;

Custom Input

<d2l-labs-autocomplete id="my-autocomplete">
	<input id="my-input" slot="input">
</d2l-labs-autocomplete>
<!-- Set data as above -->

Remote Source

Set remote-source on the autocomplete.

Add an event listener for the d2l-labs-autocomplete-filter-change event, and set the suggestions manually after fetching the filtered options.

E.g.,

<d2l-labs-autocomplete-input-text id="my-autocomplete" remote-source></d2l-labs-autocomplete-input-text>

autocomplete.addEventListener('d2l-labs-autocomplete-filter-change', event => {
	fetchResultsFromRemoteSource(event.detail.value)
		.then(results => autocomplete.setSuggestions(results))
})

Events

• d2l-labs-autocomplete-filter-change (remote source only)
  • Emitted whenever the filter changes, provided the filter is at least min-length characters long (default: 1). Also fires when the input is cleared.
• d2l-labs-autocomplete-suggestion-selected
  • Emitted when a suggestion from the dropdown is selected (keyboard or mouse).

Developing, Testing and Contributing

After cloning the repo, run npm install to install dependencies.

Linting

npm run lint

Testing

# lint & run headless unit tests
npm test

# unit tests only
npm run test:headless

# debug or run a subset of local unit tests
npm run test:headless:watch

Running the demos

To start a @web/dev-server that hosts the demo page and tests:

npm start

Versioning & Releasing

TL;DR: Commits prefixed with fix: and feat: will trigger patch and minor releases when merged to main. Read on for more details...

The semantic-release GitHub Action is called from the release.yml GitHub Action workflow to handle version changes and releasing.

Version Changes

All version changes should obey semantic versioning rules:

1. MAJOR version when you make incompatible API changes,
2. MINOR version when you add functionality in a backwards compatible manner, and
3. PATCH version when you make backwards compatible bug fixes.

The next version number will be determined from the commit messages since the previous release. Our semantic-release configuration uses the Angular convention when analyzing commits:

• Commits which are prefixed with fix: or perf: will trigger a patch release. Example: fix: validate input before using
• Commits which are prefixed with feat: will trigger a minor release. Example: feat: add toggle() method
• To trigger a MAJOR release, include BREAKING CHANGE: with a space or two newlines in the footer of the commit message
• Other suggested prefixes which will NOT trigger a release: build:, ci:, docs:, style:, refactor: and test:. Example: docs: adding README for new component

To revert a change, add the revert: prefix to the original commit message. This will cause the reverted change to be omitted from the release notes. Example: revert: fix: validate input before using.

Releases

When a release is triggered, it will:

• Update the version in package.json
• Tag the commit
• Create a GitHub release (including release notes)
• Deploy a new package to NPM

Releasing from Maintenance Branches

Occasionally you'll want to backport a feature or bug fix to an older release. semantic-release refers to these as maintenance branches.

Maintenance branch names should be of the form: +([0-9])?(.{+([0-9]),x}).x.

Regular expressions are complicated, but this essentially means branch names should look like:

• 1.15.x for patch releases on top of the 1.15 release (after version 1.16 exists)
• 2.x for feature releases on top of the 2 release (after version 3 exists)