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webcomponent
Advanced tools
Lightweight utilities for constructing Web Components
Install via npm
, for packaging with a bundler such as Webpack
or Browserify
:
npm install --save webcomponent
If your target environment does not have native support for Web Components, you should include a separate polyfill such as webcomponents.js.
Register web components by extending the WebComponent
class instead of HTMLElement
:
import WebComponent from 'webcomponent';
class MyWidget extends WebComponent {
connectedCallback() {
// ...
}
get myprop() {
// ...
}
// etc
}
customElements.define('my-widget', MyWidget);
WebComponent
is a thin wrapper around HTMLElement
which
getJSONAttribute(attrName [, errorHandler])
Parse an attribute which has been serialized as JSON, e.g.,
<my-widget data-magic-numbers="[1,2,3]">
this.getJSONAttribute('data-magic-numbers') // [1, 2, 3]
If no errorHandler
is passed, JSON-parsing errors will result in null
being returned.
getNumberAttribute(attrName)
Parse a numeric attribute, e.g.,
<my-widget-list num-widgets="15">
this.getNumberAttribute('num-widgets') // 15
Non-numeric values will return null
.
isAttributeEnabled(attrName)
Check whether a boolean-like attribute is 'enabled', taking into account usages such as:
<my-widget awesome="true"> <!-- enabled -->
<my-widget awesome> <!-- enabled -->
<my-widget awesome="awesome"> <!-- enabled -->
<my-widget awesome="false"> <!-- disabled -->
<my-widget> <!-- disabled -->
Install dependencies: npm install
Run local demo:
cd demo
npm install
npm start
Browser tests run with Selenium through web-component-tester.
npm test
npm run build-test && npm run test-browser-sauce
Set credentials with environment variables SAUCE_USERNAME
and SAUCE_ACCESS_KEY
. The default browser/OS matrix is defined in wct.conf.json
.
MIT
FAQs
lightweight helpers for constructing web components
We found that webcomponent demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 7 open source maintainers collaborating on the project.
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