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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
The npm package webcomponent receives a total of 321 weekly downloads. As such, webcomponent popularity was classified as not popular.
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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Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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