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@lit-labs/scoped-registry-mixin
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A mixin for using speculative "scoped CustomElementRegistry" with LitElement.
ScopedRegistryHost
mixin for LitElement
that integrates with the speculative Scoped CustomElementRegistry polyfill.
🚨 Warning: Scoped Custom Element Registries is a proposed browser API. It has not been finalized nor shipped in any browser. This mixin is provided to evaluate the proposal and facilitate feedback. Use this feature, and the polyfill in production code at your own risk.
The Scoped Custom Element Registries WICG proposal introduces new APIs for scoping custom element definitions to shadow roots, such that the mapping of tag names to custom element class doesn't rely on a single global registry.
When new elements are created within a shadow root with a scoped custom element registry, the browser will use the scoped registry rather than the global registry to look up custom element definitions. When using a scoped element registry, all used custom element elements must be defined within that scope.
ScopedRegistryHost
adds the following features to LitElement:
attachShadow()
to enable scopingA speculative Scoped CustomElementRegistry polyfill is being developed. Because the proposal is not implemented natively, ScopedRegistryHost
requires the polyfill.
The mixin adds a declarative static elementDefinitions
property for declaring the custom elements to be scoped locally to its Shadow DOM.
Basic usage is as follows:
import {LitElement, html} from 'lit';
import {ScopedRegistryHost} from '@lit-labs/scoped-registry-mixin';
import {SimpleGreeting} from './simple-greeting.js';
class ScopedComponent extends ScopedRegistryHost(LitElement) {
// Elements here will be registered against the tag names provided only
// in the shadow root for this element
static elementDefinitions = {
'simple-greeting': SimpleGreeting,
};
render() {
return html` <simple-greeting
id="greeting"
name="scoped world"
></simple-greeting>`;
}
}
Please see CONTRIBUTING.md.
FAQs
A mixin for using speculative "scoped CustomElementRegistry" with LitElement.
We found that @lit-labs/scoped-registry-mixin demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 11 open source maintainers collaborating on the project.
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