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feat(core): add support for ShadowDOM v1 (#24718)

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add a new ViewEncapsulation.ShadowDom option that uses the v1 Shadow DOM API to provide style encapsulation.

PR Close #24718
This commit is contained in:
Rob Wormald
2018-06-28 12:42:04 -07:00
committed by Miško Hevery
parent 1ae3f87383
commit 3553977bd7
8 changed files with 198 additions and 8 deletions
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7
packages/platform-browser/src/dom/dom_renderer.ts
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@ -83,6 +83,7 @@ export class DomRendererFactory2 implements RendererFactory2 {
return renderer;
}
case ViewEncapsulation.Native:
case ViewEncapsulation.ShadowDom:
return new ShadowDomRenderer(this.eventManager, this.sharedStylesHost, element, type);
default: {
if (!this.rendererByCompId.has(type.id)) {
@ -256,7 +257,11 @@ class ShadowDomRenderer extends DefaultDomRenderer2 {
eventManager: EventManager, private sharedStylesHost: DomSharedStylesHost,
private hostEl: any, private component: RendererType2) {
super(eventManager);
this.shadowRoot = (hostEl as any).createShadowRoot();
if (component.encapsulation === ViewEncapsulation.ShadowDom) {
this.shadowRoot = (hostEl as any).attachShadow({mode: 'open'});
} else {
this.shadowRoot = (hostEl as any).createShadowRoot();
}
this.sharedStylesHost.addHost(this.shadowRoot);
const styles = flattenStyles(component.id, component.styles, []);
for (let i = 0; i < styles.length; i++) {