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feat(elements): enable Shadow DOM v1 and slots (#24861)

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When using ViewEncapsulation.ShadowDom, Angular will not remove the child nodes of the DOM node a root Component is bootstrapped into. This enables developers building Angular Elements to use the `<slot>` element to do native content projection.

PR Close #24861
This commit is contained in:
Rob Wormald
2018-07-15 18:53:18 -07:00
committed by Misko Hevery
parent 4815b92495
commit c9844a2f01
10 changed files with 32 additions and 58 deletions
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4
packages/core/src/render/api.ts
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@ -266,6 +266,10 @@ export abstract class Renderer2 {
* Implement this callback to prepare an element to be bootstrapped
* as a root element, and return the element instance.
* @param selectorOrNode The DOM element.
* @param preserveContent Whether the contents of the root element
* should be preserved, or cleared upon bootstrap (default behavior).
* Use with `ViewEncapsulation.ShadowDom` to allow simple native
* content projection via `<slot>` elements.
* @returns The root element.
*/
abstract selectRootElement(selectorOrNode: string|any, preserveContent?: boolean): any;