mirror of
https://github.com/angular/angular
synced 2026-05-24 09:28:37 +00:00
41 lines
1,019 B
TypeScript
41 lines
1,019 B
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {LTreeStrategy} from './ltree';
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import {RTreeStrategy} from './render-tree';
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export {
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getDirectiveHostElement,
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getLViewFromDirectiveOrElementInstance,
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METADATA_PROPERTY_NAME,
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} from './ltree';
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// The order of the strategies matters. Lower indices have higher priority.
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const strategies = [new RTreeStrategy(), new LTreeStrategy()];
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let strategy: null | RTreeStrategy | LTreeStrategy = null;
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const selectStrategy = (element: Element) => {
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for (const s of strategies) {
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if (s.supports(element)) {
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return s;
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}
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}
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return null;
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};
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export const buildDirectiveTree = (element: Element) => {
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if (!strategy) {
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strategy = selectStrategy(element);
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}
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if (!strategy) {
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console.error('Unable to parse the component tree');
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return [];
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}
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return strategy.build(element);
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};
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