angular-cn/packages/core/schematics/utils/parse_html.ts

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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {parseTemplate} from '@angular/compiler';
import {Node} from '@angular/compiler/src/render3/r3_ast';
/**
* Parses the given HTML content using the Angular compiler. In case the parsing
* fails, null is being returned.
*/
export function parseHtmlGracefully(htmlContent: string, filePath: string): Node[]|null {
try {
return parseTemplate(htmlContent, filePath).nodes;
} catch {
// Do nothing if the template couldn't be parsed. We don't want to throw any
// exception if a template is syntactically not valid. e.g. template could be
// using preprocessor syntax.
return null;
}
}