mirror of
https://github.com/angular/angular
synced 2026-05-24 09:28:37 +00:00
30 lines
1,017 B
TypeScript
30 lines
1,017 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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const UNUSABLE_INTERPOLATION_REGEXPS = [
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/^\s*$/, // empty
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/[<>]/, // html tag
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/^[{}]$/, // i18n expansion
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/&(#|[a-z])/i, // character reference,
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/^\/\//, // comment
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];
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export function assertInterpolationSymbols(identifier: string, value: any): void {
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if (value != null && !(Array.isArray(value) && value.length == 2)) {
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throw new Error(`Expected '${identifier}' to be an array, [start, end].`);
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} else if (value != null) {
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const start = value[0] as string;
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const end = value[1] as string;
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// Check for unusable interpolation symbols
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UNUSABLE_INTERPOLATION_REGEXPS.forEach(regexp => {
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if (regexp.test(start) || regexp.test(end)) {
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throw new Error(`['${start}', '${end}'] contains unusable interpolation symbol.`);
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}
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});
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}
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}
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