49 lines
1.8 KiB
JavaScript
49 lines
1.8 KiB
JavaScript
/*
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* Copyright 2024 Google LLC.
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/**
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* A URL matches about:blank if its scheme is "about", its path contains a single string
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* "blank", its username and password are the empty string, and its host is null.
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* https://html.spec.whatwg.org/multipage/urls-and-fetching.html#matches-about:blank
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* @param {string} url
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* @return {boolean}
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*/
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export function urlMatchesAboutBlank(url) {
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// An empty string is a special case, and considered to be about:blank.
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// https://html.spec.whatwg.org/multipage/nav-history-apis.html#window-open-steps
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if (url === '') {
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return true;
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}
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try {
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const parsedUrl = new URL(url);
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const schema = parsedUrl.protocol.replace(/:$/, '');
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return (schema.toLowerCase() === 'about' &&
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parsedUrl.pathname.toLowerCase() === 'blank' &&
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parsedUrl.username === '' &&
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parsedUrl.password === '' &&
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parsedUrl.host === '');
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}
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catch (err) {
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// Wrong URL considered do not match about:blank.
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if (err instanceof TypeError) {
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return false;
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}
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// Re-throw other unexpected errors.
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throw err;
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}
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}
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//# sourceMappingURL=UrlHelpers.js.map
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