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42 lines
1.1 KiB
JavaScript
42 lines
1.1 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* Collects Twitter card (https://developer.twitter.com/en/docs/twitter-for-websites/)
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* related data from a page.
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*/
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export const TwitterPageData = {
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/**
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* Collects the twitter data from the page.
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*
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* @param {Document} document
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* The document to collect from
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*
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* @returns {PageData}
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*/
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collect(document) {
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let pageData = {};
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let twitterTags = document.querySelectorAll("meta[name^='twitter:'");
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for (let tag of twitterTags) {
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// Strip "twitter:" from the property name.
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let propertyName = tag.getAttribute("name").substring(8);
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switch (propertyName) {
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case "site":
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pageData.siteName = tag.getAttribute("content");
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break;
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case "description":
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pageData.description = tag.getAttribute("content");
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break;
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case "image":
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pageData.image = tag.getAttribute("content");
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break;
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}
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}
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return pageData;
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},
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};
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