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