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var headers = {}; for (var header of document.querySelectorAll("head meta, head link, head script")) { var name = header.tagName.toLowerCase(); if (name === "meta") { var key = header.getAttribute("name") || header.getAttribute("property"); } else if (name === "link" || name === "script") { var key = header.getAttribute("rel"); } var value = null; if (header.hasAttribute("content")) { value = header.getAttribute("content"); } else if (header.hasAttribute("href")) { value = header.getAttribute("href"); } else if (header.hasAttribute("src")) { value = header.getAttribute("src"); } if (key && value) { headers[key] = value; } } console.log(headers);
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