My website has the following code structure:
<link rel="amphtml" href="http://example.com/?amp"></head>
I want to extract the html link only on pages where the "amphtml" rel value is present. I attempted this code, but it causes issues on URLs where that tag is not found.
var ampLink_txt = document.querySelector("link[rel=amphtml]").getAttribute("href");
Since I can't modify the HTML document by adding any IDs or classes, could someone guide me in the right direction?
.querySelector has the possibility of returning null if it doesn't find anything. To avoid errors, always check if the result is null before proceeding:
const targetElement = document.querySelector(".target-class")
if (targetElement) {
const targetText = targetElement.textContent
// Additional operations here...
}
For more information, visit https://developer.mozilla.org/en-US/docs/Web/API/Document/querySelector
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