canonical in javascript

To add a canonical link to an HTML document using JavaScript, you can use the DOM (Document Object Model) to create a <link> element and add it to the <head> section of your page. The canonical link should point to the preferred URL for the content on the page.

Here's an example of how to add a canonical link using JavaScript:


index.tsx
var canonicalLink = document.createElement('link');
canonicalLink.setAttribute('rel', 'canonical');
canonicalLink.setAttribute('href', 'https://www.example.com/my-page');

var head = document.getElementsByTagName('head')[0];
head.appendChild(canonicalLink);
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In this example, we create a new <link> element, set its rel attribute to 'canonical', and set its href attribute to the preferred URL for the content. We then find the <head> element of the page using document.getElementsByTagName('head')[0], and append the new <link> element to it using head.appendChild(canonicalLink).

By adding a canonical link to your page, you can help search engines understand the preferred URL for your content and avoid potential duplicate content issues.

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