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Safe Practice to add Links to cross-origin destination

in UI/UX on December 1, 2020

When you link to a page on another site using the target="_blank" attribute, you can expose your site to performance and security issues.

For example:

1. The other page may run on the same process as your page.

If the other page is running a lot of JavaScript, your page’s performance may suffer.

2. The other page can access your window object with the window.opener property.

This may allow the other page to redirect your page to a malicious URL.

Solution

Adding rel="noopener" or rel="noreferrer" to your target="_blank" links avoids these issues.

How to improve your site’s performance and prevent security vulnerabilities 

Add rel="noopener" or rel="noreferrer" to each external link.

When you use target=”_blank”, always add rel=”noopener” or rel=”noreferrer”.

After doing that your link will look similar to this:


<a href="https://example.com" target="_blank" rel="noreferrer">
  Example
</a>

OR if you’ve used rel="noopener" then your link will look similar to this:


<a href="https://example.com" target="_blank" rel="noopener">
  Example
</a>

💡rel=”noopener” prevents the new page from being able to access the window.opener property and ensures it runs in a separate process.

💡rel=”noreferrer” has the same effect but also prevents the Referer header from being sent to the new page. 

Credit: Web Dev

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