Noscript in head contains invalid HTML elements issue means tha the URL contains a<noscript> tag in the <head> which includes invalid HTML elements.
Why It’s Important
The <noscript> tag defines an alternate content for users that have disabled scripts in their browser or have a browser that doesn’t support script.
Whilst it can be used in both the <head> and the <body>, when used inside the <head>, it must contain only <link>,<style>, and <meta> elements.
How to Check the Issue?
This Issue will trigger for any internal URL that contains <noscript> in the <head>, with an invalid element (i.e. anything other than <link>,<style>, and <meta> elements).
To find it, check the source code. Access the page with your Chrome browser, right-click it, and pick “View page source” (this method differs in other browsers). This simple online tool https://codebeautify.org/source-code-viewer will also help you access the source code.
Here’s an example of invalid <noscript> in the <head>:
<noscript><h1>Why is it here?</h1></noscript>
Find out not only the information about Noscript in head containing invalid HTML elements, but also the presence of technical errors on it!
Conduct a full audit to find out and fix all the site level and page level issues on your website.
How to Fix the Issue?
You will first need to establish what the <noscript> is and what it is doing. It may be possible to simply move the <noscript> out of the <head>, and into the <body>, where such elements are valid. All invalid elements should be removed from the <noscript>, if it is to remain in the <head>.
Unfortunately, they include an image element within the noscript, which breaks the <head> as described above, and this case is not immune simply because Facebook said you should do it.
There are two potential solutions for this specific Facebook problem:
– Just put the <noscript> bit in the body. If you trust random users on Stack Overflow, it will work just fine.