JavaScript: Page Title Updated by JavaScript

Pages that have page titles that are modified by JavaScript.

This means the page title in the raw HTML is different to the page title in the rendered HTML.

How to Analyse in the SEO Spider

Enable JavaScript rendering mode via ‘Config > Spider > Rendering’ and select ‘JavaScript’ to crawl JavaScript websites.

View URLs with this issue in the ‘JavaScript’ tab and ‘Page Title Updated by JavaScript’ filter, and export all URLs using the ‘Export’ button.

The ‘HTML Title’ column shows the page title found in the original HTML before JavaScript.

The ‘Rendered HTML Title’ column shows the page title found in the rendered HTML after JavaScript has been processed.

Read our tutorial on ‘How To Crawl JavaScript Websites‘.

What Triggers This Issue

This issue is triggered when the page title present in the raw HTML of a webpage is modified by JavaScript, resulting in a different title in the rendered HTML.

For example:

https://www.screamingfrog.co.uk/technical-seo/

Has the page title:

<title>Technical SEO Agency - Screaming Frog</title>

In the raw HTML, but this is changed to:

<title>Technical SEO Consultants - Screaming Frog</title>

After JavaScript is executed.

How To Fix

While Google is able to render pages and see client-side only content, consider including important content server side in the raw HTML.