Google has up to date the Googlebot assist doc on crawling to make clear that the 15MB fetch measurement restrict applies to every fetch of the person subresources referenced within the HTML as nicely, reminiscent of JavaScript and CSS recordsdata.

Google initially added details about this 15MB restrict a number of months in the past, which brought about plenty of concern within the search engine marketing trade, so be sure to learn that story.

The assist doc now reads:

Googlebot can crawl the primary 15MB of an HTML file or supported text-based file. Every useful resource referenced within the HTML reminiscent of CSS and JavaScript is fetched individually, and every fetch is certain by the identical file measurement restrict. After the primary 15MB of the file, Googlebot stops crawling and solely considers the primary 15MB of the file for indexing. The file measurement restrict is utilized on the uncompressed information. Different Google crawlers, for instance Googlebot Video and Googlebot Picture, might have completely different limits.

It beforehand learn:

Googlebot can crawl the primary 15MB of an HTML file or supported text-based file. Any assets referenced within the HTML reminiscent of pictures, movies, CSS, and JavaScript are fetched individually. After the primary 15MB of the file, Googlebot stops crawling and solely considers the primary 15MB of the file for indexing. The file measurement restrict is utilized on the uncompressed information. Different Google crawlers might have completely different limits.

Gary added on LinkedIn, “PSA from my inbox: The 15MB useful resource fetch threshold applies on the JavaScript assets, too, so in case your JavaScript recordsdata are bigger than that, your web site may need a nasty time in Google Search. See googlebot.com for details about the fetch options and limitations. Sure, there are JavaScript assets on the market which are bigger than 15MB. No, it isn’t a good suggestion to have JavaScript recordsdata which are that enormous.”

Listed here are some feedback on early suggestions from the search engine marketing neighborhood on this:

Are you operating into 15mb Don measurement? That is fairly a bit.

— johnmu is just not a chatbot but 🐀 (@JohnMu) March 19, 2023

The 15mb is nearly fetching, it’s very separate from the indexing aspect.

— johnmu is just not a chatbot but 🐀 (@JohnMu) March 19, 2023

Discussion board dialogue at LinkedIn.