Thought it was worth asking if anything can be done to look at putting some of this JavaScript on a diet as it can hurt mobile pagespeed which is most important for ranking. or a toggle to switch for sites that aren’t using any cornerstone legacy features.
I can see just scanning some of these javascript files cs-classic.js & x.js are sharing some code. Quite a bit according to page for a site I tested (might be different for people using legacy components) is not being used or for legacy browsers.
Anyway some stats below from pagespeed that might be useful
Thanks!
Forced reflow
A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.
| Source | Total reflow time |
|---|---|
| /cs-classic.7.7.4.js?ver=7.7.4 | 27 ms |
and maybe this
Reduce unused JavaScript
| URL | Transfer Size | Est Savings |
|---|---|---|
| /cs-classic.7.7.4.js?ver=7.7.4) | 34.9 KiB | 21.2 KiB |