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Perfmatters website says:
Turn off combine/compilers#
For Delay JavaScript to work properly in Perfmatters, you need to turn off any feature from third-party plugins that combine your JavaScript files. Combining JavaScript is a deprecated optimization technique since HTTP/2 (now HTTP/3) anyways. It’s now faster to load individual files in parallel.
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If you’re using Autoptimize, LiteSpeed, WP Rocket, etc., turn off JavaScript combine.
If you’re using Avada, turn off the JS Compiler feature.
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[https://perfmatters.io/docs/delay-javascript/?ref=146]) [ad_2]
I don’t think it automatically does. There’s an option to do so when setting up a domain though.