How to edit and live preview the web ui

Questions
1

So I’m trying to follow the instructions for editing the web ui in platformio…
https://kno.wled.ge/advanced/custom-features/#changing-web-ui

I can locate the htm etc. in the wled/data/ folder but I’m not sure how to run an instance of WLED that works directly with these files.
“If you want to test changes to the UI, it is easiest to work with the local wled00/data/index.htm file. You just need to enter the IP address of a WLED 0.10.0 or newer instance into the popup”
What “popup” does the above refer to? I tried opening the index.htm with the live server but this isn’t any use.

Screenshot 2023-10-01 11.01.59
Screenshot 2023-10-01 11.01.59844×509 34.5 KB

2

Turns out you just open the index.htm file from its location in the project data directory from a file explorer.

I must have fumbled it somehow, when trying it the for first time, because just opening from local file still gave me the same results until I cleared the local storage (also described on the changing-web-ui web page). Not sure how that happened as I was just mistakenly trying to use the live Server in Visual Studio.