Finding Forge API/ coding "manual"

[Solarient]

I have had a good amount of experience to the Java Script Syntax, but I am itching to find the actual forge API to make GUI's. 
Where would I find this? 

 

One more question!

I am coding in forge 1.15.2 for a mod, say I were to upgrade to 1.16.1, would the API change in anyway? if so, what were the changes.

 

Sorry if my questions don't make a lot of sense, I'm new to coding with forge.

[Minuuoo97]

Discussions were already made in the topic linked above. I hope you can find an answer there.

 

And Forge does change with Minecraft updates. You need to check the details each time.

[Solarient]

7 minutes ago, Minuuoo97 said:

Discussions were already made in the topic linked above. I hope you can find an answer there.

 

And Forge does change with Minecraft updates. You need to check the details each time.

Thank you!

[Blazer Nitrox]

5 hours ago, Solarient said:

One more question!

I am coding in forge 1.15.2 for a mod, say I were to upgrade to 1.16.1, would the API change in anyway? if so, what were the changes.

There are absolute gods out there who occasionally make a TL;DR of the Forge changes and how to update to the newest version. 1.16 is still hot off the presses so it'll probably be a bit, but you can always download the MDK and troll through the provided code; except in rare circumstances (1.7 to 1.8, and 1.12 to 1.13) the changes are usually pretty small.