Scripting API docs

I would like to have a better Minecraft API Documentation. I am a developer but JavaScript is new to me and the Documentation doesn't help much.

Currently i can't see any code completion and the examples doesn't work out of the box. sometimes i get a TypeError, and sometimes its just silent which means probalby a JS error somewhere. Its mostly about typing random things blindly.

There is no validation   Youtube or https://minecraft.gamepedia.com/Bedrock_Edition_beta_scripting_documentation doesn't help much.

Is there any way where i can have a technical API documentation with the exact types and parameters? or is there a way where i can explore the code by myself?

How can i stabalize my script?

Also if you need help, i am heppy if i can help somewhere. just want to understand whats going on and how to start coding  

 

Btw when is BE not Beta anymore?