Configure Visual Studio Code suggestions - visual-studio-code

Question

What's the best way to identify which Visual Studio Code setting is generating / allowing various suggestions to pop up (so it can be turned off)? In particular I'd like to eliminate these three from ever showing.

Answer 1

Those suggestions are types from the standard library. The TypeScript service that powers VS Code's JavaScript and TypeScript language features loads these types from .d.ts files in order to understand the signatures of standard JavaScript library functions such as parseInt or Promise.
To find out where a type is coming from, try using workspace symbol search (cmdT):
In this case, these types come from the standard lib.d.ts file that TypeScript loads automatically. TypeScript will also automatically load a d.ts file for the DOM api.
To disable these suggestions, create a jsconfig.json at the root of your project with the contents:
{
"compilerOptions": {
"lib": []
}
}
This tells typescript not to include any extra typings files for the core libraries. You can also select which typings you want to include:
{
"compilerOptions": {
"lib": [
"es2015"
]
}
}
See the documentation for a list of valid lib options
If you notice any bugs with this behavior or have any suggestions on how this could be improved, please file an issue against VS Code
Update
To discover where a type suggestion is coming from, you may also be able to write:
/**
* #type {AsyncResultObjectCallback}
*/
var placeholer;
And then run go to type definition on placeholder. Even using "lib": [], you may still be seeing suggestions from #types files or node packages that include d.ts files