Foundry VTT Types
Compiled types from FoundryVTT, working on a way to automate it but this should get you started. Note, this may not be complete as its all the generated types in the client directory. I am also working on getting this automated for any new releases.
Installation
NPM
npm install -D foundryvtt-types
Yarn
yarn add -D foundryvtt-types
Setup
After installation you have to add the following to your tsconfig.json
{
"types": ["./node_modules/foundryvtt-types"]
}