npm i @spfxappdev/framework
Please install the @microsoft/sp-webpart-base, @microsoft/sp-application-base and @microsoft/decorators as development dependencies:
npm i --save-dev @microsoft/sp-webpart-base
npm i --save-dev @microsoft/sp-application-base
npm i --save-dev @microsoft/decorators
If you get some errors with Promises and the missing "finally"-Methode, install npm i --save-dev @types/es6-promise@0.0.32 as well.
TBD
For examples or documentation see GitHub repository