You don't have the last version of typescript.
Running :
npm install -g typescript
npm
checks if tsc
command is already installed.
And it might be, by another software like Visual Studio
. If so, npm
doesn't override it. So you have to remove the previous deprecated tsc
installed command.
Run where tsc
to know its bin location. It should be in C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.0\
in windows. Once found, delete the folder, and re-run npm install -g typescript
. This should now install the last version of typescript.