ES6 as the typescript target compiler option for angularjs or angular2

Question

The compiler option for my angularjs application is as below. Should I use any other package to transpile es6 to es5 again

Answer 1

The answer from Evan Plaice was good but it is now old (almost 18 months as of writing this). The compability table has changed a lot and it might be ok to target ES6 (ES2015) now. Check the table for the browsers you need to support.