Error: Initializers are not allowed in ambient contexts

Question

I upgraded my Angular version from version 2.4.0 to 4.0.0 while compiling, I am getting following errors.

How can I resolve those errors?

Answer 1

For me, this problem was caused by The Visual Studio project file referencing the wrong TypeScript compiler version - see my answer at https://stackoverflow.com/a/43963664/236860 and Allen Conway's excellent post.