Experimental decorators warning in TypeScript compilation

Question

I receive the warning...

Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option `to remove this warning.

... even though my compilerOptions in tsconfig.json have the following settings:

"emitDecoratorMetadata": true,
"experimentalDecorators": true,

What is weird is that some random classes that use decorators do not show that warning but the rest in the same project do.

What could cause such behavior in the TypeScript compiler?

Answer 1

Although VS Code is an excellent editor for TypeScript projects, it occasionally requires a jolt. Certain files frequently cause it to freak out and complain without warning. The most common solution appears to be to save and close all open files before opening tsconfig.json. After that, you should be able to reopen the problematic file without issue. If that fails, lather, rinse, and repeat.

If your tsconfig.json uses the files array to specify its source files, IntelliSense will only work if the file in question is referenced in such a way that VS Code can find it by traversing the input file tree.

Edit: The'reload window' command (added a long time ago) should resolve this issue once and for all.