angular 2 typescript An implementation cannot be declared in ambient contexts

Question

I am new to typescript and I am trying to create a function for an angular 2 directive. Can anyone explain, in language for n00bs, what the error is trying to tell me when I

Answer 1

I think this happened to me, because I accidentally edited one of the files in node_modules. This fixed it for me:

rm -r node_modules
npm install

Answer 2

I ran across this rather unusual compile-time Typescript error error TS1183: An implementation cannot be declared in ambient contexts.

It started after I had copy/pasted some sourcecode that had export declare class. I noticed when I changed it to export class this error went away.

Change This:

export declare class Foo {
}

To This:

export class Foo {
}

Answer 3

error TS1183: An implementation cannot be declared in ambient contexts. Solution :Removed node module and reinstall it.

Answer 4

I had the same error and fixed it by typing:

npm install --save typescript@latest

package.json now has the latest ts version and ts compiler is 2.2.2.

Answer 5

An implementation cannot be declared in ambient contexts

You most probably have your file named as foo.d.ts instead of foo.ts. That marks it as a declaration file (more on that https://basarat.gitbooks.io/typescript/content/docs/types/ambient/d.ts.html) and you cannot put logic in these as you are declaring what logic exists elsewhere.

Answer 6

I fixed it by doing: npm install rxjs