FAQ: Types - Variable Type Annotations

This community-built FAQ covers the “Variable Type Annotations” exercise from the lesson “Types”.

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This exercise can be found in the following Codecademy content:

Learn TypeScript

FAQs on the exercise Variable Type Annotations

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This part in the text i find a bit odd:

“By the way, don’t worry about the type annotations making your code ugly or hard for others to understand; they get automatically removed when compiled to JavaScript.”

When a program is written in Typescript, isn’t it the case that only the .ts files are used by developers and the .js files are used by the browser?
In other words, developers do not use the .js files but only the .ts files and there annotations are not removed.
So yes, annotations are removed but that is not useful for developers because they only use the ts files.

Or am i wrong about this?