Generally, when you compile TypeScript aapp.ts file, it generatesapp.js andapp.js.map files. TheNavigator Explorer displays the 3 files in the same hierarchy:

If you useProject Explorer, you can see the compiled filesapp.js andapp.js.map inside theapp.ts:

This behaviour comes from thatTypeScript Elements content is checked (only available forProject Explorer). You can disable it, by configuring theProject Explorer withCustom View menu:

And selectContent tab:

You can hide theapp.js andapp.js.map which are hosted in the same folder thanapp.ts:

To do that, you must check theTypeScript filter (available with theCustom View menu):

When your project follows theTypeScript Nature rule, theProject Explorer displays theTypeScript Resources node:

SeeBuild Path for more information.