How to split large file into many angular files, while remaining in the same class?

C# has partial classes and in one class to keep a lot of data in different files.
Why I don't want to create subclasses and to invest them? it is difficult to communicate the hierarchy top-down. And in Typescript and Angular I have not found someone like me a huge file split into parts so, like all methods are in one place.
Prompt, how such to implement?
April 19th 20 at 12:28

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April 19th 20 at 12:30
Does
April 19th 20 at 12:32
For something like that, you can use mixins, using Kukui thread libraries or directly.
It's not exactly and crutches, but there is nothing better.

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