How to insert text at an arbitrary location in a file using createWriteStream in NodeJS?

Question

JavaScript

Tell me, in the API, createWriteStreamthere is, option > {start: position, flags: "a"}but all the contents in the file are replaced and not inserted into a specific place.
I insert data using stream.write('Данные которые нужно вставить')
how to be?

Answer 1

Files are arranged in such a way that it is impossible to insert something into them in some place without overwriting what was in this place.
In order not to overwrite the entire file at the same time (but only what was in a certain place) - open it in r + mode