How to remove trailing whitespace of all files recursively?

Question

How can you remove all of the trailing whitespace of an entire project? Starting at a root directory, and removing the trailing whitespace from all files in all folders.

Answer 1

I use regular expressions. 4 steps:

1. Open the root folder in your editor (I use Visual Studio Code).
2. Tap the Search icon on the left, and enable the regular expression mode.
3. Enter " +\n" in the Search bar and "\n" in the Replace bar.
4. Click "Replace All".

This removes all trailing spaces at the end of each line in all files. And you can exclude some files that don't fit with this need.