Meaning Of A Double Star (**) In A File Path

I was reading here on Stack Overflow about ** in a path, as in this example: src/js/**/*.js I would like to ask if ' ** ' means 'any nested directory' please?!

Solution 1:

The double star in this case means all folders within the current folder, with the current folder being src/js

So in full, find all files with a .js extension, in all subfolders of src/js

Solution 2:

The double asterisks are placeholders or instructions to the recursive interpreter to go through the files and folders. It is a simple, recursive wildcard while only one asterisk means all without recursion.

'**/*.js'; All files with the extension .js from here onwards.

'lib/**/*.js'; All files with the extension .js in the folder lib and its subfolders.

'js/**'; All files in the folder js and its subfolders.