the implementation of regular expressions in javascript.

[letochagone]

I would like to have the texts explaining the implementation of regular expressions in javascript.
So in the following example:

"abc".match(/x*/g)

the result is an array : [ "", "", "", "" ],
4 empty strings.
The explanation is, perhaps, that Javascript finds empty strings in the following locations: (I note "-" for an empty string)
`

-A-B-C-

`
In short, what I'm looking for is where to find the link that explains this result, who decided on this result.

N.-B: I asked on stackoverflow but I didn't get the answer I was looking for.

[https://stackoverflow.com/questions/77047894/i-dont-understand-how-an-elementary-rational-expression-works]