Regular expression to remove a file's extension

Question

I am in need of a regular expression that can remove the extension of a filename, returning only the name of the file.

Here are some examples of inputs and outputs:<

Answer 1

The regular expression to match the pattern is:

/\.[^.]*$/

It finds a period character (\.), followed by 0 or more characters that are not periods ([^.]*), followed by the end of the string ($).

console.log( 
  "aaa.bbb.ccc".replace(/\.[^.]*$/,'')
)