Finding the difference between two string in Javascript with regex [closed]

Answer 1

To find out if there are extra '.' like you are asking for, you can do this:

result = "$1...00".match(/\$1\.(\.*)?00/)[1];

result is then the EXTRA '.'s found. You cannot use regex to compare strings using only regex. Perhaps use this, then compare the results.

You can also try this:

result = "$1...00".match(/(\$)(\d+)\.(\.*)?(\d+)/);
// Outputs: ["$1...00", "$", "1", "..", "00"]

Which will extract the various parts to compare.