They both seem to work but I have been told you should use both when you\'re forming a RegExp?
\s matches a single whitespace character, which includes spaces, tabs, form feeds, line feeds and other unicode spaces.
\t Matches a single tab.
If you are using \s, you don't need to include \t.
More information on regex patterns here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp