Regular Expressions Matching Simple Patterns Matching leading/trailing whitespace
Example
Trailing spaces
\s*$: This will match any (*) whitespace (\s) at the end ($) of the text
Leading spaces
^\s*: This will match any (*) whitespace (\s) at the beginning (^) of the text
Remarks
\s is a common metacharacter for several RegExp engines, and is meant to capture whitespace characters (spaces, newlines and tabs for example). Note: it probably won't capture all the unicode space characters. Check your engines documentation to be sure about this.
