JavaScript compile () method

Usage
Regexpobject.compile (Regexp,modifier)
Used to compile regular expressions during script execution, and also to change and recompile regular expressions.
RegExp as regular expression
Modifier is the type of the specified match. "G" is used for global matching, "I" is used for case sensitivity, and "GI" is used for global case-sensitive matching.

Example:
Search for "Today" globally in the string and replace it with "tommorow".
Then, using the compile () method, change the regular expression and replace "rld" or "World" with "boat":

JavaScript compile () method