Japanese version. The RegExp object in JavaScript is used to represent regular expressions, which are used for various string manipulation operations such as searching and replacing. The RegExp object is created by specifying a regular expression pattern. A regular expression pattern consists of the following elements: The RegExp object is created by specifying a string containing the regular expression pattern and optionally specifying pattern modifiers as an option. Here’s an example of creating a regular expression pattern using the RegExp object: In this example, we create a string containing the regular expression pattern “test”, and then create a RegExp object by specifying the pattern and the pattern modifiers gi, which … Continue reading regexp(JavaScript Variable data type)