What is a good regular expression to match a URL?

regex = “((http|https)://)(www.)? ”

Can you use regex in URL?

A Regular Expression, REGEX, is a special text string for describing a search pattern. Within Hotjar, you can define a Regular Expression to target a specific string or pattern within URLs for all of our tools, as well as block IP addresses in your Hotjar dashboard.

What is regex matches?

In regular expression syntax the period . mean “match any character” and the asterisk * means “any number of times”. So it basically means match anything (even an empty string). It shouldn’t filter out anything.

How do you match in RegEx?

Syntax: How to Match a String to a Regular Expression

1. .
2. * represents zero or more occurrences.
3. + represents one or more occurrences.
4. ?
5. ^ represents beginning of line.
6. $ represents end of line.
7. [] represents any one character in the set listed within the brackets.

How do you match a URL?

To match the beginning of a URL, add the caret (^) character to the start of the pattern….Using the prefix option.

Format	^://
Example	^http://www.example
Matching URLs	http://www.example.com/ http://www.example.de/ http://www.example.co.jp/

What is regex matching GTM?

The “matches regex” option allows you to implement regular expressions in Google Tag Manager for matching text patterns. Regex is useful for expressing more complex types of rules such as “fire the tag when the URL starts with A and ends in B or C.”

How do you match a word in regex?

Matching Word Characters You can match word characters with the predefined character class with the code \w . The word character class corresponds to the character class [a-zA-Z_0-9] . String regex = “Hi\\w”; This regular expression will match any string that starts with “Hi” followed by a single word character.