Hello this is a tutorial reviewing regex, which is short for regular expression. Regex is a sequence of characters that defines a specific search pattern. When included in code or search algorithms, regular expressions can be used to find certain patterns of characters within a string, or to find and replace a character or sequence of characters within a string. They are also frequently used to validate input.
Matching an HTML Tag: /^<([a-z]+)([^<]+)*(?:>(.*)<\/\1>|\s+\/>)$/
One of the more useful regexes on the list. It matches any HTML tag with the content inside. As usually, we begin with the start of the line.