Regular expression - MDN Web Docs Glossary: Definitions of Web-related terms 编辑

Regular expressions (or regex) are rules that govern which sequences of characters come up in a search.

Regular expressions are implemented in various languages, but the best-known implementation is the Perl Implementation, which has given rise to its own ecosystem of implementations called PCRE (Perl Compatible Regular Expression). On the Web, JavaScript provides another regex implementation through the RegExp object.

Learn more

General knowledge

• Regular expressions on Wikipedia
• Interactive tutorial
• Visualized Regular Expression

Technical reference

• Writing regular expressions in JavaScript