What is a regular expression (Regex)?

A regular expression is a sequence of characters that forms a search pattern, used for string matching, search and replace operations, and data validations.

What does the Global (g) flag do?

The global flag causes the regular expression to match all occurrences in the subject string, rather than stopping after the first match.

Regex Tester

Online Regular Expression (Regex) tester. Write patterns, apply global, case-insensitive, or multiline flags, and view matching capture groups instantly.

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