JavaScript – RegExp Group [0-9]
The JavaScript RegExp Group [0-9] searches for a specific number in a string.
JavaScript – RegExp Group [^0-9]
The JavaScript RegExp Group [^0-9] searches for a specific number NOT in a string.
JavaScript – RegExp Group [abc]
The JavaScript RegExp Group [abc] searches for a specific character in a string.
JavaScript – RegExp Group [^abc]
The JavaScript RegExp Group [^abc] searches for a specific character NOT in a string.
JavaScript – RegExp Group (x|y)
The JavaScript RegExp Group (x|y) expression is used to find ANY of the alternatives specified.