The latest JavaScript specification standardizes a well-balanced and thoughtful set of features, including the built-in ...

The regular expressions /\s*,/ and /[\s\u200c]*$/ both give the engine license to keep checking whitespace characters as long as they are present and not followed by a comma or the end of the line, ...

Regular expressions are patterns that provide a powerful way to search and replace in text. In JavaScript, they are available via the RegExp object, as well as being integrated in methods of strings.

Regular expressions are patterns that provide a powerful way to search and replace in text. In JavaScript, they are available via the RegExp object, as well as being integrated in methods of strings.

That’s what [Low Level JavaScript] points out about regular expressions. Sure, a lot of people think they are scary. So why not write your own regular expression parser and engine ?

Meta-characters. There are special characters in regular expressions, some of them include: d matches any digit, equivalent to [0-9]; D matches any character that’s not a digit, equivalent to ...