JS: Regex Functions

Here is a overview of regex functions.

Best Function to Use

str.matchAll(regex)

Return all occurrences and captures.

• JS: String.prototype.matchAll

str.replaceAll(regex, rep)

Return a new string.

• JS: String.prototype.replaceAll

Older Functions

str.search(regex)

Return the index of first char of the match.

• JS: String.prototype.search

str.match(regex)

• Return all occurrences (if regex has g flag)
• or return captured groups (if regex has no g flag).

• JS: String.prototype.match

str.replace(regex, rep)

Return a new string.

• JS: String.prototype.replace

regex.test(str)

Return true/false.

• JS: RegExp.prototype.test

regex.exec(str)

Return captured groups.

• JS: RegExp.prototype.exec