You can use the following flags on any regular expression:

• g: matches the pattern multiple times
• i: makes the regex case insensitive
• m: enables multiline mode. In this mode, ^ and $ match the start and end of each line. Without it, they match only the beginning and end of the whole string.
• u: enables support for Unicode (introduced in ES6/ES2015)
• s: short for single line, it causes the . to match newline characters as well

Flags can be combined, and they are added at the end of the pattern in regex literals:

/hey/ig.test('HEy') //✅

or as the second parameter of the RegExp constructor:

new RegExp('hey', 'ig').test('HEy') //✅

Lessons in this unit:

0:	Introduction
1:	Introduction
2:	Anchoring
3:	Match Items in Ranges
4:	Matching a Range Item Multiple Times
5:	Negating a Pattern
6:	Meta Characters
7:	Regular Expressions Choices
8:	Quantifiers
9:	Optional Items
10:	Groups
11:	Capturing Groups
12:	Using match and exec Without Groups
13:	Noncapturing Groups
14:	▶︎ Flags
15:	Inspecting a Regex
16:	Escaping
17:	String Boundaries
18:	Replacing
19:	Greediness
20:	Lookaheads
21:	Lookbehinds
22:	Unicode
23:	Unicode Property Escapes
24:	Examples