JavaScript RegExp ignoreCase Property

ignoreCaseThe property indicates whether the regular expression uses the " i ”flag (modifier).

It is true if the 'i' modifier is set; otherwise, it is false

Syntax:

regex.ignoreCase

Example

var str = "HELLO WORLD";
var regex =　/Hello/i;
regex.ignoreCase;　　　//　true

All browsers fully support the ignoreCase property:

Properties
ignoreCase	Yes	Yes	Yes	Yes	Yes

Writable:	No
Enumerable:	No
Configurable:	Yes
Return Value:	It is true if the 'i' modifier is set; otherwise, it is false
JavaScript Version:	ECMAScript 1