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regExp.ignoreCase

The ignoreCase property indicates whether or not the "i" flag is used with the regular expression. ignoreCase is a read-only property of an individual regular expression instance.

Property attributes of RegExp.prototype.ignoreCase
Writable no
Enumerable no
Configurable yes

Description

The value of ignoreCase is a Boolean and true if the "i" flag was used; otherwise, false. The "i" flag indicates that case should be ignored while attempting a match in a string.

You cannot change this property directly.

Examples

Using ignoreCase

var regex = new RegExp('foo', 'i');

console.log(regex.ignoreCase); // true

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
ignoreCase 1 12 1 5.5 5 1
Prototype accessor property (ES2015) 48 12 38 5.5 35 1.3
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
ignoreCase 1 18 4 10.1 1 1.0
Prototype accessor property (ES2015) 48 48 38 35 1 5.0
Server
Node.js
ignoreCase 0.1.100
Prototype accessor property (ES2015) 6.0.0

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/ignoreCase