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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
| Specification | Status | Comment |
|---|---|---|
| ECMAScript 3rd Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.2. JavaScript 1.5: ignoreCase is a property of a RegExp instance, not the RegExp object. |
| ECMAScript 5.1 (ECMA-262) The definition of 'RegExp.prototype.ignoreCase' in that specification. |
Standard | |
| ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'RegExp.prototype.ignoreCase' in that specification. |
Standard | ignoreCase is now a prototype accessor property rather than an instance's own data property. |
| ECMAScript 2017 Draft (ECMA-262) The definition of 'RegExp.prototype.ignoreCase' in that specification. |
Draft |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Prototype accessor property | ? | 38 (38) | ? | ? | ? |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Prototype accessor property | ? | ? | 38.0 (38) | ? | ? | ? |