RegExp.prototype.ignoreCase - JavaScript 编辑

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.

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The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

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
ECMAScript (ECMA-262) The definition of 'RegExp.prototype.ignoreCase' in that specification.

Browser compatibility

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See also

• RegExp.lastIndex
• RegExp.prototype.global
• RegExp.prototype.multiline
• RegExp.prototype.source
• RegExp.prototype.sticky