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概述

ignoreCase 属性表明正则表达式是否使用了 "i" 标志。ignoreCase 是正则表达式实例的只读属性。

RegExp.prototype.ignoreCase 属性的属性特性:
writable false
enumerable false
configurable false

描述

ignoreCase 的值是布尔对象,如果使用了"i" 标志,则返回 true;否则,返回 false。"i" 标志意味着在字符串进行匹配时,应该忽略大小写。

你无法直接更改此属性。

示例

例子:使用 ignoreCase

var regex = new RegExp("foo", "i")

console.log(regex.ignoreCase) // true

规范

Specification Status Comment
ECMAScript 3rd Edition. Implemented in JavaScript 1.2. Standard Initial definition.
JavaScript 1.5: ignoreCase is a property of a RegExp instance, not the RegExp object.
ECMAScript 5.1 (ECMA-262)
RegExp.prototype.ignoreCase
Standard  
ECMAScript 6 (ECMA-262)
RegExp.prototype.ignoreCase
Release Candidate ignoreCase is now a prototype accessor property rather than an instance's own data property.

浏览器兼容性

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

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