RegExp.prototype.ignoreCase - JavaScript 编辑

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 2015 (6th Edition, ECMA-262) RegExp.prototype.ignoreCase	Standard	ignoreCase is now a prototype accessor property rather than an instance's own data property.

浏览器兼容性

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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)

相关链接

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