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) |