regExp.flags
flags属性返回一个字符串，由当前正则表达式对象的标志组成。
| RegExp.prototype.flags属性的属性特性 |
|:----|
| Writable | no |
| Enumerable | no |
| Configurable | yes |
描述
flags属性中的标志以字典序排序（从左到右，即"gimuy"）。
示例
使用flags
/foo/ig.flags; // "gi"
/bar/myu.flags; // "muy"Polyfill
if (RegExp.prototype.flags === undefined) {
Object.defineProperty(RegExp.prototype, 'flags', {
configurable: true,
get: function() {
return this.toString().match(/[gimuy]*$/)[0];
}
});
}规范
Specification | Status | Comment |
|---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'RegExp.prototype.flags' in that specification. | Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262)The definition of 'RegExp.prototype.flags' in that specification. | Draft | |
浏览器兼容性
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | 37 (37) | No support | No support | No support |
Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
Basic support | No support | No support | (Yes) | 37.0 (37) | No support | No support | No support |
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