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