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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 false
enumerable false
configurable true

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)
RegExp.prototype.flags
Standard 初始定义。
ECMAScript Latest Draft (ECMA-262)
RegExp.prototype.flags
Draft  

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 37 (37) 未实现 未实现 未实现
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 未实现 未实现 37.0 (37) 未实现 未实现 未实现

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