RegExp.prototype.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 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

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Basic support 未实现 未实现 37.0 (37) 未实现 未实现 未实现

另见