Symbol.search

Symbol.search 静态数据属性代表 众所周知的符号 Symbol.search。String.prototype.search() 方法在其第一个参数上查找此符号，以查找返回与当前对象匹配的字符串中的索引的方法。

¥The Symbol.search static data property represents the well-known symbol Symbol.search. The String.prototype.search() method looks up this symbol on its first argument for the method that returns the index within a string that matches the current object.

有关详细信息，请参阅 RegExp.prototype[Symbol.search]() 和 String.prototype.search()。

¥For more information, see RegExp.prototype[Symbol.search]() and String.prototype.search().

class caseInsensitiveSearch {
  constructor(value) {
    this.value = value.toLowerCase();
  }
  [Symbol.search](string) {
    return string.toLowerCase().indexOf(this.value);
  }
}

console.log("foobar".search(new caseInsensitiveSearch("BaR"))); // 3

¥Specifications

¥Browser compatibility