Symbol.split
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.
Symbol.split 指向一个正则表达式的索引处分割字符串的方法。这个方法通过 String.prototype.split() 调用。
详情请参阅 RegExp.prototype[Symbol.split]() 和 String.prototype.split()。
尝试一下
class Split1 {
constructor(value) {
this.value = value;
}
[Symbol.split](string) {
const index = string.indexOf(this.value);
return `${this.value}${string.substring(0, index)}/${string.substring(
index + this.value.length,
)}`;
}
}
console.log("foobar".split(new Split1("foo")));
// Expected output: "foo/bar"
值
内置通用符号 Symbol.split。
Symbol.split 的属性特性 | |
|---|---|
| 可写 | 否 |
| 可枚举 | 否 |
| 可配置 | 否 |
示例
自定义反向分割
js
class ReverseSplit {
[Symbol.split](string) {
const array = string.split(" ");
return array.reverse();
}
}
console.log("Another one bites the dust".split(new ReverseSplit()));
// [ "dust", "the", "bites", "one", "Another" ]
规范
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-symbol.split |