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.

The Symbol.split static data property represents the well-known symbol Symbol.split. The String.prototype.split() method looks up this symbol on its first argument for the method that splits a string at the indices that match the current object.

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

Try it

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"

Value

The well-known symbol Symbol.split.

Property attributes of Symbol.split
Writableno
Enumerableno
Configurableno

Examples

Custom reverse split

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" ]

Specifications

Specification
ECMAScript® 2025 Language Specification
# sec-symbol.split

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
split

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also