String.prototype.split() - JavaScript | MDN

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regular expression

The pattern describing where each split should occur. Can be undefined, a string, or an object with a Symbol.split method — the typical example being a regular expression. Omitting separator or passing undefined causes s

coerced to strings

The pattern describing where each split should occur. Can be undefined, a string, or an object with a Symbol.split method — the typical example being a regular expression. Omitting separator or passing undefined causes s

Regular expressions

String.prototype.charAt()

String.prototype.indexOf()

String.prototype.lastIndexOf()

Array.prototype.join()

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This page was last modified on Jul 10, 2025 by MDN contributors.

toLocaleLowerCase()

toLocaleUpperCase()

[Symbol.iterator]()

[Symbol.hasInstance]()

__defineGetter__()

__defineSetter__()

__lookupGetter__()

__lookupSetter__()