JavaScript (ES2026) reference · String Methods

JavaScript String split() Method

Split a string into an array of substrings at each separator (a string or regex), with an optional limit.

JavaScript (ES2026) Since ES3

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Syntax

string.split(separator, limit)

Parameter	Description
`separator`	A string or regular expression.
`limit` optional	Maximum number of pieces.

An array of strings.

Common separatorsTry it yourself

console.log("a,b,,c".split(","));
console.log("one  two   three".split(/\s+/));
console.log("abc".split(""));

Output

[ 'a', 'b', '', 'c' ]
[ 'one', 'two', 'three' ]
[ 'a', 'b', 'c' ]

Split once, or with a limitTry it yourself

const [key, ...rest] = "name=Ada=Lovelace".split("=");
console.log(key, rest.join("="));
console.log("a b c d".split(" ", 2));

Output

name Ada=Lovelace
[ 'a', 'b' ]

Version	Change
JavaScript ES3	Added

array.join() · Join all elements into one string, separated by commas or by a separator you choose.
string.slice() · Extract part of a string between two indexes; negative indexes count from the end.
string.trim() · Remove whitespace (spaces, tabs, line breaks) from both ends of a string.
JavaScript Strings · tutorial
JavaScript String Methods · tutorial