JavaScript (ES2026) reference · String Methods

JavaScript String length Property

The number of UTF-16 code units in the string, which is more than the number of characters for emoji.

JavaScript (ES2026) Since ES1

Create a free account to save this page, take notes and track your progress. Sign in

Syntax

string.length

A non-negative integer.

Length in code unitsTry it yourself

console.log("camel".length, "".length, "\u{1F42B}".length);

Output

5 0 2

Counting charactersTry it yourself

const text = "hi \u{1F42B}";
console.log(text.length, [...text].length); // code units vs characters

Output

5 4

Version	Change
JavaScript ES1	Added

string.at() · Return the character at an index, where negative indexes count from the end: str.at(-1) is the last character.
string.split() · Split a string into an array of substrings at each separator (a string or regex), with an optional limit.
array.length · The number of elements in the array. Setting it shortens or extends the array.
JavaScript Strings · tutorial
JavaScript String Methods · tutorial