JavaScript (ES2026) reference · String Methods

JavaScript String slice() Method

Extract part of a string between two indexes; negative indexes count from the end.

JavaScript (ES2026) Since ES3

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Syntax

string.slice(start, end)

Parameter	Description
`start`	Index to start at (negative counts from the end).
`end` optional	Index to stop before. Default: `string.length`

A new string.

Different rangesTry it yourself

const s = "JavaScript";
console.log(s.slice(0, 4), s.slice(4), s.slice(-6), s.slice(-6, -3));

Output

Java Script Script Scr

Truncate with an ellipsisTry it yourself

const text = "A very long product description";
console.log(text.length > 15 ? text.slice(0, 15) + "…" : text);

Output

A very long pro…

Version	Change
JavaScript ES3	Added

string.substring() · Return the part of a string between two indexes. Unlike slice(), negative values become 0 and swapped arguments are reordered.
string.at() · Return the character at an index, where negative indexes count from the end: str.at(-1) is the last character.
array.slice() · Return a shallow copy of part of the array, from start up to (not including) end. The original is not changed.
JavaScript Strings · tutorial
JavaScript String Methods · tutorial