JavaScript (ES2026) reference · String Methods

JavaScript String trimStart() Method

Remove whitespace (spaces, tabs, line breaks) from the start of a string only, leaving the end untouched.

JavaScript (ES2026) Since ES2019

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Syntax

string.trimStart()

A new string.

Trim the startTry it yourself

console.log(JSON.stringify("  text  ".trimStart()));

Output

"text  "

Measure indentationTry it yourself

const code = "    return x;";
console.log(code.length - code.trimStart().length, "spaces of indentation");

Output

4 spaces of indentation

Version	Change
JavaScript ES2019	Added

string.trim() · Remove whitespace (spaces, tabs, line breaks) from both ends of a string.
string.trimEnd() · Remove whitespace (spaces, tabs, line breaks) from the end of a string only, leaving the start untouched.
JavaScript Strings · tutorial
JavaScript String Methods · tutorial