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JavaScript

JavaScript String Methods

JavaScript string methods alter text automatically.

Read Time

5 min read

Difficulty

Beginner

Last Updated

Jun 15, 2026

Version

v1.0.0

Introduction

JavaScript provides built-in tools called methods to manipulate strings. Developers use these methods to change text to uppercase, replace specific words, or extract a small section of a larger paragraph.

Example

1/* this uses string methods */
2let text = "Apple, Banana";
3let part = text.slice(7, 13); // part is "Banana"
4let loud = text.toUpperCase();

Key Points

The `toUpperCase()` method capitalizes every letter.
The `slice()` method extracts a section of text.
The `replace()` method swaps one word for another.
The `trim()` method removes extra spaces at the ends.

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