An array with fixed types and order.

Tuple has fixed structure, array is dynamic.

TypeScript Tuples - Learn TYPESCRIPT | Revochamp

Name: TypeScript Tuples
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Author: Revochamp

What is a Tuple?

A tuple in TypeScript is a special type of array with a fixed number of elements and predefined types for each position.

Basic Example

TypeScriptRead-only

let user: [string, number] = ['John', 30];

let user: [string, number] = ['John', 30];

Access Tuple Values

TypeScriptRead-only

console.log(user[0]); // John
console.log(user[1]); // 30

console.log(user[0]); // John
console.log(user[1]); // 30

Named Tuples

TypeScriptRead-only

let user: [name: string, age: number] = ['John', 30];

let user: [name: string, age: number] = ['John', 30];

Optional Tuple Elements

TypeScriptRead-only

let user: [string, number?] = ['John'];

let user: [string, number?] = ['John'];

Tuple with Rest

TypeScriptRead-only

let data: [string, ...number[]] = ['A', 1, 2, 3];

let data: [string, ...number[]] = ['A', 1, 2, 3];

Tuple vs Array

Feature	Tuple	Array
Length	Fixed	Dynamic
Types	Fixed order	Same type
Usage	Structured data	List of values

Best Practices

Use tuples for fixed structure data
Keep tuple size small
Use named tuples for readability
Avoid overly complex tuples

Common Mistakes

Using tuples like arrays
Ignoring tuple order
Adding extra elements incorrectly
Overusing tuples instead of objects

Conclusion

Tuples are useful for representing fixed, structured data in TypeScript, improving clarity and type safety.

Feature

Tuple

Array

Length

Fixed

Dynamic

Types

Fixed order

Same type

Usage

Structured data

List of values

TypeScript Tuples

TypeScript Tuples

What is a Tuple?

Basic Example

Access Tuple Values

Named Tuples

Optional Tuple Elements

Tuple with Rest

Tuple vs Array

Best Practices

Common Mistakes

Conclusion

Try it yourself

Test Your Knowledge

Frequently Asked Questions

Need help?

TypeScript Tuples

TypeScript Tuples

What is a Tuple?

Basic Example

Access Tuple Values

Named Tuples

Optional Tuple Elements

Tuple with Rest

Tuple vs Array

Best Practices

Common Mistakes

Conclusion

Try it yourself

Test Your Knowledge

Frequently Asked Questions

Need help?