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ts-toolbelt
Advanced tools
The ts-toolbelt package provides a comprehensive set of type utilities to improve TypeScript typing and enable type transformations, checks, and more complex operations. It enhances TypeScript's static typing capabilities and helps in building more robust type-safe applications.
Object Manipulation
Merge two types into one. This is useful for combining properties from multiple objects into a single type.
{ type Merged = Merge<{name: string}, {age: number}>; // Result: {name: string, age: number} }
Type Checking
Check if two types are equivalent. This utility helps in validating type structures for consistency.
{ type check = Equals<{a: string}, {a: string, b: number}>; // Result: false }
Conditional Types
Apply conditional logic to types. This feature allows for conditional type assignments based on certain conditions.
{ type Conditional = If<true, 'Yes', 'No'>; // Result: 'Yes' }
Provides a collection of utility types for TypeScript, similar to ts-toolbelt. While utility-types focuses more on transformations and mappings, ts-toolbelt offers a broader range of type operations including type checks and advanced manipulations.
A package that includes a variety of utility types for TypeScript. Type-fest is similar to ts-toolbelt but tends to be simpler and more focused on everyday use cases, whereas ts-toolbelt provides more comprehensive and complex utilities for advanced type manipulation.
npm install ts-toolbelt --save
yarn add ts-toolbelt
import * as T from 'ts-toolbelt'
// Do basic number operations
type test0 = T.N.Minus<'5', '20'> // -15
type O = {
a: {
b: {
c: 'hello'
d: 'goodbye'
}
}
}
// Deeply change a type
type test1 = T.O.P.Update<O, ['a', 'b', 'c' | 'd'], [1, 2, 3]>
// Or just merge them
type test2 = T.O.Merge<O, {x: 'hello'}>
And so much more... But before you start reading the docs:
The library is organized around TypeScript concepts:
type test3 = T.A.Is<'hello', string> // true
type test4 = T.A.Concat<[1, 2], [3, 4]> // [1, 2, 3, 4]
FAQs
TypeScript's largest utility library
The npm package ts-toolbelt receives a total of 2,022,480 weekly downloads. As such, ts-toolbelt popularity was classified as popular.
We found that ts-toolbelt demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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