ts-toolbelt-demo.ts

import {Object, Tuple, Number} from 'ts-toolbelt'

// Merge two types together
type merge = Object.MergeUp<{name: string}, {age?: number}>

// Update the type of a field
type update = Object.Update<{age: string}, 'age', number>

// Make some fields optional
type optional = Object.Optional<{name: string, age: number}, 'age'>

// Update a type at any depth! (`P` stands for `Path`)
type deepUpdate = Object.P.Update<{a: {b: {c: 1}}}, ['a', 'b', 'c'], 42>

// Concat two tuples together
type concat = Tuple.Concat<[1, 2], [3, 4]>

// Add two numbers together
type add = Number.Plus<'10', '-21'>

// And much more... Check the docs out!