Check TypeScript Definitions

Services & Skills

Share on

check-dts becomes especially useful for testing libraries with with TypeScript generics, like the ones we have in Nano Events or Storeon.

// Negative test: test/index.errors.ts
import lib = require('../')

interface Events {
  'set': (a: string, b: number) => void
}
// THROWS Expected 3 arguments, but got 2
lib.on<Events>('set', 2)
// Positive test: test/index.types.ts
import lib = require('../')

interface Events {
  'set': (a: string, b: number) => void
}
lib.on<Events>('set', 'prop', 1)
Print Snapshots example
Author

In the same orbit

Explore more open source projects

Contact us

We’d love to hear from you! We’re not really all that evil, and we love discussing potential projects, intriguing ideas, and new opportunities. Complete the form below or drop us a line at surrender@evilmartians.com.

Martians at a glance
16
years in business

A product development consultancy that works with startups and established businesses, while also creating open source-based products and services