Tutorial by Examples

If you have a type definition file (d.ts) for the module, you can use an import statement. import _ = require('lodash'); If you don't have a definition file for the module, TypeScript will throw an error on compilation because it cannot find the module you are trying to import. In this case, yo...

for typescript 2.x: definitions from DefinitelyTyped are available via @types npm package npm i --save lodash npm i --save-dev @types/lodash but in case if you want use types from other repos then can be used old way: for typescript 1.x: Typings is an npm package that can automatically insta...

Although modules are ideal, if the library you are using is referenced by a global variable (like $ or _), because it was loaded by a script tag, you can create an ambient declaration in order to refer to it: declare const _: any;

With the 2.x versions of typescript, typings are now available from the npm @types repository. These are automatically resolved by the typescript compiler and are much simpler to use. To install a type definition you simply install it as a dev dependency in your projects package.json e.g. npm i -...