TypeScript needs to know that http
is present.
Updated
Install the type definitinos for node:
npm install @types/node
Old answer
Follows these two steps
- Download the
node.d.ts
file from here : https://github.com/borisyankov/DefinitelyTyped/tree/master/node -
At the top of your file add:
/// <reference path="node.d.ts" />
PS: See a sample test file : https://github.com/borisyankov/DefinitelyTyped/blob/master/node/node-tests.ts