npm install --save @types/uglify-js
This package contains type definitions for uglify-js (https://github.com/mishoo/UglifyJS).
Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/uglify-js.
These definitions were written by Alan Agius, Tanguy Krotoff, John Reilly, and Piotr Błażejewicz.