How do I represent a "standard" Javascript object constructor (new ()) in TypeScript when I can't modify the original Javascript? -

i'm working on project add type annotations (a .d.ts file) large existing javascript code base. .d.ts file live alongside javascript, can't make changes javascript support project.

in existing code, there's this:

...

window.myglobal.service = function () {  } window.myglobal.service.prototype = {    baseurl: 'http://...'; } 

...

with expectation we'll later

var svc = new window.myglobal.service(); 

i can't figure out how represent in typescript. have

interface service {     baseurl: string; } 

but i'm not sure put in interface myglobal. i've tried

interface myglobal {      service: service; } 

but can't use new() on that. can change

interface myglobal {     service(): void; } 

and let me use new(); loses type information service interface.

is possible handle situation in typescript?

option 1:

declare module myglobal {     class service {         baseurl: string;     }    }  interface window {     myglobal: { service: myglobal.service; }     }  var svc = new window.myglobal.service(); var x = svc.baseurl; 

option 2:

declare module myglobal {     interface service {         baseurl: string;     }    }  interface window {     myglobal: { service: { new(): myglobal.service } }   }  var svc = new window.myglobal.service(); var x = svc.baseurl;