social-media/src/typings.d.ts

// Typings reference file, you can add your own global typings here
// https://www.typescriptlang.org/docs/handbook/writing-declaration-files.html
interface JQuery  {
    scrollspy(options: Object): JQuery;
    affix(options: Object): JQuery;
    magnificPopup(options: Object): JQuery;
    modal(action:string): JQuery;
}

declare var System: any;