declare var global: NodeJS.Global; (global as any).requestAnimationFrame = (callback: any) => { setTimeout(callback, 0); }; (Promise.prototype as any).finally = function(onFinally: any) { return this.then( /* onFulfilled */ (res: any) => Promise.resolve(onFinally()).then(() => res), /* onRejected */ (err: any) => Promise.resolve(onFinally()).then(() => { throw err; }) ); };