typescript variable number of parameters in function interface definition 0.9.5

Question

I have this scenario, the file is t.ts:

interface Itest{
   (event: any, ...args: any[]):any;
   }

   var t1: Itest = function (testparam) { return true;};
   v         


        

Answer 1

Since rest parameters are optional, you need to make them optional in your functions as well:

   interface Itest{
   (event: any, ...args: any[]):any;
   }

   var t1: Itest = function (testparam?) { return true;};
   var t2: Itest = function (testparam?, para1?) { return true; };
   var t3: Itest = function (testparam?, para1?, para2?) { return true; };


   interface Itest2 {
     (event: any, para1,...args: any[]): any;
   }
   var t4: Itest2 = function (testparam, para1) { return true; };
   var t5: Itest2 = function (testparam, para1, para2?) { return true; };

This is new in TS0.9.5