{} + [] - why it is 0 or [object Object]?

Question

If you open a JS Console in your browser (in my case Chrome) and type:

{} + []

you will get 0, but when you type

console.lo         


        

Answer 1

it's because {} is an object notation so whatever you concatenate with {} it will give you an [object Object]. I your case [] is an empty so it just shows an [object Object]. so if you could try the following you will got what you want.

 console.log({} + 5);
 [object Object]5  ///console shows 
      //And
console.log({} + "test");
VM65:1 [object Object]test //console shows