Let's say I have a array that contains a multiple object like:

var arr = [{ 'credit': 1, 'trash': null }, { 'credit': 2, 'trash': null}]

I want to get a sum of all credit value from arr array. so expected sum value is 3. so I used this code:

arr.reduce((obj, total) => obj.credit + total)

but when I run this, I get 1[object Object] which is really weird.

Ps: I'm trying to implement this using ES6 not ES5