.push() multiple objects into JavaScript array returns 'undefined'

Question

When I add items to the beats array and then console.log the User, I\'m getting the correct number of items in the array. But when I check .length, I always get 1. Trying to ca

Answer 1

Spread operator

In environments that support the spread operator you may now do the following:

this.addBeats = function (beats) {
    return this.beats.push(...beats);
};

Or if you need more control for overwriting etc

this.addBeats = function(beats) { 
    return this.beats.splice(this.beats.length, null, ...beats);
};