Prototypal inheritance

buckets.js

function BucketCollector() {
  
}

BucketCollector.prototype.addToBucket = function addToBucket(item) {
  this.items.push(item);
};

BucketCollector.prototype.items = [];

var a = new BucketCollector();
var b = new BucketCollector()
a.addToBucket('thing');
b.addToBucket('otherThing');

console.log('a.items:', a.items);
console.log('b.items:', b.items);