Recursive
Object.assign()
$ npm install --save deep-assign
var deepAssign = require('deep-assign');
deepAssign({a: {b: 0}}, {a: {b: 1, c: 2}}, {a: {c: 3}});
//=> {a: {b: 1, c: 3}}
Recursively assigns own enumerable properties of source objects to the target object and returns the target object. Additional source objects will overwrite previous ones.
MIT © Sindre Sorhus