const a = { b: 1, c: 2 };<br /> const d = { e: 1, f: 2 };</p> <p>const ad = { …a, …d }; // { b: 1, c: 2, e: 1, f: 2 }

const first = {<br /> name: ‘Marcus’,<br /> sub: { eyes: ‘blue’ }<br /> }</p> <p>const second = {<br /> name: ‘Node.js’,<br /> sub: { hair: ‘brown’ }<br /> }</p> <p>const merged = Object.assign({}, first, second)<br /> // { name: ‘Node.js’,<br /> // sub: { hair: ‘brown’ }<br /> // }

const object1 = {<br /> name: ‘Flavio’<br /> }</p> <p>const object2 = {<br /> age: 35<br /> }<br /> const object3 = {…object1, …object2 } //{name: “Flavio”, age: 35}<br />

var person={“name”:”Billy”,”age”:34};<br /> var clothing={“shoes”:”nike”,”shirt”:”long sleeve”};</p> <p>var personWithClothes= Object.assign(person, clothing);//merge the two object<br />

/* For the case in question, you would do: */<br /> Object.assign(obj1, obj2);</p> <p>/** There’s no limit to the number of objects you can merge.<br /> * All objects get merged into the first object.<br /> * Only the object in the first argument is mutated and returned.<br /> * Later properties overwrite earlier properties with the same name. */<br /> const allRules = Object.assign({}, obj1, obj2, obj3, etc);

let obj1 = { foo: ‘bar’, x: 42 };<br /> let obj2 = { foo: ‘baz’, y: 13 };</p> <p>let clonedObj = { …obj1 };<br /> // Object { foo: “bar”, x: 42 }</p> <p>let mergedObj = { …obj1, …obj2 };<br /> // Object { foo: “baz”, x: 42, y: 13 }</p> <p>

Object.assign(target, sourceObj1, sourceObj2, …);

const obj1 = {‘a’: 1, ‘b’: 2};<br /> const obj2 = {‘c’: 3};<br /> const obj3 = {‘d’: 4};</p> <p>const objCombined = {…obj1, …obj2, …obj3};

const response = {<br /> lat: -51.3303,<br /> lng: 0.39440<br /> }</p> <p>const item = {<br /> id: ‘qwenhee-9763ae-lenfya’,<br /> address: ’14-22 Elder St, London, E1 6BT, UK’<br /> }</p> <p>const newItem = { …item, location: response }; // or { …response } if you want to clone response as well</p> <p>console.log(newItem );

/**<br /> * Simple object check.<br /> * @param item<br /> * @returns {boolean}<br /> */<br /> export function isObject(item) {<br /> return (item && typeof item === ‘object’ && !Array.isArray(item));<br /> }</p> <p>/**<br /> * Deep merge two objects.<br /> * @param target<br /> * @param …sources<br /> */<br /> export function mergeDeep(target, …sources) {<br /> if (!sources.length) return target;<br /> const source = sources.shift();</p> <p> if (isObject(target) && isObject(source)) {<br /> for (const key in source) {<br /> if (isObject(source[key])) {<br /> if (!target[key]) Object.assign(target, { [key]: {} });<br /> mergeDeep(target[key], source[key]);<br /> } else {<br /> Object.assign(target, { [key]: source[key] });<br /> }<br /> }<br /> }</p> <p> return mergeDeep(target, …sources);<br /> }<br />