javascript join two objects code example

Example 1: merge two objects javascript

const object1 = {
  name: 'Flavio'
}

const object2 = {
  age: 35
}
const object3 = {...object1, ...object2 } //{name: "Flavio", age: 35}

Example 2: merge objects javascript

const a = { b: 1, c: 2 };
const d = { e: 1, f: 2 };

const ad = { ...a, ...d }; // { b: 1, c: 2, e: 1, f: 2 }

Example 3: merge objects js

/* For the case in question, you would do: */
Object.assign(obj1, obj2);

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

Example 4: react merge two objects

const object1 = {
  name: 'Flavio'
}

const object2 = {
  age: 35
}

const object3 = {...object1, ...object2 }

Example 5: two object combine together javascript

const a = { b: 1, c: 2 };
const d = { e: 1, f: 2 };

const ad = { ...a, ...d }; // { b: 1, c: 2, e: 1, f: 2 }


let objs = [{firstName: "Steven"}, {lastName: "Hancock"}, {score: 85}];

let obj = objs.reduce(function(acc, val) {
    return Object.assign(acc, val);
},{});