js push in object
let obj = {};
let objToAdd1 = { prop1: "1", prop2: "2" };
let objToAdd2 = { prop3: "3", prop4: "4" };
// obj variabile could be empty or not, it's the same
obj = { ...obj, ...objToAdd1 };
obj = { ...obj, ...objToAdd2 };
// Note that i used the spread operator... This syntax is available
// only for the most recent js ES (from ES6 on, if i'm not wrong) :)
console.log(obj);