add key value pair in array javascript code example
Example 1: how to add field to object in js
var obj = {
key1: "a",
key2: "b"
};
obj.key3 = "c";
obj["key3"] = "c";
console.log(obj)
Example 2: javascript add to object
var element = {}, cart = [];
element.id = id;
element.quantity = quantity;
cart.push(element);
var element = {}, cart = [];
element.id = id;
element.quantity = quantity;
cart.push({element: element});
Example 3: add key value pair to all objects in array
var arrOfObj = [{
name: 'eve'
}, {
name: 'john'
}, {
name: 'jane'
}];
var result = arrOfObj.map(function(el) {
var o = Object.assign({}, el);
o.isActive = true;
return o;
})
console.log(arrOfObj);
console.log(result);
Example 4: add new key value pair to object javascript
const person = {
name: "Elon Musk"
}
person.age = 49;
console.log(person);