add new key value pair to object javascript
// original object { key1: "a", key2: "b"}
var obj = {
key1: "a",
key2: "b"
};
// adding new filed - you can use 2 ways
obj.key3 = "c"; // static
// or
obj["key3"] = "c"; // dynamic - 'key3' can be a variable
console.log(obj) // {key1: "a", key2: "b", key3: "c" }var element = {}, cart = [];
element.id = id;
element.quantity = quantity;
cart.push(element);
// Array of Objects in form {element: {id: 10, quantity: 10} }
var element = {}, cart = [];
element.id = id;
element.quantity = quantity;
cart.push({element: element});const person = {
name: "Elon Musk"
}
person.age = 49;
console.log(person);
// {name: "Elon Musk", age: 49}
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