To add key value pair to all objects in array with JavaScript, we use the spread operator.
For instance, we write
const arr = [{ name: "eve" }, { name: "john" }, { name: "jane" }];
const newArr = arr.map((v) => ({ ...v, isActive: true }));
to call arr.map with a callback that returns an object with the properties in v spread into a new object.
And then we add the isActive property to the object.
