How to Find the Last ID in JavaScript?

The concept of the “last ID” is not inherently defined in JavaScript. The meaning of the last ID depends on the context in which it is used.

For example, if you are working with a database, the last ID could be the highest numerical ID assigned to a record in the database. In this case, you would need to query the database to get the last ID.

If you are working with a collection of objects in JavaScript, you could assign each object a unique ID, and keep track of the highest ID value you have used so far. For example:

var objects = [];
var lastId = 0;

function addObject(object) {
  object.id = ++lastId;
  objects.push(object);
}

In this example, lastId is a variable that keeps track of the highest ID value used so far. When a new object is added to the objects array with the addObject function, its id property is set to the current value of lastId, and then lastId is incremented. This ensures that each object has a unique id property.