JS Set Methods
Use add, has, and delete to manage membership. Size reports how many distinct entries remain.
Where to run this
This example uses the JavaScript console playground. Select Run to execute it; the example does not run on this lesson page.
A practical example
const attendees = new Set();
attendees.add("Mira");
attendees.add("Jon");
attendees.delete("Jon");
console.log(attendees.has("Mira"), attendees.size);
What happens
Mira is present and the size is 1.