JavaScript: Remove duplicates from an array of objects based on key

var users = [ { name: 'Rahul', email: 'test1@test.com' }, { name: 'Rajeev', email: 'test2@test.com' }, { name: 'Revanth', email: 'test2@test.com' } ]; let emailIds = users.map( (item) => { return item.email; }) let...