The void operator returns an undefined value from an evaluated expression, or in other words; the void operator specifies an expression to be evaluated without returning a value. It is commonly used in client-side JavaScript, where the browser should not display the value.

function getYear() {
  return 2020;

// Output: 2020

console.log(void getYear());
// Output: undefined

// Useful use case
button.onclick = () => void getYear();