Static variables in JavaScript

Question

How can I create static variables in Javascript?

Answer 1

In JavaScript, there is no term or keyword static, but we can put such data directly into function object (like in any other object).

function f() {
    f.count = ++f.count || 1 // f.count is undefined at first
    alert("Call No " + f.count)
}

f(); // Call No 1

f(); // Call No 2