correct way to define default params in es5

[redacted-dev]

I think this way is better:

'use strict';

function greet(msg, name) {
    msg = msg || "hello";
    name = name || "world";
    console.log(msg, name);
}

greet();
// -> hello world
greet('hey');
// -> hey world

[hville]

Only in the very narrow use case where arguments are always truthy. Fails with valid falsy arguments:

• greet('',0) // -> "hello world" instead of "0"