Default value for function parameter?

Question

So I\'ve been doing this for as long as I can remember, but I\'m curious if this is really what I should be doing. You write a function that takes a parameter, so you antic

Answer 1

In JavaScript, the argument will be undefined if the user didn't pass it in. You can use the || operator to set the value of the argument if it's undefined:

function foo(bar) {
  bar = bar || 0;
  ...
}