On 11/11/2013 11:31 AM, Corey Frang wrote:
I hate to bring this up, as I'm sure I've missed a bunch of the
arguments that define WHY, but if this is the case, it seems
unintuitive to me that passing undefined still results in a default
param being set.
function test(a = 1) { console.log(a); }
test(); // gets 1 - yay
test(undefined); // gets 1 - boo! Expect: undefined
(sorry tab, forgot to reply all on the first reply :( )
The reason for this is so that you can do:
```js
function foo(bar) {
return delegatedFoo("foo", bar);
}
function delegatedFoo(foo, bar = "bar") {
return foo + bar;
}
foo(); // "foobar" and not "fooundefined"
```
This kind of argument-passing delegation is a very common in JS.
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