Should all the parameters with default values must be grouped together and put at the end of the parameters list?

[tjwudi]

Should all the parameters with default values must be grouped together and put at the end of the parameters list? What if I have a function definition like this

function foo(a, b = "", c) {}

[nzakas]

Are suggesting something for the book or is this just a general question?

[rwaldron]

This is allowed:

function foo(a, b = "", c) {}

This is not allowed:

function foo(a, ...b, c) {}

The original message body had an error pasted in—what was that produced by?

[getify]

@rwaldron:

just to clarify something... if you have:

function foo(a, b = "", c) { console.log(a,b,c); }

Then you cannot set c and also invoke the default value for b right?

foo(1, void 0, 3); // 1,undefined,3    not     1,"",3

Correct?

[rwaldron]

@getify explicit undefined will invoke the default value

foo(1, void 0, 3); // 1,"",3

[getify]

TIL. thanks @rwaldron.