Multiple values are assigned to one variable. How does this work?

Question

Angularjs specific code:

var deferred = $q.defer(),
    nextTransClass, prevTransClass;

What's the meaning of this? I have never seen such variable assignment.

score 5 · Accepted Answer · answered Aug 04 '13 at 15:54

5

They're not all assigned to the same variable; they're just being declared on the same line.

The code above is equivalent o the following:

var deferred = $q.defer();
var nextTransClass;
var prevTransClass;

P.S. There's nothing Angular specific about this (besides for $q.defer(), obviously). This is just standard vanilla JavaScript.

answered Aug 04 '13 at 15:54

Joseph Silber

+1 thank your for clarification – UpCat Aug 04 '13 at 15:56
@Joseph: in this case, what would be the type of "var"? would it have different types? (i think i'm missing something because i come from a strongly-typed background. :) ) – OJ Raqueño Aug 04 '13 at 15:59
2

@OJRaqueño - `var` does not indicate the type; it's just a generic form of variable declaration. – Joseph Silber Aug 04 '13 at 16:01

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