Variables declared with ":" instead of "="

Question

Can someone explain the difference in Javascript between:

var x = something

and

var x : something

I have no idea on where/how to search about it.

I saw the code above at the bottom of page 4 of this document: http://download.unity3d.com/support/Tutorials/2%20-%20Scripting%20Tutorial.pdf

Thanks in advance!

Answer 1

The first one assigns something to a variable x and the other causes a syntax error.

You're probably mixing up assigning a property in an object literal and normal assignment.

var x = something;//assigning a variable
var y = {
    x:something//assigning a object property
};

Edit

var target : Transform;

seems to be UnityScript not JavaScript, it looks like it is not assigning a value but rather setting the variable type. see here

Answer 2

UnityScript is not JavaScript

Unity Script vs Javascript