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Im having trouble with the different ways for declaring js-objects, especially after reading the knockout.js documentation. They seem to mix all possible ways. What is the big difference between these four ways of declaring an object?

var object = new Object();
name.field = bla;
name.method = function() { bla };

var object = {
field : "bla",
method : function() { bla };
}

--> I guess these are equivalent, just different notations. But in the second case, how would you pass parameters? Or isnt it possible at all?

And in the two bwlo: Whats the difference between storing it in a variable and not storing it in a variable (other than the way the object would be passed to a function)?

function object() {
this.field = "bla";
this.method = function() { bla };
}

otherfunction(new Object());

var myobject = function name() {
this.field = "bla";
this.method = function() { bla };
}

otherfunction(new myobject());
otherfunction(myobjet);

EDIT: Sorry for asking again, didn't see the other one in the suggested topics.

user2791739
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1 Answers1

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In the first one you are using new statement:

The new operator creates an instance of a user-defined object type or of one of the built-in object types that has a constructor function.

So you can make an object of any function you define

var x = function() {};
new x();

The second thing is an object literal:

An object literal is a list of zero or more pairs of property names and associated values of an object, enclosed in curly braces ({}).

It's always an instance of an Object function. Why would you like to to pass parameters here? You are defining explicit object, there is no need to pass parameters here.

Marcin Olichwirowicz
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