Javascript notation

Question

I came upon a notation I'm not too familiar with and would like some direction to where to look.

the notation is "selector event" : function() {}

so for example

".elementClass change" : function() {}

Answer 1

This notation is for a key-value pair within an object . The specific example is for a function value belonging to a selector and event key. The function is then accessible using the key:

var obj = {
    ".elementClass change": function () {}
};
var func = obj[".elementClass change"];