Question

There exist some concept like variables variable to print variable names or call functions dynamically:

http://php.net/manual/en/language.variables.variable.php

Thanks in advance.

Answer 1

The closest JavaScript equivalent is bracket notation, for example:

var obj = { myMethod: function() { alert("Hello!"); } };
var func = "myMethod";
obj[func](); //equal to obj.myMethod();

You can test it out here, in JavaScript calling these two is equivalent:

object.property
object["property"];

And the latter allows you to use a variable, to get any property or method you want.

To be clear this is a JavaScript behavior, there’s nothing specific to jQuery about it.