How to use get (getter) keyword in dojo - dojo

Question

I am looking for a functionality like below in dojo class (AMD).
function () {
var _foo = 123; // private variable
return {
get foo () { return _foo; }
};
}());
The advantage is once the value _foo is initialised user can't modify the value _foo or foo from the console. How do we achieve this in dojo class like
define["dojo/_base/declare", "dojo/request", "dojo/_base/lang"],
function(declare, request, lang) {
var _foo = 123;
return declare("fooClass", null, {
get foo () { return _foo; }
});
});
when i declare as above when we try to build the class using dojo build.sh it is giving parsing errors.how to make a value not changeable from debug console in dojo

Answer 1

There is not really an advantage with your solution, as if an user open the debugger console, a developer could set a breakpoints at var _foo =123; and change its value at run time any time.
In your code actually you are showing an example of a closure.
A closure allow your var _foo to be hidden inside your function() so a developer would not be able to get that value within its js code.
Nevertheless you can still access it using the debugger console adding a simple breakpoint.
If you are interesting to use getter and setter for dojo, please read on.
The dojo naming convention to specify a custom getter or setter (in this example for an attribute named foo) is:
_setFooAttr() and _getFooAttr()
Example:
require([
"dojo/_base/declare", "dojo/dom-style", "dojo/parser", "dojo/ready",
"dijit/_WidgetBase", "dijit/_TemplatedMixin"
], function(declare, domStyle, parser, ready, _WidgetBase, _TemplatedMixin){
declare("HidePane", [_WidgetBase], {
// parameters
open: true,
// custom setter
_setOpenAttr: function(/*Boolean*/ open){
this._set("open", open);
domStyle.set(this.domNode, "display", open ? "block" : "none");
}
});
ready(function(){
parser.parse();
});
});