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understand js code

I am trying to understand this javascript code.. I have a .js file and code is below...

In this section of the code,
return declare([BaseWidget], {
why is BaseWidget written within square bracket?

Whole Code :

define(['dojo/_base/declare', 'jimu/BaseWidget'],
function(declare, BaseWidget) {
  //To create a widget, you need to derive from BaseWidget.
  return declare([BaseWidget], {
    // DemoWidget code goes here 

    //please note that this property is be set by the framework when widget is loaded.
    //templateString: template,

    baseClass: 'jimu-widget-demo',

    name: 'Demo',

    postCreate: function() {
      this.inherited(arguments);
      console.log('postCreate');
    },
 onSignOut: function(){
      console.log('onSignOut');
    }
  });
});

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pl help

thanks

Michel Plungjan

I assume declare takes an array of objects.
that is how to coerce BaseWidget into the array

ASKER CERTIFIED SOLUTION

Julian Hansen

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Michel Plungjan

Leaving the square brackets out would fail if the function expects an array and loops over them

Julian Hansen

Leaving the square brackets out would fail if the function expects an array and loops over them

If you refer to the documentation in my previous post it says.

superclass 	null|Object|Object[] 	

This parameter is either

    null (no base class),
    an object (a base class) or
    an array of objects (multiple inheritance).

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Which implies if it is a single object it does not require brackets - but if brackets are included it will still process it as an array is also an option.

Michel Plungjan

Ah, ok, then it is cleverer than I thought

ts84zs

ASKER

thanks so much i am looking into it...