Extjs merge objects

Question

I have a super class in my application, that defines an object like this:

Ext.define(\'superclass\', {
    myObject: {
        prop1: true,
        prop2: 200,
          


        

Answer 1

Both of the provided answers will change the superclass prototype's myObject property as soon as a child class is constructed. This may not be what you want. I question why you are putting an object on the class prototype like this. It's generally not a good idea to do it. But if you really want to, you can do this

Ext.define('childclass', {
    extend: 'superclass',

    // I'm adding an empty object here so that myObject on the
    // prototype does not get overridden.
    myObject: Ext.merge({}, superclass.prototype.myObject, {
        prop3: false,
        prop4: false
    });

});