Magento 2 mixins (extend/override for object literals)

m2-mixin-object-literal.js

/*
 * Magento 2 mixins for js files that return an object literal
 * (based on https://alanstorm.com/the-curious-case-of-magento-2-mixins/)
 * (for files that return an UIComponent: https://gist.github.com/alecarg/ed0516132e9c8a31c66f13fbccd292cf) 
 * (for files that return a function: )
 */

define([
    'mage/utils/wrapper'
], function (wrapper) {
    'use strict';

    return function(targetModule){
        
        /*
         *  Extend
         */
        targetModule.someMethod = wrapper.wrap(targetModule.someMethod, function(originalFn){            
            // do something before
            var result = originalFn(); // call original method (if needed)
            // do something after
            return result; // return original value
        });
        
        /*
         *  Override
         */
        targetModule.someOtherMethod = wrapper.wrap(targetModule.someFn, function(){            
            /* copy code from someOtherFn here if needed or write your own; also attempt to
            return in line with what the original fn returned to avoid breaking anything */
        });
        
        return targetModule;
    };
});