javascript-inheritance | JavaScript helper functions for Classical | Transpiler library

If you need inherit from few classes you can extend prototype Bird from Animal and Ufo using jquery function $.extend({});. Example $.extend(Bird.prototype,Animal.prototype,UFO.prototype) or you can create custom extend function.If names properties or functions has same names , they will be rewrite.

I got this from documentation: Using Object.assign() extend only enumerable properties.The Object.assign() method only copies enumerable and own properties from a source object to a target object. It uses [[Get]] on the source and [[Set]] on the target, so it will invoke getters and setters. Therefore it assigns properties versus just copying or defining new properties. This may make it unsuitable for merging new properties into a prototype if the merge sources contain getters. For copying property definitions, including their enumerability, into prototypes Object.getOwnPropertyDescriptor() and Object.defineProperty() should be used instead.

As you mentioned that you are open for modifying the Class.extend implementation from John, you could theoretically inject the _this variable as a function parameter.

This of course heavily depends on how much changes you wish to make on your current running code.

In my example, I added the _this parameter to the function argument list, as the first parameter for all functions. This would change your example class in the following way (the full example can be found in the snippet below):