Composite Pattern in a nutshell
JavaScript edition
A composite pattern deals with the complexity of how objects are related to one another. According to the original definition,
[a composite pattern] allows you to compose objects into tree structures to represent part-whole hierarchies
But what does this mean? Let’s take a look at our cart object again. If we break it down, the entire cart can be composed of many ‘sub-items’ that can also exist as stand-alone items. The cart process involves multiple parts that may or may not be needed, depending on context and situational requirements.
In a composite pattern, an object can have a leaf and/or a composite. A leaf is the object’s implementations while a composite is the child object.
So if you look at it in the form of a tree diagram, a composite pattern looks something like this:
The composite structural pattern keeps the relationships and hierarchies of the objects (composites) together. However, you can take a branch and create…
