How is Kaboom.js an ECS?

[ghost]

I am curious on how Kaboom.js an Entity Component System (ECS)? When seeing the examples, I can see that the library has two parts of an ECS. These parts are the entity (created via add()), and the component (ex. body(), health(), sprite(), etc.). The only part I cannot see based on the API is the system. How does the library know what to render and how to render it? How does the library know what entities need to be checked for collision detection? Are new actions/abilities added with new components rather than with new systems?

[slmjkdbtl]

Kaboom takes ideas from ECS but isn't an ECS. The logic and data is still coupled in components and there's no concept of a system, prioritizing ease of use.

Kaboom has lower level drawing APIs like drawSprite(), drawRect() etc similar to the p5.js / love2d / canvas2d drawing functions, components like sprite() will call these in the draw() event to do the rendering. You can also use drawSprite() etc yourself in onDraw() if you want to do something custom.