use static Object API

[jonlepage]

This formulation would make more sense if it were included as a static member of the Object: Object.composite({...}) object.
JavaScript already has a large number of reserved keywords, which significantly pollutes the global namespace.

[ljharb]

This proposal doesn't include a keyword - do you mean a global?

[jonlepage]

What I mean is that, in an ECS architecture, we use the terms Component and Composite.
This could lead to confusion when IDEs will start suggesting Composite in the global scope

[ljharb]

I have no idea what an "ECS architecture" is.

However, any arbitrary application could be using any combination of characters, and that might conflict with a new global being added. I'm not sure why that's something to consider, separate from web compatibility?

[jonlepage]

I have no idea what an "ECS architecture" is.

it a design pattern "un paradigme de conception"
https://scholar.afit.edu/cgi/viewcontent.cgi?article=6355&context=etd

If you say so, I probably misunderstood the suggestion. My apologies.