Another esm fallback through AMD/requirejs

[morlay]

DEMO: https://morlay.github.io/vite-presets/
SRC: https://github.com/morlay/vite-presets/tree/main/src (unpublished, just for showcase)

ESM is not fully supported, espcially in web worker (I couldn't make my simple app works with @vitejs/plugin-legacy and SystemJS).

If we want to use vite for now to make our web application to support more browsers, we have to bundle files without ESM.