[dannye]

One drawback.

► execute <script> at bottom of file

► execute <script defer>

Both do the same; they execute script after DOM was parsed. When your JS creates GUI you now have to battle FOUCs.

► "import" loads your script async

so it _could_ load before _all_ DOM has parsed... but 9999 out of 10000 scenarios it won't

[yawaramin]

That's why my JS doesn't create the GUI, it just attaches event handlers to the GUI rendered on the server. Check the link I posted above...