[hnedeotes]

What exactly are you thinking in terms of latency becoming an issue under LiveView but not on normal requests?

Do you mean when websites just need a full refresh because they lost their requests on some callback and no-one implemented recovery across the 5 levels of callbacks or something more specific?

[arjan_sch]

Well with Liveview you go "full server state" for everything that you would normally just use plain JS for. For instance, toggling a checkbox or collapsing a div.

Having latency on such lowlevel interactions might make the UI feel sluggish as a whole.

[hnedeotes]

Yeah certainly, but I'm not sure people are using it that way?

Most examples are to show cool stuff you can do, they're not production vetted. Like most JS examples out there don't really mean that people should be publishing live credentials with their bundles.

I imagine in most cases one would leave everything that is not behind a logged in status as normal routes/pages (signin, landing, contacts, etc). Or if not that those would be things requiring a socket/real-time interface anyway.

For the interactions, I don't think you even need to use alpine.js. Plain setup on DOMContentLoad, CSS Dropdowns/collapsibles that are replaced on JS load, proxying LiveView DOM/Morphdom events (if needed) so other components (even vue,react, etc) can listen to them, and CSS animations.

  import { setup_live } from "./phx/setup_live.js";
  import { setup_dropdowns } from "./interactivity/dropdowns.js";
  import { setup_collapsibles } from "./interactivity/collapsibles.js";
  import { setup_links } from "./interactivity/links.js";
  import { setup_inputs } from "./interactivity/inputs.js";

  function setup() {
      setup_live();
      setup_links();
      setup_dropdowns();
      setup_collapsibles();
      setup_inputs();
  }

  document.addEventListener("DOMContentLoaded", setup);

I went as far as having `onclick` handles and global window functions. Complete heresy. Yes, it's not 100% JS free, but it's pretty much low overhead.

Then LiveView is mostly for your admin dashboards and logged in users views, where it makes it pretty easy to do real-time feedback type of interactions/views and spa like navigation. Since you have proper auth and identification on the user, you can just log them off, rate-limit, block an account, and close their socket if needed.

[iudqnolq]

Have you figured out any good way to have per-page javascript where the JavaScript is only sent over the wire for that pages?

[hnedeotes]

From the top of my head not really, but this would depend on a few things:

- Is it a vendor lib ?

- It's not but is some particular file that is big enough to not make sense including on the root layout?

- It's neither, but functionality that can trigger multiple times and should be only once and only on those pages because it can conflict? or some variation of that?

I think they're all solvable but what makes sense will depend on those, but also on how you're using LiveView (is it LiveView only for logged-in users/some auth, can you set those on the live_view layout...)

But in some cases this is a problem also in spa's, where you have to use a snippet to check if the lib has been loaded, if not add a script tag to the body, or load it through js, etc...

[di4na]

You don't have to. You can totally use JS for these in Liveview

[keymone]

https://news.ycombinator.com/item?id=26992315