Fix script loading issue in Firefox fixes #601

[jchatard]

In Firefox the onload attribute is not always triggered on script element so we instead use script.addEventListener('load')

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[atk]

This loses us the ability to use [handler, argument] event props. We also seem to have some issues with the calling of spread() that need to be addressed. I would probably go and replace it. In the meantime, can you try on:load as a workaround?

[jchatard]

I'm not sure I fully understand what you suggest with on:load.

My understanding is that on: is for JSX markup.

But neither in this PR or in my user land code, do I have JSX involved.

My user land code:

  createScriptLoader({
    src: "/assets/glide.min.js",
    async: true,
    onLoad() {
      setHasGlideLoaded!(true);
    },
  });

What do you suggest exactly?

[atk]

Use 'on:load': () => ....

[atk]

I just checked and 'on:load' seems to work flawlessly, so we can pull off the following trick:

const OMITTED_PROPS = ["src", "onLoad", "onload"] as const;
//...
  const script = document.createElement("script");
  const [local, scriptProps] = splitProps(props, OMITTED_PROPS);
  const onload = local.onload || local.onLoad ? { 'on:load': local.onload || local.onLoad } : {};
  setTimeout(() => spread(script, mergeProps(scriptProps, onload), false, true));

[atk]

But I'm afraid onError might have the same issue?

[jchatard]

I hope to have time to test this today.

[jchatard]

Hi @atk sorry for the delay, couldn't find a time slot to check this before.

I just tried what you suggested, but this doesn't seem to solve the issue.

In the repro I created, I changed the scriptLoader to:

createScriptLoader({
  src: "https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js",
  'on:load': () => {
    console.log("jQuery loaded");
    setJqueryLoaded(true);
  },
});

But when running tests, it fails the same way as before.

[atk]

I just checked, on:load is transpiled by JSX expressions, so that does not help, we need to set the events ourselves. Let's use the actual events, but for all events. I'll create a PR.

[atk]

Closed; being fixed in #637