Broken hot reload when using workaround for #44

[zastrowm]

🐛 Workaround Report for #44

Like issue #44, I got the Class constructor SvelteComponent cannot be invoked without 'new' error; applying the workaround mentioned for a modern browser via browserslist:

"browserslist": [
    "edge >= 13"
  ]

gets things working in parcel, but as comment on #44 mentions, it completely breaks HMR.

Looking at svelte-asset.js I found that if you stop calling makeHot, then the browser refreshes as normal.

i.e. remove these lines:

parcel-plugin-svelte/packages/parcel-plugin-svelte/src/svelte-asset.js

Lines 86 to 88 in e0ee9a3

	if (process.env.NODE_ENV !== 'production' && this.options.hmr) {
	code = makeHot(compilerOptions.filename, code, this);
	}

And then modifying a svelte file does refresh the browser.

🌍 Your Environment

• Windows OS
• parcel-bundler: 1.12.3
• svelte: 3.4.2

[samuelgozi]

A temporary solution would be to turn off HMR entirely by adding the --no-hmr flag to the parcel command.
I will add a pull request for a fix later today.