Support Vue 3

[jods4]

Feature description

Vue 3 is now publicly available in alpha.
Because of changes in its internal structure, tools like fork-ts-checker-webpack-plugin need to be updated (see below).

Feature implementation

I'm using Vue 3 + Webpack + Typescript in my project.
This requires ts-loader@6.2.1, vue-loader@16.0.0-alpha.3 and @vue/compiler-sfc@3.0.0-alpha.4.

When I try to use vue: true in fork-ts-checker-webpack-plugin I get the following error:

INTERNAL ERROR: When you use `vue` option, make sure to install `vue-template-compiler`.

I'm pretty sure this is because Vue 3 uses @vue/compiler-sfc to compile views instead of vue-template-compiler and the checker needs to be updated to use this package when it's available instead of the old one.

[johnnyreilly]

If you'd like to work on this that would be greatly appreciated. I'm not a Vue user and I believe none of the other maintainers are either.

If someone would like to submit a PR that would be greatly appreciated. It's important that we maintain support for Vue 2 for now as well. Thanks!

[piotr-oles]

Did you try the following settings?

vue: {
  enabled: true,
  compiler: '@vue/compiler-sfc'
}

[jods4]

@piotr-oles I did not, I'll try tomorrow!
Should it work? If the packages share the same interfaces it might (and it would also be rather easy to fix out-of-the-box)

[jods4]

Quick update: it doesn't work.

Unfortunately the exported api has changed just a little bit.

I have not tested yet but changing this line:
https://github.com/TypeStrong/fork-ts-checker-webpack-plugin/blob/master/src/VueProgram.ts#L321

to

 const { descriptor: { script } } = parser.parse(content, {
      pad: 'space'
    });

might work.

[jods4]

PR available in #389

[piotr-oles]

🎉 This issue has been resolved in version 5.0.0-alpha.8 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[jods4]

Tested with 5.0.0-alpha.9 it works great!
(after fiddling with the 5.0 config changes)

Note to anyone else finding this with Google:
The correct compiler (Vue 2 vs 3) is not automatically detected, be sure to explicitly configure it in fork-ts-checker options:

vue: {
  enabled: true,
  compiler: '@vue/compiler-sfc'
}

[piotr-oles]

🎉 This issue has been resolved in version 5.0.0-beta.1 🎉

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot 📦🚀