Typescript 5.0 support

[patroza]

Typescript 5.0 beta was released https://devblogs.microsoft.com/typescript/announcing-typescript-5-0-beta/
But typing inside template attributes doesn't work with it:

components/TextArea.vue:5:26 - error TS7006: Parameter 'value' implicitly has an 'any' type.

@update:model-value="value => convertOut(value, updateValue)"

components/Some.vue:62:28 - error TS7006: Parameter '_' implicitly has an 'any' type.

v-if="items.some(_ => _.state._tag === 'Open')"

tested in latest vue-tsc.

[johnsoncodehk]

I can't reproduce the problem, please provide minimal reproduction, and make sure you have update vue-tsc to latest.

[patroza]

@johnsoncodehk the error seems to come especially with vue-tsc -w, and not with just vue-tsc

5.0.0-beta

[patroza]

@johnsoncodehk here's a repro
https://github.com/patroza/vue-tsc-repro

npm i
npm run vue-tsc -- -w

Observed

components/some-component.vue:3:11 - error TS7006: Parameter '_' implicitly has an 'any' type.

3     .then(_ => 'test')" />
            ~

Expected

No error. Like in the editor, it seems fine (even with Volar TS version set to node_modules/typescript).

[patroza]

@johnsoncodehk do you have some pointers, maybe I could help

[patroza]

@johnsoncodehk in the meantime 5.0 final was released

[segevfiner]

Enabling "verbatimModuleSyntax": true also causes the following error in a plain create-vue@3 project with TS upgraded to TS 5.0.2:

❯ pnpm type-check

> [email protected] type-check /Users/segevfiner/junk/vue-ts5
> vue-tsc --noEmit -p tsconfig.vitest.json --composite false

/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected][email protected]/node_modules/vue-tsc/bin/vue-tsc.js:43
                        throw err;
                        ^

Error: Debug Failure. False expression.
    at isReferencedAliasDeclaration (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:82757:13)
    at canConvertImportDeclarationToTypeOnly (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:81296:177)
    at checkImportsForTypeOnlyConversion (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:81311:13)
    at checkSourceFileWorker (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:81874:11)
    at checkSourceFile (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:81822:7)
    at checkSourceFileWithEagerDiagnostics (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:81916:7)
    at getDiagnosticsWorker (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:81924:9)
    at Object.getDiagnostics2 [as getDiagnostics] (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:81901:16)
    at /Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:116837:78
    at runWithCancellationToken (/Users/segevfiner/junk/vue-ts5/node_modules/.pnpm/[email protected]/node_modules/typescript/lib/typescript.js:116807:16)
 ELIFECYCLE  Command failed with exit code 1.

[segevfiner]

It also seems that vue-tsc --build will randomly fail resolving .vue imports unless ran multiple times.

[blake-newman]

#2555

This should resolve this issue