What could be the reason behind my Vue file triggering a TS6504 error and suggesting to "allowJs"?

My Vue 3 project, which incorporates TypeScript, is encountering an issue when I attempt to execute vue-tsc --noEmit.

error TS6504: File '/proj/src/pages/Index.vue.__VLS_template.jsx' is a JavaScript file. Did you mean to enable the 'allowJs' option?
  The file is in the program because:
    Root file specified for compilation

error TS6504: File '/proj/src/pages/Index.vue.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
  The file is in the program because:
    Root file specified for compilation

error TS6504: File '/proj/src/pages/PassLayout.vue.__VLS_template.jsx' is a JavaScript file. Did you mean to enable the 'allowJs' option?
  The file is in the program because:
    Root file specified for compilation

error TS6504: File '/proj/src/pages/PassLayout.vue.js' is a JavaScript file. Did you mean to enable the 'allowJs' option?
  The file is in the program because:
    Root file specified for compilation

The files causing this issue, namely Index.vue and PassLayout.vue, do not contain <script> sections; they only consist of <template>.

PassLayout.vue

<template>
  <router-view />
</template>

What could be the reason behind these errors?

typescriptvue.js

Answer №1

When you do not specifically specify a <script> block with the lang="ts" attribute, vue-tsc will assume that the file is written in JavaScript rather than TypeScript.

You can either include "allowJs": true in the compilerOptions within your tsconfig.json.

Alternatively, you can add the following to any single-file components that do not have an explicit script block:

<script setup lang="ts"></script>

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