Troubleshooting: "Vue 3 Integration with Typescript - Declaration File Not Found"

Question

Troubleshooting: "Vue 3 Integration with Typescript - Declaration File Not Found"

I recently set up a brand new Vue 3 application with TypeScript. This project was generated today using the latest version of Vue with npm create 'project name' (Vue 3) (Vue/CLI 5.0.8).

Every time I try to import components into the router or even into app.vue, I encounter an error on all imports stating 'could not find a declaration file for module'. It seems like there might be a simple oversight on my end causing this issue.

The project does compile and launch successfully despite this error.

https://i.sstatic.net/2VA7N.png

The components are currently just placeholders and no actual code has been implemented in them yet.

Here is an example of one of the components:

<template>
  <div>
    <!-- -->
    <h1>Inventory</h1>
  </div>
</template>

<script setup>

</script>

typescript vue.js vuejs3

Answer 1

Answer №1

After some troubleshooting, I found that the solution was to restart the IDE. Upon restarting, half of the highlighted errors in VS Code disappeared while the other half remained visible, allowing me to pinpoint the issue by comparing what was causing errors and what wasn't.

In the end, it turned out to be a simple and minor problem.

The root cause was that the 'lang="ts"' attribute was missing on the script tag in all components. Adding 'lang="ts"' to the script tag resolved all errors instantly.

<template>
  <div>
    <!-- -->
    <h1>Customers</h1>
  </div>
</template>

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

Answer 2

After some troubleshooting, I found that the solution was to restart the IDE. Upon restarting, half of the highlighted errors in VS Code disappeared while the other half remained visible, allowing me to pinpoint the issue by comparing what was causing errors and what wasn't.

In the end, it turned out to be a simple and minor problem.

The root cause was that the 'lang="ts"' attribute was missing on the script tag in all components. Adding 'lang="ts"' to the script tag resolved all errors instantly.

<template>
  <div>
    <!-- -->
    <h1>Customers</h1>
  </div>
</template>

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

Answer 3

Answer №2

After copying a router.ts file and other .Vue files, I encountered identical problems. Fortunately, adding the necessary code to the script section, restarting VSC, helped eliminate the warnings.

I found a helpful solution on Github (https://github.com/vitejs/vite/discussions/14159) where they suggested including "allowJs": true. This alternative also proved effective in resolving the issue.

Answer 4

After copying a router.ts file and other .Vue files, I encountered identical problems. Fortunately, adding the necessary code to the script section, restarting VSC, helped eliminate the warnings.

I found a helpful solution on Github (https://github.com/vitejs/vite/discussions/14159) where they suggested including "allowJs": true. This alternative also proved effective in resolving the issue.

Troubleshooting: "Vue 3 Integration with Typescript - Declaration File Not Found"

Answer №1

Answer №2

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