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Vue Academy · Lesson

TypeScript Setup in Vue Projects

vite.config.ts, tsconfig.json, vue-tsc, lang='ts' in SFCs, IDE TypeScript support.

Lesson 1 of 413 steps

TypeScript Setup in Vue Projects is a free Vue Academy lesson on CoddyKit. This is lesson 1 of 4. Any 3 lessons of this learning path are free to read in full — after that, CoddyKit PRO unlocks every lesson, plus hands-on practice with a built-in code editor and a 24/7 AI tutor. It is part of the Vue Academy learning path, and your progress syncs across the web and the CoddyKit app. The Vue Academy course includes 4 lessons in total.

TypeScript in Vue 3

Vue 3 was rewritten in TypeScript, so it offers excellent type support. A well-configured project catches bugs at compile time and powers great editor autocomplete in .vue files.

Scaffolding With TS

The easiest start is create-vue, which asks whether to add TypeScript and wires up tsconfig.json, vue-tsc, and the right tooling.

npm create vue@latest
# select "Add TypeScript? Yes"

tsconfig.json Basics

The tsconfig.json controls compilation. The most important setting for catching bugs is strict mode.

{
  "compilerOptions": {
    "strict": true,
    "target": "ESNext",
    "module": "ESNext"
  }
}

Why strict Mode Matters

strict: true enables strictNullChecks, noImplicitAny, and more. It forces you to handle null/undefined and stops untyped values from slipping through.

Path Aliases

The @/ alias maps to your src folder so imports stay clean regardless of file depth. Configure it in both tsconfig.json and your bundler.

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@/*": ["./src/*"]
    }
  }
}

Using the Alias

Now imports reference modules from the project root, not relative ../../ chains.

import Button from '@/components/Button.vue'
import { useAuth } from '@/composables/useAuth'

TypeScript in SFCs

To use TypeScript inside a Single File Component, add lang="ts" to the script tag. With <script setup> this unlocks typed macros.

<script setup lang="ts">
const count: number = 0
</script>

Type Checking SFCs

The regular tsc compiler does not understand .vue files. Vue ships vue-tsc, a wrapper that type-checks templates and scripts together.

vue-tsc --noEmit

Adding a Check Script

Add a script to package.json so CI and you can verify types in one command.

{
  "scripts": {
    "type-check": "vue-tsc --noEmit"
  }
}

Editor Support With Volar

The Volar (Vue - Official) VS Code extension provides TypeScript intelligence inside .vue files: autocomplete, go-to-definition, and template type errors. Disable the old Vetur to avoid conflicts.

Takeoff Mode

Volar can run in Takeover Mode, replacing the built-in TS extension so it handles both .ts and .vue files. This improves performance and consistency in large projects.

Quick Check

Test your TypeScript setup knowledge.

Answer it in the interactive lesson

Recap

You set up TypeScript in Vue:

  • Enable strict mode in tsconfig.json for the strongest checks.
  • Configure the @/* path alias to src.
  • Add lang="ts" to SFC scripts.
  • Type-check with vue-tsc --noEmit and use the Volar extension in VS Code.
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Frequently Asked Questions

Is the “TypeScript Setup in Vue Projects” lesson free?

Yes — any 3 lessons of the Vue Academy learning path, including “TypeScript Setup in Vue Projects”, are free to read in full here on the web. After that, CoddyKit PRO unlocks every lesson, plus interactive practice with a built-in code editor and a 24/7 AI tutor. The Vue Academy course includes 4 lessons in total.

What will I learn in “TypeScript Setup in Vue Projects”?

vite.config.ts, tsconfig.json, vue-tsc, lang='ts' in SFCs, IDE TypeScript support. You practise Vue Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start Vue Academy?

No prior experience is required. Vue Academy on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 1 of 4.

How long does the “TypeScript Setup in Vue Projects” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this Vue Academy lesson?

Yes. Every Vue Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. TypeScript Setup in Vue Projects
  2. Typed Props and Emits with defineProps/defineEmits
  3. Typing Composables and Refs
  4. Generic Vue Components
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