# "ionic start" for vue broken? supportedTSExtensions error

**URL:** <https://forum.ionicframework.com/t/ionic-start-for-vue-broken-supportedtsextensions-error/245493>\
**Category:** Ionic Vue\
**Created:** [December 5, 2024, 3:49pm UTC](https://forum.ionicframework.com/t/ionic-start-for-vue-broken-supportedtsextensions-error/245493 "2024-12-05T15:49:58Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![tkclark](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/tkclark/32/144585_2.png) [@tkclark](https://forum.ionicframework.com/u/tkclark)\
**Post date:** [December 5, 2024, 3:49pm UTC](https://forum.ionicframework.com/t/ionic-start-for-vue-broken-supportedtsextensions-error/245493/1 "2024-12-05T15:49:58Z")

</div>

When I run the following I get an error:

`ionic start`

I do not use the wizard, I pick “Vue” as framework and “blank” as template. I then cd into the dirctory.

I run

`npm i` and then

`npm run build`

and I get the error:

```auto
$ npm run build

> blank1@0.0.1 build
> vue-tsc && vite build

/Users/tylerclark/Github/blank1/node_modules/vue-tsc/index.js:34
            throw err;
            ^
Search string not found: "/supportedTSExtensions = .*(?=;)/"
(Use `node --trace-uncaught ...` to show where the exception was thrown)

Node.js v18.20.2

```

No other part of the project was touched. No, I didn’t run `npm run dev` as running it is fine but when I try to deploy to Firebase with Github Actions it’ll crash at this step.

Package.json for reference: (I just did this this morning)

```auto
{
  "name": "blank1",
  "private": true,
  "version": "0.0.1",
  "type": "module",
  "scripts": {
    "dev": "vite",
    "build": "vue-tsc && vite build",
    "preview": "vite preview",
    "test:e2e": "cypress run",
    "test:unit": "vitest",
    "lint": "eslint ."
  },
  "dependencies": {
    "@capacitor/app": "6.0.2",
    "@capacitor/core": "6.2.0",
    "@capacitor/haptics": "6.0.2",
    "@capacitor/keyboard": "6.0.3",
    "@capacitor/status-bar": "6.0.2",
    "@ionic/vue": "^8.0.0",
    "@ionic/vue-router": "^8.0.0",
    "ionicons": "^7.0.0",
    "vue": "^3.3.0",
    "vue-router": "^4.2.0"
  },
  "devDependencies": {
    "@capacitor/cli": "6.2.0",
    "@vitejs/plugin-legacy": "^5.0.0",
    "@vitejs/plugin-vue": "^4.0.0",
    "@vue/eslint-config-typescript": "^12.0.0",
    "@vue/test-utils": "^2.3.0",
    "cypress": "^13.5.0",
    "eslint": "^8.35.0",
    "eslint-plugin-vue": "^9.9.0",
    "jsdom": "^22.1.0",
    "terser": "^5.4.0",
    "typescript": "^5.1.6",
    "vite": "~5.2.0",
    "vitest": "^0.34.6",
    "vue-tsc": "^2.0.22"
  },
  "description": "An Ionic project"
}

```

---

<div class="post-metadata">

**Author:** ![tkclark](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/tkclark/32/144585_2.png) [@tkclark](https://forum.ionicframework.com/u/tkclark)\
**Post date:** [December 5, 2024, 4:06pm UTC](https://forum.ionicframework.com/t/ionic-start-for-vue-broken-supportedtsextensions-error/245493/2 "2024-12-05T16:06:12Z")

</div>

I changed `vue-tsc` to `2.1.10` and `typescript` to `5.6.2` and it appears to be working

---

<div class="post-metadata">

**Author:** ![twestrick](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/twestrick/32/136131_2.png) [@twestrick](https://forum.ionicframework.com/u/twestrick)\
**Post date:** [December 5, 2024, 4:12pm UTC](https://forum.ionicframework.com/t/ionic-start-for-vue-broken-supportedtsextensions-error/245493/3 "2024-12-05T16:12:19Z")

</div>

Yeah, this is related to [vue-tsc not work with typescript 5.7.2 · Issue #5018 · vuejs/language-tools · GitHub](https://github.com/vuejs/language-tools/issues/5018).

I just had to lock TypeScript at `5.6.3`.

This is what my `package.json` looks like:

```auto
"typescript": "~5.6.3",
"vue-tsc": "^2.0.0",

```

---

<div class="post-metadata">

**Author:** ![tkclark](https://sea1.discourse-cdn.com/ionicframework/user_avatar/forum.ionicframework.com/tkclark/32/144585_2.png) [@tkclark](https://forum.ionicframework.com/u/tkclark)\
**Post date:** [December 5, 2024, 4:39pm UTC](https://forum.ionicframework.com/t/ionic-start-for-vue-broken-supportedtsextensions-error/245493/4 "2024-12-05T16:39:48Z")

</div>

Yeah I just stumbled upon that. So annoying that things break FOR DAYS. This cost me like 4-5 hours of my life because I was in “update my app” mode at the same time.