New Jul 1, 2026

Error event not triggered after Vite build

Libraries, Frameworks, etc. All from Newest questions tagged vue.js - Stack Overflow View Error event not triggered after Vite build on stackoverflow.com

I'm working on a Vue.js project and in the App.vue file I wrote this code that reacts to all exceptions and rejections of my app.

  window.addEventListener('error', event => {
    errorDialog.value = true
    errorMessage.value = event.error.message
  })

window.addEventListener('unhandledrejection', event => { errorDialog.value = true errorMessage.value = event.reason.message })

In dev mode everything works smoothlessly... But once built it gets weird...

After many tests I understood that : it doesn't work when and only when the exception is thrown directly by an eventlistener.

To be clearer here is a usecase

<template>
    <button @click="onClick_1()">CLIK ME</button>
    <button @click="onClick_2()">CLIK ME</button>
    <button @click="onClick_3()">CLIK ME</button>
    <button @click="onClick_4()">CLIK ME</button>
</template>

<script setup> function onClick_1 () { throw '1' // Doesn't trigger anything }

async function onClick_2 () { /** With or without 'await' here **/ throw '2' // Doesn't trigger anything }

function onClick_3 () { (async () => { throw '3' // Triggers the unhandledrejection listener })() }

async function onClick_4 () { (async () => { throw '4' // Triggers the unhandledrejection listener })() } <script>

Could someone please explain what's the ding-dong here and how to fix it ?

Thank you in advance !

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