Vue/Vite vanilla setup encountering a 'Failed to fetch dynamically imported module' TypeError

We're currently working with a vanilla Vue/Vite setup and I'm encountering the error message

TypeError: Failed to fetch dynamically imported module
in Sentry logs.

It appears that these errors coincide with new deployments to production, but I don't have enough data to confirm this. The issue doesn't occur locally and only manifests in the deployed code.
I've come across similar questions related to React setups, but none of them provided a satisfactory solution.
There was also a similar query regarding dynamically imported svgs, although our errors pertain to entire components.

The usage of dynamically imported components is limited to our routing configuration:

export const router = createRouter({
  history: routerHistory,
  strict: true,
  routes: [
    {
      path: '/',
      name: routes.homepage.name,
      component: () => import('@/views/Home.vue'),
      children: [
        {
          path: '/overview',
          name: routes.overview.name,
          component: () => import('@/views/Overview.vue'),
        },
        // other similar routes
      ],
    },
  ],
});

Our dependencies versions are as follows:

    "vue": "^3.0.9",
    "vue-router": "^4.0.5",
    "vite": "^2.0.5",

Any suggestions or insights on how to troubleshoot and resolve this issue would be highly appreciated!

Answer №1

When a route/component is imported dynamically, a separate chunk is created during the build process. By default, these chunks are named based on a hash of their content – for example, Overview.abc123.js. If the code of the component remains unchanged, the hash stays the same. However, if the code is modified, the hash will change as well - resulting in a filename like Overview.32ab1c.js. This system is beneficial for caching purposes.

Here's what occurs when encountering this error:

  1. The application is deployed
  2. The Home chunk contains a link to the /overview route, which references Overview.abc123.js
  3. A client visits the site
  4. Changes are made to the code, possibly affecting child components imported by Overview
  5. The changes are deployed, and Overview now has a new hash - Overview.32ab1c.js
  6. When the client clicks on the /overview link, they receive a
    Failed to fetch dynamically imported module
    error because Overview.abc123.js no longer exists

This issue is often tied to deployments. To resolve it, one option is to avoid using lazy loaded routes, but this may not be ideal for applications with heavy routes as it can increase the size of the main bundle.

Answer №2

The explanation provided in the accepted answer sheds light on when this error is triggered, but falls short in offering a viable solution.

To tackle this issue, I implemented an error handler within the router. This error handler ensures that upon encountering this error (specifically after deploying a new version of the app), the subsequent route change triggers a hard reload of the page instead of dynamically loading the modules. Here's what the code snippet looks like:

router.onError((error, to) => {
  if (error.message.includes('Failed to fetch dynamically imported module') || error.message.includes("Importing a module script failed")) {
    window.location = to.fullPath
  }
})

In this context, router refers to your vue-router instance.

Answer №3

The reason for my issue was forgetting to include the .vue extension in the module name.

import MyComponent from 'components/MyComponent'

Everything was fine with webpack, but Vite demands that the file extension be specified:

import MyComponent from 'components/MyComponent.vue'

Answer №4

Dealing with a similar problem, I found that certain routes were functioning while others were not. A simple fix resolved the issue - restarting the development server did the trick.

Answer №5

Although I found Wouter Sioen's solution to be effective, a new issue arose for me following the implementation of his fix. Whenever there is a chunkLoad error, I would receive an error message stating "Cannot read properties of undefined (reading 'fullPath')." To address this, I modified the solution as follows:

router.onError((error, destination) => {
  if (
    error.message.includes('Failed to fetch dynamically imported module') ||
    error.message.includes('Importing a module script failed')
  ) {
    if (!destination?.fullPath) {
      window.location.reload();
    } else {
      window.location = destination.fullPath;
    }
  }

Answer №6

I found that the issue was resolved by clearing the cache and .vite files before restarting the server.

# Stop your development server first
rm -rf node_modules/.cache node_modules/.vite;
# Start the server again
npm run dev

Answer №7

Similar to my experience, I encountered issues with my Quasar setup working on the main page but not on dynamically loaded pages.

To address this issue:

I made a simple adjustment by changing import('../pages/TestPage.vue') in the route file to

import TestPage from '../pages/TestPage.vue'
at the beginning of the file.

Here is a more detailed explanation:

Since I didn't anticipate having too many pages and preferred a single bundle without dynamic loading, I decided to statically import every page I needed.

In my routes.ts file, I imported all the necessary pages:

import IndexPage from '../pages/IndexPage.vue';
import TestPage from '../pages/TestPage.vue';

Then, I included them in my routes as static imports:

const routes: RouteRecordRaw[] = [
  {
    path: '/',
    component: () => import('layouts/MainLayout.vue'),
    children: [
      { path: 'test', component: () => TestPage },
      { path: '', component: () => IndexPage }
  ],
  },
  // Make sure to keep this section last,
  // or you can remove it altogether
  {
    path: '/:catchAll(.*)*',
    component: () => import('pages/ErrorNotFound.vue'),
  },
];

Answer №8

Just had a similar experience myself. The issue arose from having an empty href attribute within an anchor tag: <a href="" @click="goToRoute">. To resolve this, you can either eliminate the href altogether or consider switching the anchor tag to a different element like a button. Please feel free to reach out if you need further assistance.

Answer №9

If you're like me and stumbled upon this article seeking a solution, Vite has now introduced a new event:

"vite:preloadError"

Here's an example of how to use it:

window.addEventListener('vite:preloadError', (event) => {
  window.location.reload() // you can refresh the page here
})

Check out the documentation.

This feature was included in version 4.4 through this commit. I wasn't aware of it initially, so I had to update my vite package.

Answer №10

The issue arose when I mistakenly named my component as "VIewerPage.vue" with an uppercase "I", which was hard to spot at first glance. This error occurred because I referenced it as ViewerPage.vue in my router code, leading to the same problem.

Answer №11

router.handleErrors((error, destination) => {
  if (error.message.contains('Error loading dynamic module')) {
    window.location = destination.URL
  }
})

Answer №12

In my case, I encountered a problem with an outdated import statement in the current page component file. Once I removed this import, the issue was resolved.

import NonexistingComp from '/components/NonExistingComp.vue';

Additionally, there was an error message displayed in my terminal:

The attempt to load url /components/NonExistingComp.vue (resolved id: /components/NonExistingComp.vue) in /components/PageComponent.vue failed. Is the file present?

Answer №13

The issue I encountered was due to omitting the .jsx extension in a file name, when .jsx was actually required as the extension.

For instance, rather than using InboxScreen.stories.js

the correct format is InboxScreen.stories.jsx

Answer №14

After taking into consideration the explanations from @domnantas, along with the solutions provided by @Sioen and @Giedrius,

I made sure to eliminate any potential infinite redirects.

router.onError((error) => {
  console.error('router.onError', error)

  const isDeployError =
    error.message.includes('Failed to fetch dynamically imported module') ||
    error.message.includes('Importing a module script failed')

  if (isDeployError) errorReload(`Error during page load, ${error.message}`)
})

Additionally, here is the errorReload function:

export const errorReload = (error: string, retries = 1) => {
  // Obtain the current URL
  const urlString = window.location.href

  // Create a URL object
  const url = new URL(urlString)
  const errRetries = parseInt(url.searchParams.get('errRetries') || '0')
  if (errRetries >= retries) {
    window.history.replaceState(null, '', url.pathname)
    // useSnackbarStore().add(error, { reload: true })
    return
  }

  // Update or add the query parameter
  url.searchParams.set('errRetries', String(errRetries + 1))

  // Reload the page with the updated URL
  window.location.href = url.toString()
}

Answer №15

I encountered a similar problem with my Vue router, but it turned out the issue was not with the router itself. Instead, I found that the problem lied within my view code. After making some adjustments to the view, everything rendered correctly!

Answer №16

It appears that there is a change in file names after deployment. To ensure that the original file names are preserved, we can modify the Vite config as follows:

// vite.config.js
import { defineConfig } from 'vite';
import vue from '@vitejs/plugin-vue';

export default defineConfig({
  plugins: [vue()],
  build: {
    //  ...other configurations
    rollupOptions: {
      // ...other options
      output: {
        assetFileNames: '[name].[ext]', // Preserve original file names
      }
    }
  }
});

By doing this, we can be certain that the necessary files will be correctly identified even after deployment. Here's what each placeholder represents:

  • [name] - refers to the name of the file that we want to dynamically import
  • [ext] - refers to the extension of the file that we want to dynamically import (in our case: *.vue)

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Directive's ng-click function fails to execute

This directive contains a function that should be executed when clicked. ebApp.directive('monthDir', function () { return { restrict: 'E', templateUrl: 'htmlFiles/monthDirective.html', transclu ...

Challenges when using deep linking to URL with AngularJS ui-router

Recently, I encountered an issue after restructuring the folder organization of my AngularJS application. Although I believe this might be a distraction from the root cause, I moved a section of functionality to its own directory for better organization. A ...

Monitoring a specific property within an array of objects with AngularJS

I am facing an issue with the data in my controller $scope.data = { home: { baseValue: "1", name: "home" }, contact: { baseValue: "2", name: "contract" } // numerous ...

When the value of a Formcontrol is changed using valueAccessor.writeValue(), it remains unchanged

Encountering a similar issue as seen in this stack overflow post, but the solution provided isn't resolving the issue. Perhaps you can offer assistance on that thread. In my scenario, I have created a directive for formatting phone numbers: import { ...

React Native: error - unhandled action to navigate with payload detected by the navigator

Having trouble navigating from the login screen to the profile screen after email and password authentication. All other functions are working fine - I can retrieve and store the token from the auth API. However, when trying to navigate to the next screen, ...

How to reveal hidden Div element at a specific index with Angular Material table

In my mat-table, there are several functionalities available: 1. The ability to add or remove rows 2. Adding data into a row using different controls such as combo-boxes, text boxes, etc. One of the controls is a text box labeled "Additional Information ...

Error in Browserify Express App: Unexpected token while parsing the file

I have been attempting to browserify a javascript file. When I run the command: browserify global.js -o bundle.js An error message is returned: Error: Parsing file C:\ocquiz\public\javascripts\global.js: Unexpected token (756 ...

What is the best approach to configure Nuxt.js to recognize both `/` and `/index.html` URLs?

Currently, I have set up my Nuxt.js in default mode with universal and history router configurations. After running nuxt generate, the generated website includes an index.html file in the dist folder. This means that when the website is published, it can ...

Error: discord-webhooks causing SyntaxError due to an unexpected identifier in JavaScript code

I am currently working on a javascript project to set up a webhook for Discord. The URL has been removed for privacy reasons. const DiscordWebhook = require("discord-webhooks"); let myWebhook = new DiscordWebhook("removedtopostonstackexchange") myWebhook. ...

Scraping dynamic content with Python for websites using JavaScript-generated elements

Seeking assistance in using Python3 to fetch the Bibtex citation produced by . The URLs follow a predictable pattern, enabling the script to determine the URL without requiring interaction with the webpage. Attempts have been made using Selenium, bs4, amon ...

Customize the appearance of Woocommerce's blockUi feature with your

During an Ajax request, blockUI adds a style to the blocks of the checkout form and cart with "background: '#fff'". However, my entire website theme is black and I do not want the background color of the blocks to be white. Is there a way to remo ...

Ways to dynamically update CSS properties (such as changing the color scheme throughout the entire application)

I have a question... If you're interested in conditional styling, the best approach is to utilize either ng-class or ng-style. However... For instance, let's say I'm an admin and I would like to customize the color of my application using ...

Exploring Elasticsearch with Ajax Query Syntax

Attempting to send a post request via AJAX to my Elasticsearch index but encountering some issues. Here's the cURL result: [~]$ curl -XGET 'http://localhost:9200/firebase/_search?q=song:i%20am%20in' {"took":172,"timed_out":false,"_shards": ...

Is there an issue with this npm version number?

I am trying to include the following dependency in the package.json file of my npm package: "redux-saga": "^1.0.0-beta.0 || ^0.16.0"`. When I install this package in a project that already has "redux-saga": "^1.0.0-beta.1 I am expecting npm/yarn to on ...

Activate a timer as soon as the page is first loaded. The timer must continue running from the initial load even if the user leaves

Looking to implement a time-limited offer on the first stage of our checkout process. The timer should start at 5 minutes when the page loads and continue counting down even if the user leaves the page and returns. Has anyone come across a script that can ...

When implementing JWT for route authentication, the webpage remains frozen in one spot

Currently, I am in the process of making modifications to a project. The front-end is built using Vue 2.0 and the back-end utilizes Node.js Express. To ensure security, I have implemented the JWT approach by requiring authentication for all pages except th ...

Tips for utilizing template tags with the Vue root component

As I work on improving a page within a web application with Vue, I have typically written single file components and have preferred defining the html template at the start of the file using the <template> tag. Is there a method to utilize this tag w ...

Nested modal in native app utilizes the React Carbon TextInput component for an uneditable input field

As a newcomer to React, I have encountered an issue with the Tauri framework used to bundle my React application as a desktop app. Specifically, I am facing a problem where the TextInput field, nested inside a modal and utilizing React Carbon components, i ...

Semantic UI (React): Transforming vertical menu into horizontal layout for mobile responsiveness

I have implemented a vertical menu using Semantic UI React. Here is the structure of my menu: <Grid> <Grid.Column mobile={16} tablet={5} computer={5}> <div className='ui secondary pointing menu vertical compact inherit&apos ...

Cannot assign Angular 4 RequestOptions object to post method parameter

I'm having trouble with these codes. Initially, I created a header using the code block below: headers.append("Authorization", btoa(username + ":" + password)); var requestOptions = new RequestOptions({ headers: headers }); However, when I tried to ...