Setting compilerOptions.isCustomElement for VueJS 3 in a Laravel project: A step-by-step guide

I am currently working on integrating VueJS 3 into a Laravel project and utilizing a JS file to implement a markdown toolbar. The JS file contains functions that generate buttons for applying various markdown options. Everything is functioning properly, but I am encountering console errors that I would like to resolve.

These errors are all in the same format, such as:

Failed to resolve component: md-linedivider
If this is a native custom element, make sure to exclude it from component resolution via compilerOptions.isCustomElement. 
  at <Markdowntoolbar> 
  at <Article onVnodeUnmounted=fn<onVnodeUnmounted> ref=Ref< undefined > > 
  at <BaseTransition mode="out-in" appear=false persisted=false  ... > 
  at <Transition enter-active-class="animate__animated animate__fadeInLeft" leave-active-class="animate__animated animate__bounceOutUp" mode="out-in" > 
  at <RouterView> 
  at <App> 
  at <Bodycomponent> 
  at <App>

The error message indicates that the md-linedivider element should be excluded from component resolution through compilerOptions.isCustomElement. I have searched extensively for a solution and only came across this reference, but I do not have vue.config.js in my Laravel project to implement this change. I attempted to make adjustments in webpack.mis.js and app.js, but unfortunately, it did not resolve the issue.

Any suggestions or insights would be greatly appreciated.

Answer №1

Here is a suggestion for your webpack.mix.js file:

mix.js('resources/assets/js/app.js', 'public/js').vue({
  options: {
    compilerOptions: {
      isCustomElement: (tag) => ['md-linedivider'].includes(tag),
    },
  },
});

UPDATE 4.8.22 - for Vite projects: vite.config.js

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

export default defineConfig({
  plugins: [
    vue({
      template: {
        compilerOptions: {
          isCustomElement: (tag) => ['md-linedivider'].includes(tag),
        }
      }
    })
  ]
})

Answer №2

When working with Nuxt3, you have the ability to define values in your nuxt.config.ts file like this:

export default defineNuxtConfig({
  vue: {  
    compilerOptions: {
      isCustomElement: (tag) => ['lite-youtube'].includes(tag),
    },
  }
})

Answer №3

Implementing vue.js with vite:

To integrate vue.js with vite, update your vite.config.js/ts

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [
    vue({
      template: {
        compilerOptions: {
          isCustomElement: (tag) => {
            return tag.startsWith('ion-') // (return true)
          }
        }
      }
    })
  ]
})

If you are using a version of
Vue.js that includes the runtime compiler (also known as "full build")
, follow these steps:

Update your main.js/ts

// Specify tags starting with 'ion-' as custom elements
app.config.compilerOptions.isCustomElement = (tag) => {
  return tag.startsWith('ion-') // (return true)
}

Refer to the vue3 documentation for more information on this topic: https://vuejs.org/api/application.html#app-config-compileroptions

Answer №4

While working with Vue3, I encountered a similar issue where I mistakenly used component instead of the correct form, which is components. This small typo caused a warning to appear in the typing errors section.

Answer №5

Summary:

If you want Vue to recognize custom elements, make sure to utilize the components property as shown below.

import CustomElement from "../path/file.vue";

export default {
  components: {
    CustomElement
  },
  ...
}

Then, in your HTML, you can use either <custom-element /> or <CustomElement />.

Answer №6

One situation I encountered was having a global component called view, but mistakenly referencing it as View. This resulted in receiving the warning message.

Answer №7

This incredible library focuses on creating custom components in a simple and efficient manner: https://github.com/antfu/unplugin-vue-components

// vite.config.ts
import Components from 'unplugin-vue-components/vite'

export default defineConfig({
  plugins: [
    Components({ /* options */ }),
  ],
})

Answer №8

Experiencing issues with your app after adding compilerOptions? Find a solution below...


You might have noticed that your warnings disappeared after making adjustments like the following:

If you are using Vuetify, you may need to include all custom elements starting with v-

export default defineConfig({
  plugins: [
    vue({
      template: {
        compilerOptions: {
          isCustomElement: (tag) => {
            return tag.startsWith('v-') 
          }
        }
      }
    })
  ]
})

While clearing warnings is beneficial, if your app is now functioning improperly, consider creating a vitest.config.ts file.

This will allow Vitest to use a different configuration for testing specified in vitest.config.ts, while the build or dev script will still utilize the original settings from vite.config.ts.

To achieve this:

Copy and paste the contents of your code from vite.config.ts into vitest.config.ts, then remove the compilerOptions or template from the vue() plugin, leaving your vite.config.ts unaltered.

Ensure to carefully follow the documentation on configuration

By doing so, everything should function seamlessly ✔️

Answer №9

Following numerous attempts over a span of 10 hours, I discovered that in my unique scenario, the child element was unintentionally importing the parent element. This import was unnecessary and remained from previous code restructuring. Surprisingly, this insignificant import appeared to disrupt the sequence in which elements were being generated.

Answer №10

When incorporating vue-loader with webpack, you have the ability to specify compiler options for the vue-loader rule in this manner:

module.exports = {
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: "vue-loader",
        options: {
          enableTsInTemplate: true,
          compilerOptions: {
            isCustomElement: (tag) => ["hidden", "font"].includes(tag)
          }
        },
      },
    ]
  }
}

Answer №11

When working on my Vue 3 and Vite project, I encountered a problem due to mistakenly declaring components as an array instead of an object.

import MyComponent from "@/components/common/MyComponent";
//components: [MyComponent] <-- This caused issues
components: {MyComponent}

Answer №12

Encountering a similar issue, I discovered that the setup attribute was missing within the script tag.

Answer №13

When you define two components in your JavaScript file like this:

  components: {
    Field
  },
  
  components: {
    Test
  }

You may encounter a problem with duplicate component declarations.

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