Laravel 5.4 Vue.JS Failed to mount component: template or render function not defined
Stefan Bogdanescu
Founder & Senior Architect · 2026-06-29
# Debugging Vue Component Mounting Failures in Laravel: Solving "template or render function not defined"
As developers integrating modern JavaScript frameworks like Vue.js into the robust ecosystem of Laravel, we often encounter frustrating runtime errors, especially when dealing with asset bundling and component registration. One of the most common stumbling blocks is the error: `[Vue warn]: Failed to mount component: template or render function not defined`.
This post will dissect why this error occurs in a typical Laravel/Vue setup, using the provided configuration as a reference, and guide you through the systematic steps required to resolve it. We will explore the interplay between asset compilation (Webpack), JavaScript loading, and Vue's component registration lifecycle.
## Understanding the Error Context
The message `template or render function not defined` is Vue's way of telling you that when it tried to instantiate the component tag (``) in your HTML, it could not find the necessary structure (the ``) or the logic (the `render` function) associated with the component name (`Example`).
In the context of a Laravel setup where components are loaded via JavaScript bundles, this failure almost always points to an issue in the asset pipeline rather than the Vue code itself. The problem usually lies in how the dynamic module imports are resolved or how the compiled JavaScript is executed relative to the HTML structure.
## Analyzing the Setup Chain
Let's examine the specific flow presented in your example:
1. **Component Definition (`Example.vue`):** This file defines the component structure correctly.
2. **Registration (`app.js`):** You are using dynamic `require()` to register components: `Vue.component('example', require('./components/Example.vue'));`.
3. **View Loading (Blade):** The main view renders `