Challenges arising from the rendering of main.js in Vue.js

Recently, I started working with Vue and am now faced with the task of maintaining a project. Main.js contains the routing structure:

Main.js


import Vue from 'vue'

const app = new Vue({
    el: '#app',
    data: {
        message: 'Hello Vue!'
    }
});

pages/page.vue

<span>{{ message }}</span>

The challenge I'm encountering is trying to display the "message" from the data in an external template located at "../pages/page.vue". However, when I include {{message}}, I receive the following error:

[Vue Warn]: Property or method "message" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.

Any help would be greatly appreciated!

Answer №1

Within your project, a Vue instance has already been established for you to utilize across various components.

For a comprehensive explanation, refer to the documentation:

A Vue application is comprised of a primary Vue instance initialized with new Vue, potentially structured into a hierarchy of interconnected and reusable components.

The issue at hand arises from attempting to directly access data values from main.js in an external component (page.vue). The recommended approach is to transmit the data from main.js through properties.

If you require a functional demonstration, I have supplemented the sandbox with line comments that can aid in your understanding.

Please review it here:

https://codesandbox.io/s/81kj74409

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