How to Add External JS Scripts to VueJS Components?

VueJS is a popular front-end JavaScript framework that allows us to develop single-page web applications with the help of components. We can also add external JS scripts in the framework to integrate any 3rd party web services into our application.

Below are the approaches to add external JS scripts to VueJS components:

Steps to create the VueJS app:

Step 1: Create an app

We will create a vue app with the below commands. We will then use this app to use video.js library.

vue create sample-vue

This will create a sample vue application with the below project structure.

Step 2: Go to the folder

cd sample-vue

Project structure:

Using VueJS lifecycle hooks

In this approach, we will use the VueJS lifecycle hooks to create a script HTML node, and then insert that script node into the document itself.

Example: In this example, we will insert the script in the mounted lifecycle hook of VueJS.

HTML

//App.vue

<template>
    <div>
        <h1>Hello Vue.js!</h1>
    </div>
</template>

<script>
    export default {
        mounted() {
            const script = document.createElement("script");
            script.src =
"https://cdn.jsdelivr.net/npm/hello-world-js@0.0.2/src/index.min.js";
            document.body.appendChild(script);
        },
    };
</script>

Steps to run the server:

Now, we will run our web application by running the below command –

 pnpm serve

Output:

Import in a specific Vue component

In this approach, we will install the NPM package corresponding the script, and then use that package in our components. we will use the installed package in the App.vue file, and just call the method “helloWorld”, which is provided the package itself, when the component gets mounted.

pnpm install hello-world-npm

Example: In this example, we will install an NPM package, and then import that package to use it in the component.

JavaScript

<template>
    <div>
        <h1>Hello Vue.js!</h1>
    </div>
</template>

<script>
    import { helloWorld } from "hello-world-npm";

    export default {
        mounted() {
            console.log(helloWorld());
        },
    };
</script>

Steps to run the server:

Now, we will run our web application by running the below command –

 pnpm serve

Output: