How to add external JS scripts to VueJS Components

UPDATE: This no longer works in Vue 3. You will receive this error:

VueCompilerError: Tags with side effect ( and ) are ignored in client component templates.

---

If you are trying to embed external js scripts to the vue.js component template, follow below:

I wanted to add a external JavaScript embed code to my component like this:

<template>
  <div>
    This is my component
    <script src="https://badge.dimensions.ai/badge.js"></script>
  </div>
<template>

And Vue showed me this error:

Templates should only be responsible for mapping the state to the UI. Avoid placing tags with side-effects in your templates, such as , as they will not be parsed.

---

The way I solved it was by adding type="application/javascript" (See this question to learn more about MIME type for js):

<script type="application/javascript" defer src="..."></script>

---

You may notice the defer attribute. If you want to learn more watch this video by Kyle

I have downloaded some HTML template that comes with custom js files and jquery. I had to attach those js to my app. and continue with Vue.

Found this plugin, it's a clean way to add external scripts both via CDN and from static files https://www.npmjs.com/package/vue-plugin-load-script

// local files
// you have to put your scripts into the public folder. 
// that way webpack simply copy these files as it is.
Vue.loadScript("/js/jquery-2.2.4.min.js")

// cdn
Vue.loadScript("https://maps.googleapis.com/maps/api/js")

A simple and effective way to solve this, it's by adding your external script into the vue mounted() of your component. I will illustrate you with the Google Recaptcha script:

<template>
   .... your HTML
</template>

<script>
  export default {
    data: () => ({
      ......data of your component
    }),
    mounted() {
      let recaptchaScript = document.createElement('script')
      recaptchaScript.setAttribute('src', 'https://www.google.com/recaptcha/api.js')
      document.head.appendChild(recaptchaScript)
    },
    methods: {
      ......methods of your component
    }
  }
</script>

Source: https://medium.com/@lassiuosukainen/how-to-include-a-script-tag-on-a-vue-component-fe10940af9e8

using webpack and vue loader you can do something like this

it waits for the external script to load before creating the component, so globar vars etc are available in the component

components: {
 SomeComponent: () => {
  return new Promise((resolve, reject) => {
   let script = document.createElement('script')
   script.onload = () => {
    resolve(import(someComponent))
   }
   script.async = true
   script.src = 'https://maps.googleapis.com/maps/api/js?key=APIKEY&libraries=places'
   document.head.appendChild(script)
  })
 }
},