Adding an external script to a Vue.js template

Delving into the world of Vue.js and web-pack, I opted to utilize the vue-cli (webpack) for scaffolding an initial application. A challenge arose when attempting to incorporate an external script (e.g <script src="...") in a template that isn't required globally across every page or component. Vue raised a warning against this practice.

The structure of my index.html closely resembles the initially generated one:

<html lang="en">

<head>
  <title>App</title>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">

</head>

<body>
  <div id="app"></div>

  <!-- jQuery first, then Tether, then Bootstrap JS. -->
  <script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
</body>

</html>

The App.vue file mirrors the default setup:

<template>
<div id="app">

  <div class="container pt-5">
    <router-view></router-view>
  </div>

</div>
</template>

Incorporating a route to /upload within my routes file leads to an Upload component requiring dropzone.js (an external script). While including it in index.html like bootstrap is loaded is feasible, loading it universally for all pages/components isn't optimal considering only this specific component necessitates it.

Despite this, directly embedding it in the template file faces challenges:

<template>
<div>
  <h2>Upload Images</h2>
  <form action="/file-upload" class="dropzone">
    <div class="fallback">
      <input name="file" type="file" multiple />
      <input type="submit" value="upload" />
    </div>
  </form>
</div>

<script src="https://example.com/path/to/dropzone"></script>
</template>

<script>
export default {
  data() {
    return {}
  }
}
</script>

<style>  
</style>

Is there a way to include an external script exclusively for one component?

Answer №1

To handle the loading of scripts in your Vue component, you can create a method specifically for that purpose and then invoke it within either the mounted or created lifecycle hook. Here's an example:

<script>
      export default {
        data() {
          return {}
        },
        methods: {
          loadScript(url, callback) {
            jQuery.ajax({
              url: url,
              dataType: 'script',
              success: callback,
              async: true
            });
          }
        },
        mounted() {
          this.loadScript('url_to_someScript.js', function() {
            // Perform actions after someScript has finished loading
          });
        }
      }
</script>

Answer №2

It's important to note that script tags are inherently global. When it comes to working with modules systems, adding script tags directly into templates is not the recommended approach.

To incorporate a script like dropzone into your project, you can easily install it as a node module using npm by running npm install dropzone --save.

After installation, remember to import it within your component code like this:

import drozone from 'dropzone';
export default {
  // Component code...
}

Keep in mind that without utilizing webpack code splitting, dropzone will be included in the bundle for every page. If you want to learn more about how to optimize bundle splitting with Vue Router, check out the official tutorial here.

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