How to Dynamically Load External Scripts in Vue.js Components?

Managing External Scripts in Vue.js Components

In Vue.js, external scripts can be integrated into components to extend their functionality. However, in certain scenarios, it may be desirable to dynamically load scripts based on specific user interactions. This article explores how to conditionally add external scripts to Vue.js components using the mounted() lifecycle hook.

Dynamic Script Loading with Mounted Hook

The mounted() hook is invoked when a Vue component is mounted to the document and provides a convenient way to dynamically modify the component's behavior. To add an external script, a <script> element is created, attributed with the script's source, and appended to the document head.</script>

<code class="html"><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></code>

Benefits of Conditional Loading

• Performance Optimization: Reduces initial load time by only loading scripts when they are required, avoiding unnecessary resource consumption.
• Improved User Experience: Ensures scripts are loaded only when needed, providing a more responsive application for users.

Conclusion

Dynamic script loading using the mounted() hook allows Vue.js components to conditionally include external scripts based on user interactions or specific scenarios. This approach enhances performance, improves the user experience, and provides greater flexibility for customizing component behavior.

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