How to Load External JS Scripts in VueJS Components on Demand?
Nov 04, 2024 pm 04:34 PM
Loading External JS Scripts in VueJS Components on Demand
In Vue.js applications, you may encounter scenarios where specific components require external JavaScript scripts. By default, external scripts are added to the index.html file, which can lead to unnecessary loading when those scripts are not immediately needed.
To address this issue, Vue.js provides a convenient way to dynamically load external scripts within components, ensuring they are available only when necessary. This technique involves utilizing the mounted() lifecycle hook.
Solution:
The following code snippet demonstrates how to load an external script within a Vue.js component using the mounted() hook:
<code class="html"><template>
... your HTML
</template>
<script>
export default {
data: () => ({
... data for your component
}),
mounted() {
let externalScript = document.createElement('script')
externalScript.setAttribute('src', 'https://example.com/external-script.js')
document.head.appendChild(externalScript)
},
methods: {
... methods for your component
}
}
</script></code>
Benefits:
- Selective loading: External scripts are loaded only when the component is mounted, optimizing performance.
- Modularity: Components can remain independent, as the external scripts are loaded separately.
- Enhanced performance: By loading scripts on demand, you avoid unnecessarily bloating the page load time.
Example Source:
This solution was adapted from an article by Lassi Iso-Uosukainen: https://medium.com/@lassiuosukainen/how-to-include-a-script-tag-on-a-vue-component-fe10940af9e8
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