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Learn how to handle the "The onFormSubmit function in hbspt.forms.create requires jQuery" error in your Gatsby Single Page Application by integrating jQuery properly.
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How to Fix the jQuery Requirement Error in Hubspot Forms within Gatsby SPA

If you're working on integrating Hubspot forms into your Gatsby Single Page Application (SPA), you might come across an annoying error message: "The onFormSubmit function in hbspt.forms.create requires jQuery. It was not run." This can be frustrating, especially if your form is rendering correctly but fails upon submission. In this guide, we'll walk through why this error occurs and how you can resolve it effectively.

Understanding the Problem

The error you're encountering typically indicates that the Hubspot form requires jQuery to function properly. Since Gatsby is a framework that uses React to build SPAs, it doesn’t automatically include jQuery as a dependency. Therefore, when the Hubspot form tries to call onFormSubmit, it can't find jQuery in the DOM, leading to the error.

Solution: Integrating jQuery into Your Gatsby SPA

To resolve this issue, we need to ensure that jQuery is loaded before Hubspot's onFormSubmit function is executed. Here’s a step-by-step guide on how to do this:

Step 1: Modify the HubspotForm Component

You will need to adjust your HubspotForm component to check if jQuery is already included. If it's not, the component should add it dynamically.

Here's how your modified HubspotForm component should look:

[[See Video to Reveal this Text or Code Snippet]]

Breakdown of the Code Changes

Adding jQuery: The onReady callback fires once the Hubspot form is fully loaded. This is where we check if jQuery is already in the DOM.

Creating a script element: We create a new script element that points to the jQuery library and check existing script tags to ensure we do not add it multiple times.

Conditionally appending: If jQuery is not found, we append the script to the document body.

Empty onSubmit handler: We also added onSubmit={() => {}} to prevent the error from being triggered during form submission.

Benefits of This Approach

Dynamic Loading: You ensure that jQuery is only loaded when necessary, keeping your application lightweight.

Error Prevention: By confirming jQuery is in the DOM, you avoid potential issues with conflicting versions or repeated loads.

Conclusion

By following the steps outlined above, you should be able to eliminate the "The onFormSubmit function in hbspt.forms.create requires jQuery. It was not run." error from your Gatsby SPA. By dynamically loading jQuery, you ensure compatibility for your Hubspot forms, leading to a smoother user experience.

If you have any questions or further issues, feel free to share in the comments below!