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Illustration of a smart contact form showing real-time validation, disabled submit button, and business email verification features.
HubDevMay 17, 2025 1:46:25 AM< 1 min read

Building a Smart Contact Form with Real-Time Validation and Business Email Check

Creating a user-friendly and reliable contact form is essential for any website, especially when you want to capture quality leads. A good form should not only check if all required fields are filled but also validate the inputs properly and provide helpful feedback instantly.

In my recent project, I built a custom contact form with several important features:

  • It validates inputs like names, phone numbers, job titles, and company details in real-time.

  • It displays clear error messages right next to the fields if the user enters invalid data.

  • It enforces the use of business email addresses by blocking common free or disposable email domains, improving lead quality.

  • The submit button is disabled until all inputs are valid, preventing accidental submissions.

  • The form supports keyboard accessibility by allowing submission with the Enter key once everything is valid.

This approach enhances user experience by guiding users to fix errors immediately, and it helps businesses gather more meaningful contact information.

If you want to see this form in action or explore the full code, check out the live demo on CodePen.

View the Contact Form on CodePen

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HubDev

I build flexible, easy-to-use HubSpot themes, templates, and modules that integrate seamlessly with the rest of your HubSpot tools. Let me handle the technical aspects so you can focus on your marketing campaigns.

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