What’s the best approach to integrate AI-powered autocomplete or suggestion features into a custom web-based form using JavaScript or Python? [closed]

I’m working on a web-based form and want to enhance the user experience by adding AI-powered autocomplete or suggestion features — similar to how Gmail or ChatGPT offers smart predictions while typing.

Specifically, I want the system to suggest relevant text, phrases, or options based on what the user is typing into a form input field (e.g., product descriptions, FAQs, support tickets).

I’m open to using JavaScript (frontend) for real-time interaction and Python (backend) for AI model handling.