𝗜 𝗕𝗨𝗜𝗟𝗧 𝗔 𝗠𝗢𝗗𝗘𝗥𝗡 𝗔𝗜 𝗔𝗦𝗦𝗜𝗦𝗧𝗔𝗡𝗧

𝗜 𝗕𝗨𝗜𝗟𝗧 𝗔 𝗠𝗢𝗗𝗘𝗥𝗡 𝗔𝗜 𝗔𝗦𝗦𝗜𝗦𝗧𝗔𝗡𝗧

Most AI tutorials are too simple. They show a basic API call and a response. I wanted a real application.

I built an AI assistant with vanilla HTML, CSS, and JavaScript.

Key features:

• Streaming responses.
• Dark and light modes.
• Markdown and syntax highlighting.
• Chat history persistence.
• Error handling and retry logic.

The tech stack:

• HTML5 and CSS3.
• Vanilla JavaScript.
• Marked.js and Prism.js.
• DOMPurify for security.
• Google Generative AI SDK.
• GitHub Pages for hosting.

Security is a priority. I used DOMPurify to clean AI responses. This prevents security risks.

User experience matters. I added streaming content. Users see text as it generates. They do not wait for a loading icon.

I used localStorage for chat history. This makes the app fast. It requires no backend.

Lessons learned:

• Fix edge cases.
• Focus on UX.
• Manage state.
• Secure AI output.

These details matter more than the AI model.

Build projects like this for your portfolio. You learn APIs, UI design, and state management.

What feature would you add?

• Voice input.
• File uploads.
• Memory.

Tell me in the comments.

Source: https://dev.to/codehuntersharath/i-built-a-modern-ai-assistant-using-html-css-and-javascript-4ca8 Video: https://youtu.be/nbFKG_6DkSE Optional learning community: https://t.me/GyaanSetuAi