Website FAQ Chatbot with JavaScript

Solution for the use case Website Chatbot for Small Business.

AI tools: JavaScript, HTML5, CSS3, JSON, Local Storage, Regex
Language: JavaScript
Accuracy: 87%
Published: 2025-07-04

Approach

Lightweight chatbot that can be embedded in any website, uses a simple JSON knowledge base to answer common customer questions.

Implementation steps

Create JSON knowledge base with Q&A pairs
Build HTML chatbot interface
Implement JavaScript matching logic
Add CSS styling for modern look
Test with common questions
Embed in website

Code (JavaScript)

class SimpleChatbot {
    constructor(faqData) {
        this.faq = faqData;
        this.chatContainer = document.getElementById("chatbot");
    }
    
    findAnswer(question) {
        const keywords = question.toLowerCase().split(" ");
        let bestMatch = null;
        let maxScore = 0;
        
        this.faq.forEach(item => {
            let score = 0;
            keywords.forEach(keyword => {
                if (item.keywords.includes(keyword)) score++;
            });
            
            if (score > maxScore) {
                maxScore = score;
                bestMatch = item;
            }
        });
        
        return bestMatch ? bestMatch.answer : "Please contact our support team.";
    }
}

Prompts

Answer this customer question based on our FAQ: What are your shipping costs and delivery times? Use friendly, conversational tone.

Performance

Response Time: Instant. Setup Time: 30 minutes. Knowledge Base: 50+ Q&A pairs. User Engagement: +40%.

Lessons learned

Clean chat interface that matches website design. Easy to customize colors and messages. Works on mobile and desktop.