Understanding the Client Testimonial Source Code

Imagine you're working on a website for a company, and they want to show off what their happy customers have to say. This little section of code creates a neat, sliding testimonial carousel  like a slideshow where each "slide" shows a different customer review.

 

Understanding the Client Testimonial Source Code

 

 

We're going to walk through this in plain English. You don't need to be an expert  just a little curious.






Step 1: HTML Structure (The Frame)

 

 

Understanding the Client Testimonial Source Code

 

 

 

The HTML part is like the bones of the page. It's where you lay out what shows up on the screen.

 

Inside the <head> section:

 

  • Fonts and icons are loaded. For example:
    • One link brings in cool star icons from Font Awesome.
    • Another link loads the "Roboto" font from Google, which makes the text look nicer.
    • There's also a reference to an external styles.css file, which controls the colors, layout, and spacing.


Style.css




:root {
    --primary-color: #1976d2;
    --primary-light: #e3f2fd;
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.6);
    --divider: rgba(0, 0, 0, 0.12);
    --background: #f5f5f5;
    --paper: #ffffff;
    --rating-color: #ffb400;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.5;
}

.testimonial-container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
    padding: 40px 20px;
}

.section-title {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.testimonial-carousel {
    position: relative;
    overflow: hidden;
    margin: 0 auto 40px;
    width: 100%;
}

.testimonial-slide {
    position: absolute;
    width: 100%;
    padding: 0 15px;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-slide.active {
    opacity: 1;
    position: relative;
}

.testimonial-card {
    background-color: var(--paper);
    border-radius: 4px;
    padding: 32px;
    box-shadow: 0px 2px 1px -1px rgba(0,0,0,0.2), 
                0px 1px 1px 0px rgba(0,0,0,0.14), 
                0px 1px 3px 0px rgba(0,0,0,0.12);
    transition: box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.testimonial-card:hover {
    box-shadow: 0px 3px 5px -1px rgba(0,0,0,0.2), 
                0px 5px 8px 0px rgba(0,0,0,0.14), 
                0px 1px 14px 0px rgba(0,0,0,0.12);
}

.quote-icon {
    font-size: 2.5rem;
    color: var(--primary-light);
    opacity: 0.8;
    position: absolute;
    top: 16px;
    right: 24px;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin-bottom: 24px;
    text-align: left;
    position: relative;
    z-index: 1;
    font-weight: 400;
}

.client-info {
    display: flex;
    align-items: center;
    text-align: left;
}

.client-img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 16px;
    border: 2px solid var(--primary-light);
}

.client-details {
    flex: 1;
}

.client-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.client-role {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.rating {
    color: var(--rating-color);
    font-size: 0.875rem;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 24px;
}

.mui-btn {
    background-color: transparent;
    color: var(--primary-color);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1rem;
    cursor: pointer;
    margin: 0 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mui-btn:hover {
    background-color: rgba(25, 118, 210, 0.04);
}

.mui-btn:active {
    background-color: rgba(25, 118, 210, 0.12);
}

.indicators {
    display: flex;
    gap: 8px;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--divider);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.indicator.active {
    background-color: var(--primary-color);
    transform: scale(1.3);
}

/* Responsive design */
@media (max-width: 768px) {
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 0.875rem;
    }
    
    .testimonial-card {
        padding: 24px 16px;
    }
    
    .testimonial-text {
        font-size: 0.875rem;
    }
    
    .client-img {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 480px) {
    .client-info {
        flex-direction: column;
        text-align: center;
    }
    
    .client-img {
        margin-right: 0;
        margin-bottom: 12px;
    }
    
    .testimonial-text {
        text-align: center;
    }
    
    .client-details {
        text-align: center;
    }
}


 

The <body> has the actual content users see:

 

We start with a title like:

 

<h1>Client Testimonials</h1>
<p>Hear what our customers say about us</p>

 

This introduces the section.

 

Then comes the main part: a carousel of testimonials. Each testimonial is wrapped in a "slide." Each one shows:

 

  • A quote icon.
  • The customer's feedback.
  • A photo of the person.
  • Their name and job.
  • A star rating.

 

This is repeated three times — for three different people. Think of each one as a card in a slideshow.






Step 2: Carousel Navigation

 

Below the testimonials, there are left and right arrows:

 

<button class="prev-btn">←</button>
<button class="next-btn">→</button>

 

There are also little dots (called indicators). These let you jump to a specific testimonial. One dot is highlighted at a time, depending on which slide you're on.



HTML




<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Client Testimonials</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <div class="testimonial-container">
        <h1 class="section-title">Client Testimonials</h1>
        <p class="section-subtitle">Hear what our customers say about us</p>
        
        <div class="testimonial-carousel">
            <div class="testimonial-slide active">
                <div class="testimonial-card">
                    <div class="quote-icon"><i class="fas fa-quote-left"></i></div>
                    <p class="testimonial-text">This service completely transformed my business. The results were beyond my expectations and the team was incredibly professional throughout the entire process.</p>
                    <div class="client-info">
                        <img src="https://randomuser.me/api/portraits/women/32.jpg" alt="Client" class="client-img">
                        <div class="client-details">
                            <h4 class="client-name">Sarah Johnson</h4>
                            <p class="client-role">CEO, TechSolutions</p>
                            <div class="rating">
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            
            <div class="testimonial-slide">
                <div class="testimonial-card">
                    <div class="quote-icon"><i class="fas fa-quote-left"></i></div>
                    <p class="testimonial-text">I've worked with many companies in the past, but none have delivered the level of quality and attention to detail that I experienced here. Highly recommended!</p>
                    <div class="client-info">
                        <img src="https://randomuser.me/api/portraits/men/45.jpg" alt="Client" class="client-img">
                        <div class="client-details">
                            <h4 class="client-name">Michael Chen</h4>
                            <p class="client-role">Marketing Director, BrandWorks</p>
                            <div class="rating">
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star-half-alt"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            
            <div class="testimonial-slide">
                <div class="testimonial-card">
                    <div class="quote-icon"><i class="fas fa-quote-left"></i></div>
                    <p class="testimonial-text">The customer support is exceptional. They went above and beyond to ensure we were satisfied with the product. Will definitely be using their services again.</p>
                    <div class="client-info">
                        <img src="https://randomuser.me/api/portraits/women/68.jpg" alt="Client" class="client-img">
                        <div class="client-details">
                            <h4 class="client-name">Emily Rodriguez</h4>
                            <p class="client-role">Founder, DesignHub</p>
                            <div class="rating">
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                                <i class="fas fa-star"></i>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        
        <div class="carousel-controls">
            <button class="mui-btn prev-btn" aria-label="Previous testimonial">
                <i class="fas fa-chevron-left"></i>
            </button>
            <div class="indicators">
                <span class="indicator active"></span>
                <span class="indicator"></span>
                <span class="indicator"></span>
            </div>
            <button class="mui-btn next-btn" aria-label="Next testimonial">
                <i class="fas fa-chevron-right"></i>
            </button>
        </div>
    </div>
    
    <script src="script.js"></script>
</body>
</html>





Step 3: JavaScript Functionality (Making It Work)

 

Now comes the interactive part — the JavaScript.

 

This script runs once the page loads, and it makes everything behave properly.

 

Here's what it does, step by step:

 

  • Sets up the slides: It finds all the testimonial slides and dots.
  • Starts with the first slide active: When you load the page, only the first testimonial is visible.
  • Slide navigation:
    • If you click the right arrow, it shows the next testimonial.
    • If you click the left arrow, it shows the previous one.
  • Looping: Once you get to the end, it starts again from the beginning. It's like a loop.
  • Keyboard shortcuts:
    • Press the right arrow key → next testimonial.
    • Press the left arrow key ← previous testimonial.
  • Clicking the dots:
    • You can also click a dot to go directly to that testimonial.

 

There's also a nice touch:

 

The slides move automatically every 8 seconds — like a slideshow on autoplay. But when you hover your mouse over it, it pauses. When your mouse leaves, it resumes. This gives users time to read without rushing.



Script.js




  document.addEventListener('DOMContentLoaded', function() {
    const slides = document.querySelectorAll('.testimonial-slide');
    const indicators = document.querySelectorAll('.indicator');
    const prevBtn = document.querySelector('.prev-btn');
    const nextBtn = document.querySelector('.next-btn');
    let currentSlide = 0;
    const slideCount = slides.length;
    
    // Initialize carousel
    function initCarousel() {
        slides.forEach((slide, index) => {
            if (index === 0) {
                slide.classList.add('active');
            } else {
                slide.classList.remove('active');
            }
        });
        
        indicators.forEach((indicator, index) => {
            if (index === 0) {
                indicator.classList.add('active');
            } else {
                indicator.classList.remove('active');
            }
        });
    }
    
    // Go to specific slide
    function goToSlide(n) {
        slides[currentSlide].classList.remove('active');
        indicators[currentSlide].classList.remove('active');
        
        currentSlide = (n + slideCount) % slideCount;
        
        slides[currentSlide].classList.add('active');
        indicators[currentSlide].classList.add('active');
    }
    
    // Next slide
    function nextSlide() {
        goToSlide(currentSlide + 1);
    }
    
    // Previous slide
    function prevSlide() {
        goToSlide(currentSlide - 1);
    }
    
    // Event listeners
    nextBtn.addEventListener('click', nextSlide);
    prevBtn.addEventListener('click', prevSlide);
    
    // Keyboard navigation
    document.addEventListener('keydown', function(e) {
        if (e.key === 'ArrowRight') {
            nextSlide();
        } else if (e.key === 'ArrowLeft') {
            prevSlide();
        }
    });
    
    // Indicator click events
    indicators.forEach((indicator, index) => {
        indicator.addEventListener('click', () => {
            goToSlide(index);
        });
    });
    
    // Auto-rotate slides (optional)
    let slideInterval = setInterval(nextSlide, 8000);
    
    // Pause on hover
    const carousel = document.querySelector('.testimonial-carousel');
    carousel.addEventListener('mouseenter', () => {
        clearInterval(slideInterval);
    });
    
    carousel.addEventListener('mouseleave', () => {
        slideInterval = setInterval(nextSlide, 8000);
    });
    
    // Initialize
    initCarousel();
    
    // Add animation to cards when they become active
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.style.opacity = 1;
                entry.target.style.transform = 'translateY(0)';
            }
        });
    }, { threshold: 0.1 });
    
    document.querySelectorAll('.testimonial-card').forEach(card => {
        card.style.opacity = 0;
        card.style.transform = 'translateY(20px)';
        card.style.transition = 'opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), transform 0.4s cubic-bezier(0.4, 0, 0.2, 1)';
        observer.observe(card);
    });
});
  
  





Step 4: Smooth Animations

 

There's a small animation added. When a testimonial becomes visible, it fades in and slightly slides up into place. This is done using a thing called Intersection Observer. It detects when something comes into view and then makes it animate.

 

It's subtle, but it adds a polished feeling.






Why Use a Testimonial Carousel?

 

If you're wondering why someone would go through all this effort, here's why:

 

  • Customer reviews build trust.
  • Instead of showing all reviews at once (which can take up space), this carousel displays them one at a time.
  • It looks clean, organized, and interactive — a great impression for visitors.

Summary of the Key Features

 

  • HTML sets up the structure — headings, images, buttons, etc.
  • CSS controls the look and feel — colors, fonts, spacing.
  • JavaScript adds interactivity — sliding between testimonials, autoplay, pause on hover, animations.

 

This combination gives you a professional testimonial section that's easy for users to explore.






Ideas to Make It Your Own

 

If you're building this for yourself or your own website, you could:

 

  • Add more testimonials.
  • Use your real customer photos.
  • Change the star ratings.
  • Adjust the timing (e.g., autoplay every 5 seconds instead of 8).
  • Use different icons or font styles to match your brand.





Final Thoughts

 

This code builds a modern, responsive section where users can read through customer reviews one by one. It works on phones and computers, lets users navigate easily, and even adds nice animations. It's a small detail that makes a big difference in how professional your website looks.

 

And the best part? You don't need to start from scratch. You can take this code, tweak it a bit, and make it suit your style.

 

Hope that explanation helped! If you want, I can walk you through how to change the design or even how to connect it to real data later on. 😊

 

chandrakumar

Hi, Am Chandra Kumar, I have completed my graduation in B.E computer science and Engineering. I am the founder of Dailyaspirants and I have been doing blogging and website design and development .since 2018 and 5+experience gained in this field.

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