Learn how to create a portfolio gallery with filtering” with HTML, CSS, and JavaScript
HTML Code (index.html):
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="description" content="Learn how to create an interactive portfolio gallery with filtering options using HTML, CSS, and JavaScript. Display and categorize your images for a more organized user experience.">
    <meta name="keywords" content="portfolio gallery, image filtering, interactive web design, HTML CSS JavaScript, portfolio tutorial, web development, responsive gallery, image filter, portfolio website, web design techniques">
    <meta name="author" content="Your Name">
    <meta property="og:title" content="Create a Portfolio Gallery with Filtering in HTML & CSS">
    <meta property="og:description" content="Create an interactive portfolio gallery with filtering options using HTML, CSS, and JavaScript. Learn how to categorize images and enhance the user experience on your portfolio website.">
    <meta property="og:image" content="image.jpg">
    <meta property="og:url" content="yourwebsite.com">
    <meta name="twitter:title" content="Create a Portfolio Gallery with Filtering in HTML & CSS">
    <meta name="twitter:description" content="Build a professional portfolio gallery with filtering options using HTML, CSS, and JavaScript. Organize and showcase your work effectively.">
    <meta name="twitter:image" content="image.jpg">
    <meta name="twitter:card" content="summary_large_image">
    <title>Create a Portfolio Gallery with Filtering in HTML & CSS</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
<!-- MAIN (Center website) -->
<div class="main">
    <h1>MYLOGO.COM</h1>
    <hr>
    <h2>PORTFOLIO</h2>
    <div id="myBtnContainer">
        <button class="btn active" onclick="filterSelection('all')"> Show all</button>
        <button class="btn" onclick="filterSelection('nature')"> Nature</button>
        <button class="btn" onclick="filterSelection('cars')"> Cars</button>
        <button class="btn" onclick="filterSelection('people')"> People</button>
    </div>
    <!-- Portfolio Gallery Grid -->
    <div class="row">
        <div class="column nature">
            <div class="content">
                <img src="/w3images/mountains.jpg" alt="Mountains" style="width:100%">
                <h4>Mountains</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column nature">
            <div class="content">
                <img src="/w3images/lights.jpg" alt="Lights" style="width:100%">
                <h4>Lights</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column nature">
            <div class="content">
                <img src="/w3images/nature.jpg" alt="Nature" style="width:100%">
                <h4>Forest</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column cars">
            <div class="content">
                <img src="/w3images/cars1.jpg" alt="Car" style="width:100%">
                <h4>Retro</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column cars">
            <div class="content">
                <img src="/w3images/cars2.jpg" alt="Car" style="width:100%">
                <h4>Fast</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column cars">
            <div class="content">
                <img src="/w3images/cars3.jpg" alt="Car" style="width:100%">
                <h4>Classic</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column people">
            <div class="content">
                <img src="/w3images/people1.jpg" alt="Car" style="width:100%">
                <h4>Girl</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column people">
            <div class="content">
                <img src="/w3images/people2.jpg" alt="Car" style="width:100%">
                <h4>Man</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
        <div class="column people">
            <div class="content">
                <img src="/w3images/people3.jpg" alt="Car" style="width:100%">
                <h4>Woman</h4>
                <p>Lorem ipsum dolor..</p>
            </div>
        </div>
    </div>
</div>
<script>
filterSelection("all")
function filterSelection(c) {
    var x, i;
    x = document.getElementsByClassName("column");
    if (c == "all") c = "";
    for (i = 0; i < x.length; i++) {
        w3RemoveClass(x[i], "show");
        if (x[i].className.indexOf(c) > -1) w3AddClass(x[i], "show");
    }
}
function w3AddClass(element, name) {
    var i, arr1, arr2;
    arr1 = element.className.split(" ");
    arr2 = name.split(" ");
    for (i = 0; i < arr2.length; i++) {
        if (arr1.indexOf(arr2[i]) == -1) {element.className += " " + arr2[i];}
    }
}
function w3RemoveClass(element, name) {
    var i, arr1, arr2;
    arr1 = element.className.split(" ");
    arr2 = name.split(" ");
    for (i = 0; i < arr2.length; i++) {
        while (arr1.indexOf(arr2[i]) > -1) {
            arr1.splice(arr1.indexOf(arr2[i]), 1);     
        }
    }
    element.className = arr1.join(" ");
}
var btnContainer = document.getElementById("myBtnContainer");
var btns = btnContainer.getElementsByClassName("btn");
for (var i = 0; i < btns.length; i++) {
    btns[i].addEventListener("click", function(){
        var current = document.getElementsByClassName("active");
        current[0].className = current[0].className.replace(" active", "");
        this.className += " active";
    });
}
</script>
</body>
</html>
CSS Code (style.css):
* {
    box-sizing: border-box;
}
body {
    background-color: #f1f1f1;
    padding: 20px;
    font-family: Arial;
}
/* Center website */
.main {
    max-width: 1000px;
    margin: auto;
}
h1 {
    font-size: 50px;
    word-break: break-all;
}
.row {
    margin: 10px -16px;
}
/* Add padding BETWEEN each column */
.row,
.row > .column {
    padding: 8px;
}
/* Create three equal columns that floats next to each other */
.column {
    float: left;
    width: 33.33%;
    display: none; /* Hide all elements by default */
}
/* Clear floats after rows */ 
.row:after {
    content: "";
    display: table;
    clear: both;
}
/* Content */
.content {
    background-color: white;
    padding: 10px;
}
/* The "show" class is added to the filtered elements */
.show {
    display: block;
}
/* Style the buttons */
.btn {
    border: none;
    outline: none;
    padding: 12px 16px;
    background-color: white;
    cursor: pointer;
}
.btn:hover {
    background-color: #ddd;
}
.btn.active {
    background-color: #666;
    color: white;
}
Explanation:
- 
HTML Structure:
- The HTML structure includes a header (
h1) and buttons to filter images by category (nature, cars, people, all). - The images are organized in a grid with each image belonging to a category (such as 
nature,cars,people). 
 - The HTML structure includes a header (
 - 
CSS Styling:
- The CSS styles define the layout and make the gallery responsive. It uses grid-like columns (
.column) to display images and apply filtering through JavaScript. 
 - The CSS styles define the layout and make the gallery responsive. It uses grid-like columns (
 - 
JavaScript Filtering:
- The JavaScript provides the filtering functionality. It uses the 
filterSelectionfunction to display images by their category when the corresponding button is clicked. - The 
showclass is added to the elements that match the selected filter, making them visible. 
 - The JavaScript provides the filtering functionality. It uses the 
 - 
SEO Optimization:
- The meta title and description provide clear and concise information about the page’s content.
 - Keywords like “portfolio gallery,” “image filtering,” and “interactive web design” are included to help search engines index the page effectively.