How to use JavaScript to achieve image lightbox effect?-JS Tutorial-php.cn

Home

Web Front-end

JS Tutorial

How to use JavaScript to achieve image lightbox effect?

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Oct 18, 2023 am 11:15 AM

javascriptImplementationImage lightbox

如何使用 JavaScript 实现图片灯箱效果？

How to use JavaScript to achieve the image lightbox effect?

With the development of social media and web design, the picture lightbox effect has become one of the common interactive special effects in many websites. Image lightbox is an effect that displays an enlarged image in the center of the screen by clicking on it. It not only improves the user experience, but also better displays the details of the image. In this article, we will learn how to use JavaScript to implement a simple image lightbox effect.

First, we need an HTML page to display images. Below is a basic HTML structure.

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>图片灯箱</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="container">
        <img class="lightbox lazy"  src="/static/imghwm/default1.png"  data-src="image1.jpg"  alt="Image 1">
        <img class="lightbox lazy"  src="/static/imghwm/default1.png"  data-src="image2.jpg"  alt="Image 2">
        <img class="lightbox lazy"  src="/static/imghwm/default1.png"  data-src="image3.jpg"  alt="Image 3">
    </div>

    <div id="lightbox" class="hidden">
        <img src="/static/imghwm/default1.png"  data-src="script.js"  class="lazy" alt="Lightbox Image" id="lightbox-image">
        <span id="close-button">X</span>
    </div>

    <script></script>
</body>
</html>

In the above code, we created a container containing three pictures and added a class of "lightbox" to each picture. We also create a hidden div to display the enlarged image, with the id "lightbox". In this div, we added an empty image and a close button.

Next, we need to create some CSS styles to achieve the effect of the image lightbox. Create a file named style.css and add the following styles:

.container {
    display: flex;
}

.lightbox {
    cursor: pointer;
    width: 200px;
    height: 200px;
}

#lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
    z-index: 9999;
}

#lightbox img {
    width: 80%;
    max-height: 80%;
    margin-bottom: 20px;
}

#close-button {
    color: #fff;
    font-size: 30px;
    cursor: pointer;
}

In the above CSS style, we set the style of the container and image so that they can be displayed in the form of a grid on the page . We also define a style called "lightbox" that is used to adjust the layout and background color when the image is enlarged. Finally, we set the style for the enlarged image and the style for the close button.

Now, we can start writing JavaScript code. Create a file named script.js in the same directory as the HTML file and add the following code:

// 获取所有的图片元素
var lightboxImages = document.getElementsByClassName("lightbox");

// 获取放大图片和关闭按钮元素
var lightbox = document.getElementById("lightbox");
var lightboxImage = document.getElementById("lightbox-image");
var closeButton = document.getElementById("close-button");

// 绑定点击事件，显示放大图片
for (var i = 0; i < lightboxImages.length; i++) {
    lightboxImages[i].addEventListener("click", function() {
        var imageSource = this.getAttribute("src");
        lightboxImage.setAttribute("src", imageSource);
        lightbox.classList.remove("hidden");
    });
}

// 绑定点击事件，隐藏放大图片
closeButton.addEventListener("click", function() {
    lightbox.classList.add("hidden");
});

In the above JavaScript code, we first get all the files through the getElementsByClassName method Image element with "lightbox" class. Next, we get the elements for the zoom image and the close button. Then, we use a loop to bind a click event to each image. When the user clicks on the image, the source address of the image is set to the address of the enlarged image, and the hidden style of the enlarged image is removed. Finally, we bind the click event of the close button and add a hidden style to enlarge the image when the user clicks the close button.

Now, we can open the HTML file in the browser, click on the image, and see the effect of the image being enlarged and displayed in the center of the page. When the close button is clicked, the enlarged image will be hidden.

The above is the sample code for using JavaScript to achieve the image lightbox effect. You can modify and expand it according to your needs to create more complex and diverse picture lightbox effects. I wish you success in achieving this!

The above is the detailed content of How to use JavaScript to achieve image lightbox effect?. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Python vs. JavaScript: The Learning Curve and Ease of UseApr 16, 2025 am 12:12 AM

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python vs. JavaScript: Community, Libraries, and ResourcesApr 15, 2025 am 12:16 AM

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

From C/C to JavaScript: How It All WorksApr 14, 2025 am 12:05 AM

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

JavaScript Engines: Comparing ImplementationsApr 13, 2025 am 12:05 AM

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

Beyond the Browser: JavaScript in the Real WorldApr 12, 2025 am 12:06 AM

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

Building a Multi-Tenant SaaS Application with Next.js (Backend Integration)Apr 11, 2025 am 08:23 AM

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration)Apr 11, 2025 am 08:22 AM

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base

JavaScript: Exploring the Versatility of a Web LanguageApr 11, 2025 am 12:01 AM

JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.

See all articles