Web Front-end
JS Tutorial
How to use JavaScript bubbling events to achieve multi-level interaction: build complex interactive experiences
How to use JavaScript bubbling events to achieve multi-level interaction: build complex interactive experiences
How to use JavaScript bubbling events to achieve multi-level interaction: building complex interactive experiences requires specific code examples
In modern web applications, interactive experience is a very Important factor. In order to achieve complex interactive effects, we need to use JavaScript to handle various user events. Among them, the use of bubbling events can effectively achieve multi-level interaction, allowing page elements to communicate and respond to each other.
Bubbling event refers to the process in which an event is propagated upward from the triggered element to the top-level document node in the DOM tree. When an element triggers an event, such as a click event, if the event handler is bound to the element, the function will be executed; at the same time, the event will continue to be passed to the parent element to check again whether there is The element to which this event handler function is bound is executed, if any. This process will continue to the root node until all elements have been checked.
The following is a specific example showing how to use bubbling events to achieve multi-level interaction:
<!DOCTYPE html>
<html>
<head>
<title>多层级交互示例</title>
<style>
.box {
width: 300px;
height: 200px;
background-color: #e1e1e1;
padding: 20px;
margin: 20px;
text-align: center;
}
</style>
</head>
<body>
<div class="box" id="box1">
<div class="box" id="box2">
<div class="box" id="box3">
<button id="btn">点击我</button>
</div>
</div>
</div>
<script>
// 获取按钮元素
var btn = document.getElementById('btn');
// 给按钮绑定click事件处理函数
btn.addEventListener('click', function(event) {
// 阻止事件冒泡，即禁止事件向父级元素传递
event.stopPropagation();
// 执行按钮点击后的操作
alert('按钮被点击了！');
});
// 获取所有的.box元素
var boxes = document.getElementsByClassName('box');
// 遍历所有的.box元素，给它们绑定click事件处理函数
Array.from(boxes).forEach(function(box) {
box.addEventListener('click', function() {
// 获取被点击的.box元素的id
var boxId = this.id;
// 执行对应的操作
alert('我是' + boxId);
});
});
</script>
</body>
</html>In the above code, we created three div elements with the same class, which are nested within each other. Each div element has an id, which makes it easier for us to distinguish them in the event handler function. At the same time, we have a button element nested in the innermost div element.
We first bind a click event handler to the button element. In this function, we call the stopPropagation() method of the event object to prevent the event from bubbling. The purpose of this is that when the button is clicked, only the click event handler of the button will be executed, and the click event handler of the parent element will not be executed.
Next, we use the addEventListener method to bind a click event handler to all elements with the .box class name. In this function, we first obtain the id of the clicked element and perform different operations based on the id. In this example, we simply pop up a dialog box showing the id of the clicked element.
In this way, we can achieve multi-level interactive effects. When the user clicks a button, only the click event handler of the button will be triggered; when the user clicks on an element other than the button, the click event handler of the corresponding element and its parent element will be triggered, thus achieving multi-level interaction. .
Therefore, using JavaScript bubbling events can easily build complex interactive experiences. By controlling the bubbling of events and preventing them from bubbling, we can flexibly handle user operations to achieve rich and diverse interactive effects. I hope the sample code provided in this article can help readers better understand and apply bubbling events.
The above is the detailed content of How to use JavaScript bubbling events to achieve multi-level interaction: build complex interactive experiences. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1390
52
Develop powerful desktop applications with Golang
Mar 19, 2024 pm 05:45 PM
Use Golang to develop powerful desktop applications. With the continuous development of the Internet, people have become inseparable from various types of desktop applications. For developers, it is crucial to use efficient programming languages to develop powerful desktop applications. This article will introduce how to use Golang (Go language) to develop powerful desktop applications and provide some specific code examples. Golang is an open source programming language developed by Google. It has the characteristics of simplicity, efficiency, strong concurrency, etc., and is very suitable for
How to set up jump on layui login page
Apr 04, 2024 am 03:12 AM
Layui login page jump setting steps: Add jump code: Add judgment in the login form submit button click event, and jump to the specified page through window.location.href after successful login. Modify the form configuration: add a hidden input field to the form element of lay-filter="login", with the name "redirect" and the value being the target page address.
How to add touch events to pictures in vue
May 02, 2024 pm 10:21 PM
How to add click event to image in Vue? Import the Vue instance. Create a Vue instance. Add images to HTML templates. Add click events using the v-on:click directive. Define the handleClick method in the Vue instance.
Hongmeng HarmonyOS and Go language development
Apr 08, 2024 pm 04:48 PM
Introduction to HarmonyOS and Go language development HarmonyOS is a distributed operating system developed by Huawei, and Go is a modern programming language. The combination of the two provides a powerful solution for developing distributed applications. This article will introduce how to use Go language for development in HarmonyOS, and deepen understanding through practical cases. Installation and Setup To use Go language to develop HarmonyOS applications, you need to install GoSDK and HarmonyOSSDK first. The specific steps are as follows: #Install GoSDKgogetgithub.com/golang/go#Set PATH
PHP Tips: Quickly Implement Return to Previous Page Function
Mar 09, 2024 am 08:21 AM
PHP Tips: Quickly implement the function of returning to the previous page. In web development, we often encounter the need to implement the function of returning to the previous page. Such operations can improve the user experience and make it easier for users to navigate between web pages. In PHP, we can achieve this function through some simple code. This article will introduce how to quickly implement the function of returning to the previous page and provide specific PHP code examples. In PHP, we can use $_SERVER['HTTP_REFERER'] to get the URL of the previous page
What is the event-driven mechanism of C++ functions in concurrent programming?
Apr 26, 2024 pm 02:15 PM
The event-driven mechanism in concurrent programming responds to external events by executing callback functions when events occur. In C++, the event-driven mechanism can be implemented with function pointers: function pointers can register callback functions to be executed when events occur. Lambda expressions can also implement event callbacks, allowing the creation of anonymous function objects. The actual case uses function pointers to implement GUI button click events, calling the callback function and printing messages when the event occurs.
Detailed explanation of JavaScript obtaining web page elements
Apr 09, 2024 pm 12:45 PM
Answer: JavaScript provides a variety of methods for obtaining web page elements, including using ids, tag names, class names, and CSS selectors. Detailed description: getElementById(id): Get elements based on unique id. getElementsByTagName(tag): Gets the element group with the specified tag name. getElementsByClassName(class): Gets the element group with the specified class name. querySelector(selector): Use CSS selector to get the first matching element. querySelectorAll(selector): Get all matches using CSS selector
Conquer the GUI world with Python Tkinter: The complete guide
Mar 24, 2024 am 09:26 AM
Tkinter is a powerful GUI toolkit in the Python standard library for creating cross-platform graphical user interfaces (GUIs). It is based on the Tcl/Tk toolkit and provides simple and intuitive syntax, allowing Python developers to create complex user interfaces easily and quickly. Advantages of Tkinter Cross-platform compatibility: Tkinter applications run on all major operating systems such as windows, Mac and Linux. Easy to use: Its syntax is clear and easy to learn, making it easy for both beginners and experienced developers to master. Extensibility: Tkinter provides a variety of widgets and controls, enabling developers to create a wide variety of user interfaces. Integration: It is related to P
