


How to use jQuery to control div blocks to move up, down, left, and right through arrow keys
This time I will show you how to use jQuery to control the div block to move up, down, left, and right through the arrow keys, and how to use jQuery to control the div block to move up, down, left, and right through the arrow keys. Precautions What are they? Here are actual cases. Let’s take a look.
In CSS, when the <a href="http://www.php.cn/wiki/902.html" target="_blank">position</a>
attribute of the DOM element is absolute or relative, we can change this The specific values of the left and top attributes of the element control the position where the element appears on the page.
Using the above attributes, we can simply realize the movement effect of an element on the page. Here we use JQuery's animate
method to achieve the animation effect and use keydown
to monitor The event of pressing the direction key ( uses keydown instead of keyup here so that the element can keep moving while the direction key is pressed. Keydown listens for the press event, and keyup listens for the key release event.) . Here we can also take advantage of a feature of the animate
method, which is that when the value of its attribute is '=' or '-=', it will first calculate based on the original value and then assign it to the corresponding Attribute, this is consistent with C's operator.
The core code is as follows:
$(document).keydown(function(event){ var keyNum = event.which; //获取键值 var Item = $('#switcher'); //要移动的元素 Item.css({position:'relative'}); //设置position switch(keyNum){ //判断按键 case 37: Item.animate({left:'-=20px'});break; case 38: Item.animate({top:'-=20px'});break; case 39: Item.animate({left:'+=20px'});break; case 40: Item.animate({top:'+=20px'});break; default: break; } });
The complete sample code is as follows:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>jQuery控制p移动</title> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> </head> <body> <p id="switcher" style="width:200px;height:200px;border:solid 1px #000;"> </p> <script> $(document).keydown(function(event){ var keyNum = event.which; //获取键值 var Item = $('#switcher'); //要移动的元素 Item.css({position:'relative'}); //设置position switch(keyNum){ //判断按键 case 37: Item.animate({left:'-=20px'});break; case 38: Item.animate({top:'-=20px'});break; case 39: Item.animate({left:'+=20px'});break; case 40: Item.animate({top:'+=20px'});break; default: break; } }); </script> </body> </html>
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to the php Chinese website Other related articles!
Recommended reading:
How to use Vue to achieve drag and drop effect
The above is the detailed content of How to use jQuery to control div blocks to move up, down, left, and right through arrow keys. 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

How to implement dual WeChat login on Huawei mobile phones? With the rise of social media, WeChat has become one of the indispensable communication tools in people's daily lives. However, many people may encounter a problem: logging into multiple WeChat accounts at the same time on the same mobile phone. For Huawei mobile phone users, it is not difficult to achieve dual WeChat login. This article will introduce how to achieve dual WeChat login on Huawei mobile phones. First of all, the EMUI system that comes with Huawei mobile phones provides a very convenient function - dual application opening. Through the application dual opening function, users can simultaneously

The programming language PHP is a powerful tool for web development, capable of supporting a variety of different programming logics and algorithms. Among them, implementing the Fibonacci sequence is a common and classic programming problem. In this article, we will introduce how to use the PHP programming language to implement the Fibonacci sequence, and attach specific code examples. The Fibonacci sequence is a mathematical sequence defined as follows: the first and second elements of the sequence are 1, and starting from the third element, the value of each element is equal to the sum of the previous two elements. The first few elements of the sequence

How to implement the WeChat clone function on Huawei mobile phones With the popularity of social software and people's increasing emphasis on privacy and security, the WeChat clone function has gradually become the focus of people's attention. The WeChat clone function can help users log in to multiple WeChat accounts on the same mobile phone at the same time, making it easier to manage and use. It is not difficult to implement the WeChat clone function on Huawei mobile phones. You only need to follow the following steps. Step 1: Make sure that the mobile phone system version and WeChat version meet the requirements. First, make sure that your Huawei mobile phone system version has been updated to the latest version, as well as the WeChat App.

In today's software development field, Golang (Go language), as an efficient, concise and highly concurrency programming language, is increasingly favored by developers. Its rich standard library and efficient concurrency features make it a high-profile choice in the field of game development. This article will explore how to use Golang for game development and demonstrate its powerful possibilities through specific code examples. 1. Golang’s advantages in game development. As a statically typed language, Golang is used in building large-scale game systems.

PHP Game Requirements Implementation Guide With the popularity and development of the Internet, the web game market is becoming more and more popular. Many developers hope to use the PHP language to develop their own web games, and implementing game requirements is a key step. This article will introduce how to use PHP language to implement common game requirements and provide specific code examples. 1. Create game characters In web games, game characters are a very important element. We need to define the attributes of the game character, such as name, level, experience value, etc., and provide methods to operate these

Title: jQuery Tips: Quickly modify the text of all a tags on the page In web development, we often need to modify and operate elements on the page. When using jQuery, sometimes you need to modify the text content of all a tags in the page at once, which can save time and energy. The following will introduce how to use jQuery to quickly modify the text of all a tags on the page, and give specific code examples. First, we need to introduce the jQuery library file and ensure that the following code is introduced into the page: <

Title: Use jQuery to modify the text content of all a tags. jQuery is a popular JavaScript library that is widely used to handle DOM operations. In web development, we often encounter the need to modify the text content of the link tag (a tag) on the page. This article will explain how to use jQuery to achieve this goal, and provide specific code examples. First, we need to introduce the jQuery library into the page. Add the following code in the HTML file:

I'm really sorry that I can't provide real-time programming guidance, but I can provide you with a code example to give you a better understanding of how to use PHP to implement SaaS. The following is an article within 1,500 words, titled "Using PHP to implement SaaS: A comprehensive analysis." In today's information age, SaaS (Software as a Service) has become the mainstream way for enterprises and individuals to use software. It provides a more flexible and convenient way to access software. With SaaS, users don’t need to be on-premises
