Detailed explanation of how to use jQuery.hover() function
The
hover() function is used to bind a handler function to the hover event of each matching element.
hover event is the mouse hover event. In addition, you can also pass some additional data to the Event Handling function.
In addition, you can call this function multiple times for the same element to bind multiple event handlers. When the hover event is triggered, jQuery will execute the bound event processing functions in the order of binding.
To delete an event bound via hover(), use the unbind() function.
This function belongs to the jQuery object (instance).
Syntax
hover() function mainly has the following two uses:
Usage 1:
jQueryObject.hover( handlerIn , handlerOut )
Variation of usage 1. When the event handler function is the same when the mouse moves into and out of an element, you only need to directly pass in a handler function as a parameter.
Parameters
Please find the corresponding parameters according to the parameter names defined in the previous syntax section.
#All parameters of the hover() function are functions, and this within the function points to the current DOM element. hover() also passes in a parameter: the Event object representing the current event.
Return value
hover()The return value of the function is of jQuery type and returns the current jQuery object itself.
Example & Description
hover() function and on() function have the following equivalent code:
$( selector ).hover( handlerInOut ); // 等价于 $( selector ).on( "mouseenter mouseleave", handlerInOut );
Please refer to the following initial HTML code:
<a id="a1" href="http://www.365mini.com">CodePlayer</a> <a id="a2" href="http://www.365mini.com/doc">中文手册</a>
Now, we bind handlers for the hover events of all a elements (you can bind multiple ones, and they will be executed in sequence in the binding order when triggered):
// 为所有button元素的hover事件绑定处理函数 // 鼠标移入链接时,显示红色;移出链接时,显示蓝色 $("a").hover( function(event){ $(this).css("color", "red"); }, function(event){ $(this).css("color", "blue"); } ); // 为所有button元素的hover事件绑定处理函数 // 鼠标移入、移出链接时,都去掉下划线 $("a").hover( function(event){ $(this).css("textDecoration", "none"); } );
The above is the detailed content of Detailed explanation of how to use jQuery.hover() function. For more information, please follow other related articles on the PHP Chinese website!

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

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 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.

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.

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.

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.


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

SublimeText3 English version
Recommended: Win version, supports code prompts!

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 Linux new version
SublimeText3 Linux latest version

Dreamweaver CS6
Visual web development tools