This article mainly introduces the animate() animation example of jQuery implemented in native JS. The editor thinks it is quite good, so I will share it with you now and give it as a reference. Let’s follow the editor to take a look, I hope it can help everyone.
Parameter introduction:
obj |
Elements to perform animation |
css | JSON value pair, in the form of "{attribute name: attribute value}", refers to the book sequence to be animated and its corresponding value |
interval |
The time interval for each property change |
speedFactor | The speed factor makes the animation have a buffering effect , instead of constant speed (speedFactor is 1) |
func | Callback function after executing the animation |
Note:
A timer must be added to each element, otherwise it will affect each other.
cur != css[arr] Determine whether each attribute has reached the target value. The timer will be cleared only when all attributes reach the target value. The function of the flag is to prevent the timer from being cleared when a certain attribute is the first to reach the target value but there are other attributes that have not reached the target value. Therefore, initialize the flag to true before each change. As soon as you encounter an attribute that does not reach the target, set the flag to false. The timer will not be cleared until all attributes reach the target value.
The value of the attribute value opacity has decimals, so special processing is required: Math.ceil(speed) and Math.floor(speed) as well as * 100 and / 100 operations.
function animate(obj, css, interval, speedFactor, func) { clearInterval(obj.timer); function getCss(obj, prop) { if (obj.currentStyle) return obj.currentStyle[prop]; // ie else return document.defaultView.getComputedStyle(obj, null)[prop]; // 非ie } obj.timer = setInterval(function(){ var flag = true; for (var prop in css) { var cur = 0; if(prop == "opacity") cur = Math.round(parseFloat(getStyle(obj, prop)) * 100); else cur = parseInt(getStyle(obj, prop)); var speed = (css[prop] - cur) * speedFactor; speed = speed > 0 ? Math.ceil(speed): Math.floor(speed); if (cur != css[prop]) flag = false; if (prop == "opacity") { obj.style.filter = "alpha(opacity : '+(cur + speed)+' )"; obj.style.opacity = (cur + speed) / 100; } else obj.style[prop] = cur + speed + "px"; } if (flag) { clearInterval(obj.timer); if (func) func(); } }, interval); } var li = document.getElementsByTagName("li"); for(var i = 0; i < li.length; i ++){ li[i].onmouseover = function(){ animate(this, {width: 100, opacity: 0.5}, 10, 0.01, function(){ alert("Finished!"); }); } }
Related recommendations:
Jquery’s animate() response is too slow to solve the problem
In-depth understanding of jquery custom animation animate()
Usage examples of animate() method in jQuery_jquery
The above is the detailed content of JS implements jQuery's animate() animation. For more information, please follow other related articles on the PHP Chinese website!

JavaScript originated in 1995 and was created by Brandon Ike, and realized the language into C. 1.C language provides high performance and system-level programming capabilities for JavaScript. 2. JavaScript's memory management and performance optimization rely on C language. 3. The cross-platform feature of C language helps JavaScript run efficiently on different operating systems.

JavaScript runs in browsers and Node.js environments and relies on the JavaScript engine to parse and execute code. 1) Generate abstract syntax tree (AST) in the parsing stage; 2) convert AST into bytecode or machine code in the compilation stage; 3) execute the compiled code in the execution stage.

The future trends of Python and JavaScript include: 1. Python will consolidate its position in the fields of scientific computing and AI, 2. JavaScript will promote the development of web technology, 3. Cross-platform development will become a hot topic, and 4. Performance optimization will be the focus. Both will continue to expand application scenarios in their respective fields and make more breakthroughs in performance.

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.


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

Atom editor mac version download
The most popular open source editor

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

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

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Zend Studio 13.0.1
Powerful PHP integrated development environment
