jQuery is a very popular Javascript library that contains a large number of utility functions and methods that allow us to manipulate HTML and CSS elements more easily. In this article, we will introduce how to implement the sliding method using jQuery.
- Introduction
Sliding is a common user interaction action that allows users to drag elements on the page and may be needed in some situations. For example, in the carousel image, we hope that the user can switch to the next picture or the previous picture through gestures, so we need to implement a sliding method to achieve this.
- Gesture recognition
Before implementing the sliding method, we need to perform gesture recognition first to determine whether the user is sliding horizontally or vertically. In jQuery, we can use events such as mousedown, mousemove, and mouseup to implement gesture recognition. The specific code is as follows:
var startX, startY, endX, endY;
$(document).on('mousedown', function(e) {
startX = e.clientX;
startY = e.clientY;
});
$(document).on('mousemove', function(e) {
endX = e.clientX;
endY = e.clientY;
var direction = swipeDirection(startX, startY, endX, endY);
});
$(document).on('mouseup', function(e) {
endX = e.clientX;
endY = e.clientY;
var direction = swipeDirection(startX, startY, endX, endY);
});
function swipeDirection(startX, startY, endX, endY) {
var diffX = Math.abs(startX - endX);
var diffY = Math.abs(startY - endY);
if (diffX > diffY) {
return (startX > endX) ? 'left' : 'right';
} else {
return (startY > endY) ? 'up' : 'down';
}
} In the above code, we record the coordinates where the user starts to trigger the gesture through the mousedown event, and then record the user through the mousemove event For the coordinates at which the sliding ends, we can use the swipeDirection function to determine whether the user slid horizontally or vertically. Finally, we use the mouseup event to record the coordinates when the gesture ends.
- Implementing the sliding method
After performing gesture recognition, we can implement the sliding method. In the following example, we will use jQuery's animate method to implement a smooth sliding animation so that the image can follow the gesture when it is dragged.
<!DOCTYPE html>
<html>
<head>
<title>滑动方法示例</title>
</head>
<body>
<div style="width: 800px; height: 400px; overflow: hidden;">
<img src="/static/imghwm/default1.png" data-src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js" class="lazy" id="slider" style="max-width:90%" alt="jquery sliding method" >
</div>
</body>
<script></script>
<script>
var slider = $('#slider');
var currentPos = 0; //记录当前的位置
var sliderWidth = slider.width(); //获取图片宽度
var len = slider.children('img').length; //获取图片数量
//监听鼠标按下事件
slider.on('mousedown', function(e) {
var startX = e.pageX; //获取鼠标按下时的坐标
var left = parseFloat(slider.css('left')); //获取初始位置
var endX;
//监听鼠标移动事件
slider.on('mousemove', function(e) {
endX = e.pageX; //获取鼠标移动时的坐标
slider.css('left', left + endX - startX); //设置图片位置
});
//监听鼠标松开事件
slider.on('mouseup', function(e) {
$(this).off('mousemove'); //取消鼠标移动事件的监听
var direction = swipeDirection(startX, 0, endX, 0); //判断手势方向
if (direction === 'left' && currentPos < len - 1) {
currentPos++; //向左滑动，图片位置加1
slider.animate({
left: '-=' + sliderWidth
});
} else if (direction === 'right' && currentPos > 0) {
currentPos--; //向右滑动，图片位置减1
slider.animate({
left: '+=' + sliderWidth
});
} else {
slider.animate({
left: '-=' + (endX - startX) //回到原来的位置
});
}
});
//阻止默认事件
e.preventDefault();
});
</script>
</html>In the above code, we first use the mousedown event to record the coordinates of the user when sliding the picture, and then use the mousemove event to continuously calculate that the picture should follow the finger The sliding distance, and finally the mouseup event is used to determine the direction of the user's sliding and perform a smooth sliding animation.
- Summary
This article introduces how to use jQuery to implement the sliding method. We first perform gesture recognition to determine whether the user is sliding horizontally or vertically, and then implement a smooth sliding animation based on the direction of the user's sliding. In this way, we can implement many customized user interaction effects in the page, giving users a better experience.
The above is the detailed content of jquery sliding method. For more information, please follow other related articles on the PHP Chinese website!
What is useEffect? How do you use it to perform side effects?Mar 19, 2025 pm 03:58 PMThe article discusses useEffect in React, a hook for managing side effects like data fetching and DOM manipulation in functional components. It explains usage, common side effects, and cleanup to prevent issues like memory leaks.
Explain the concept of lazy loading.Mar 13, 2025 pm 07:47 PMLazy loading delays loading of content until needed, improving web performance and user experience by reducing initial load times and server load.
How does currying work in JavaScript, and what are its benefits?Mar 18, 2025 pm 01:45 PMThe article discusses currying in JavaScript, a technique transforming multi-argument functions into single-argument function sequences. It explores currying's implementation, benefits like partial application, and practical uses, enhancing code read
What are higher-order functions in JavaScript, and how can they be used to write more concise and reusable code?Mar 18, 2025 pm 01:44 PMHigher-order functions in JavaScript enhance code conciseness, reusability, modularity, and performance through abstraction, common patterns, and optimization techniques.
How does the React reconciliation algorithm work?Mar 18, 2025 pm 01:58 PMThe article explains React's reconciliation algorithm, which efficiently updates the DOM by comparing Virtual DOM trees. It discusses performance benefits, optimization techniques, and impacts on user experience.Character count: 159
What is useContext? How do you use it to share state between components?Mar 19, 2025 pm 03:59 PMThe article explains useContext in React, which simplifies state management by avoiding prop drilling. It discusses benefits like centralized state and performance improvements through reduced re-renders.
How do you prevent default behavior in event handlers?Mar 19, 2025 pm 04:10 PMArticle discusses preventing default behavior in event handlers using preventDefault() method, its benefits like enhanced user experience, and potential issues like accessibility concerns.
What are Redux reducers? How do they update the state?Mar 21, 2025 pm 06:21 PMRedux reducers are pure functions that update the application's state based on actions, ensuring predictability and immutability.
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
SublimeText3 Mac version
God-level code editing software (SublimeText3)
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
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.
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
