This post showcases excellent jQuery plugins for gracefully preloading images on your website. Let's dive in!
Related Articles:
- jQuery Preloading External Images
- jQuery Preload CSS Images
- 10 jQuery Image Cache Plugins and Scripts
Updated 21/06/2013: Added PreloadJS, ImageLoader, PxLoader, UXResponsiveWebAppLoader. Updated 21/06/2013: A tutorial on preloading web app images is now available.
PreloadJS
A JavaScript library for managing and coordinating asset loading.
ImageLoader
A jQuery plugin designed for preloading images.
PxLoader
A JavaScript preloader tailored for HTML5 applications.
UXResponsiveWebAppLoader
A responsive web app-like preloader leveraging jQuery and CSS3.
And now, the original top 10!
1. jQuery Image Loader Plugin
Simplifies image loading, easily applied to wrappers for loading all contained images. Aids in UI enhancement.
2. QueryLoader2
Effortless image preloading.
3. Smart Preloader
A compact jQuery plugin for preloading all necessary images.
4. jQuery Preload Plugin
Useful for adding images via AJAX calls.
5. jQuery Cycle Plugin
A slideshow plugin with various transition effects, supporting pause-on-hover, auto-stop, and more.
6. Lazy Load Images jQuery Plugin
Delays image loading in long pages, loading images only when scrolled into view (opposite of preloading).
7. jPreLoader
Creates a customizable preloading screen with a splash screen.
8. JavaScript and HTML5 Progress Bar Image Loader
Displays a progress bar indicating page load time.
9. jQuery Image Cache Plugin
Caches images in the browser's local storage.
Frequently Asked Questions (FAQ) (This section remains largely unchanged as it's already well-written and doesn't require significant paraphrasing.)
What is the purpose of preloading images with plugins?
Preloading images with plugins enhances website user experience. Preloaded images display faster, reducing page load times and creating a smoother browsing experience. This is particularly beneficial for image-heavy sites.
How does image preloading work?
Image preloading loads images into the browser's cache beforehand using JavaScript or jQuery plugins. When the user accesses the page, the browser retrieves them from the cache, speeding up loading.
What are the benefits of using jQuery for image preloading?
jQuery simplifies image preloading, making code cleaner and easier to read. It offers features like callback functions for when images finish loading.
How can I preload images with pure JavaScript?
Pure JavaScript preloading involves creating Image
objects and setting their src
attributes to image URLs. This triggers the browser to download and cache the images. Example:
var img1 = new Image(); img1.src = "image1.jpg"; var img2 = new Image(); img2.src = "image2.jpg";
Can I use CSS to preload images?
Yes, using the background-image
property. However, this lacks the flexibility of JavaScript or jQuery, such as callback functions.
Are there any downsides to preloading images?
Preloading can increase initial load times and bandwidth usage.
How can I ensure that my preloaded images are displayed correctly?
Specify correct image dimensions in your CSS or HTML to prevent page reflow and flickering.
Can I preload images for a slideshow or gallery?
Yes, preloading is highly beneficial for slideshows and galleries for seamless transitions.
What is the difference between preloading and lazy loading images?
Preloading loads images upfront; lazy loading loads them only when they're about to be visible.
Can I use image preloading for responsive web design?
Yes, but only preload images needed for the current screen size to avoid wasted bandwidth.
Remember to replace https://www.php.cn/link/874dc8c9cd9006d9aaca0cb5ac550812
and https://www.php.cn/link/e1dd47cc816ac88ccd8100451384c97a
with the actual links.
The above is the detailed content of 10 jQuery Preload Image Plugins. For more information, please follow other related articles on the PHP Chinese website!

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.

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C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

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.


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