


Should You Embed Images as Data/Base64 in CSS or HTML?
Embedding images as base64 data directly into CSS or HTML is a technique employed to minimize server requests. However, it raises concerns about its practicality and consequences.
Pros and Cons of Base64 Embedding
Embedding images as base64 offers certain advantages:
- Reduced server requests: Embedding multiple images as base64 data minimizes the number of requests made to the server.
- Improved performance: By eliminating additional HTTP requests, page load times can potentially improve.
However, this practice also comes with notable downsides:
- Limited browser support: IE6 and IE7 lack support for base64 URLs.
- Size limitations: IE8 supports data URLs up to 32k in size after base64 encoding (approximately 32768 characters).
- Bloated page size: Embedding images as base64 increases the size of the HTML page, as the image data is added to the code.
- Uncacheable images: Images embedded as base64 cannot be cached by the browser, which means they will be downloaded every time the page or CSS file is loaded.
- Increased server load: Base64-encoded images consume additional CPU resources during server processing, especially when served in gzipped resources.
Is Base64 Embedding a Good Practice?
The practice of embedding images as base64 data is generally recommended only for very small CSS images that will be used together, such as CSS sprites. This approach is suitable in situations where IE compatibility is not a concern, and saving the request is prioritized over cacheability.
Base64 Embedding for CSS and JS
Embedding CSS and JS files as base64 data follows similar principles. However, it presents additional challenges:
- Increased file size: CSS and JS files are typically larger than images, so base64 encoding them can significantly increase their size.
- Potential performance issues: Inlining CSS and JS files can negatively impact rendering performance on older browsers.
- Debugging difficulties: Base64-encoded CSS and JS can make debugging processes more challenging.
Overall, it is generally not recommended to embed CSS and JS files as base64 data unless there are specific requirements that warrant such a trade-off.
The above is the detailed content of To Base64 Encode Images in CSS/HTML or Not: When Is It a Good Practice?. For more information, please follow other related articles on the PHP Chinese website!

This is the 3rd post in a small series we did on form accessibility. If you missed the second post, check out "Managing User Focus with :focus-visible". In

This tutorial demonstrates creating professional-looking JavaScript forms using the Smart Forms framework (note: no longer available). While the framework itself is unavailable, the principles and techniques remain relevant for other form builders.

The CSS box-shadow and outline properties gained theme.json support in WordPress 6.1. Let's look at a few examples of how it works in real themes, and what options we have to apply these styles to WordPress blocks and elements.

Building an inline text editor isn't trivial. The process starts by making the target element editable, handling potential SyntaxError exceptions along the way. Creating Your Editor To build this editor, you'll need to dynamically modify the content

The Svelte transition API provides a way to animate components when they enter or leave the document, including custom Svelte transitions.

If you’ve recently started working with GraphQL, or reviewed its pros and cons, you’ve no doubt heard things like “GraphQL doesn’t support caching” or

This tutorial guides you through building a file upload system using Node.js, Express, and Multer. We'll cover single and multiple file uploads, and even demonstrate storing images in a MongoDB database for later retrieval. First, set up your projec

This article explores the top PHP form builder scripts available on Envato Market, comparing their features, flexibility, and design. Before diving into specific options, let's understand what a PHP form builder is and why you'd use one. A PHP form


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

Dreamweaver CS6
Visual web development tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

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),

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
