Optimal CSS Inclusion Practices: Understanding the Role of @import
When incorporating CSS stylesheets into existing HTML documents, the optimal approach is an ongoing debate. While the traditional method involves including an additional element, the @import rule offers an alternative solution. To delve into the purpose and advantages of using @import, let's explore the question: Does @import provide any benefits over simply adding another element?
Page Load Performance and Concurrency
From a performance perspective, @import in CSS should be employed with caution because it can obstruct the concurrent download of stylesheets. If a stylesheet X contains the following declaration:
@import url("stylesheetY.css");
The download of stylesheet Y may be delayed until stylesheet X has been completely downloaded. However, when both stylesheets are linked using elements in the HTML page, they can be retrieved simultaneously.
Consolidation vs. Separate Stylesheets
If both stylesheets are always loaded together, it may be advantageous to combine them into a singular file for increased efficiency. This approach eliminates the need for additional requests to the server.
Appropriate Use Cases for @import
Although @import has become less prevalent due to performance concerns, it does have occasional applications where it remains a suitable option. For instance, if you want to include specific CSS styles from an external file without affecting its overall structure, @import can be an efficient solution.
Best Practice Recommendations
For optimal page load speed, consider employing the following best practices:
- Avoid using @import unless there is a compelling reason.
- When necessary, use @import sparingly and only for including specific CSS sections from a remote file.
- Combine multiple stylesheets into a single file when possible to minimize HTTP requests.
The above is the detailed content of @import vs. : Does Using @import Offer Any Performance Advantages?. For more information, please follow other related articles on the PHP Chinese website!

If you've ever had to display an interactive animation during a live talk or a class, then you may know that it's not always easy to interact with your slides

With Astro, we can generate most of our site during our build, but have a small bit of server-side code that can handle search functionality using something like Fuse.js. In this demo, we’ll use Fuse to search through a set of personal “bookmarks” th

I wanted to implement a notification message in one of my projects, similar to what you’d see in Google Docs while a document is saving. In other words, a

Some months ago I was on Hacker News (as one does) and I ran across a (now deleted) article about not using if statements. If you’re new to this idea (like I

Since the early days of science fiction, we have fantasized about machines that talk to us. Today it is commonplace. Even so, the technology for making

I remember when Gutenberg was released into core, because I was at WordCamp US that day. A number of months have gone by now, so I imagine more and more of us

The idea behind most of web applications is to fetch data from the database and present it to the user in the best possible way. When we deal with data there

Let's do a little step-by-step of a situation where you can't quite do what seems to make sense, but you can still get it done with CSS trickery. In this


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 Mac version
God-level code editing software (SublimeText3)

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Atom editor mac version download
The most popular open source editor

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

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.