国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂

Table of Contents
Why is it more reasonable to put it in ?
Will putting it in affect the loading speed?
Are there any exceptions?
Home Web Front-end CSS Tutorial Why is it a best practice to put CSS tags in the ?

Why is it a best practice to put CSS tags in the ?

Jun 29, 2025 am 01:21 AM
css <head>

It is more reasonable to place the <link> tag of CSS in the

area of ??the HTML document, because the browser parses HTML from top to bottom, and puts CSS in will give it priority to download and parse, ensuring that the style is applied during page rendering and avoiding FOUC (no style content flash); although this will block page rendering, it provides a "delayed but stable" experience, which is better than displaying chaotic content first and then adjusting the layout; optimization methods include using media properties, compressing CSS, CDN acceleration, inline critical CSS, etc.; exceptions include asynchronous loading of non-critical CSS, dynamic skinning functions, and advanced means such as automatic loading of build tools in modern front-end frameworks.

Why is it a best practice to put CSS <link> tags in the <head>?

Putting the CSS <link> tag in the area of ??an HTML document is a widely recommended best practice. This is mainly done to ensure that the page can apply styles as soon as possible when loading, and improve user perceived performance and overall experience.

Why is it more reasonable to put it in ?

Browser parsing HTML is a process from top to bottom. When you put CSS's <link> in , the browser will first download and parse these stylesheets, and then render the page content. This can prevent the page from displaying "naked" HTML content first without style (that is, the commonly known as FOUC, flashing without style content).

If you place CSS at the or behind the page, the browser will first render HTML content without styles, and then re-draw the page after the CSS is downloaded. This will cause the page to flicker or layout to shake, and the user experience will be poor.

Will putting it in affect the loading speed?

Indeed, putting CSS in will cause the browser to pause the rendering of the page while loading the CSS, which looks like a "stumble". But this is actually a "delayed but stable" experience, which is much more comfortable than seeing the messy content first and then getting better.

If you are worried about load blocking, you can optimize it in the following ways:

  • Use media attribute to control the loading priority of certain style sheets (such as printing style sheets)
  • Compress CSS file volume
  • Use CDN to speed up resource loading
  • Inline critical CSS into , non-critical parts are lazy loaded

Are there any exceptions?

In some specific scenarios, it may be an option not to put all CSS in , for example:

  • Asynchronous loading of non-critical CSS: Some projects delay loading styles that are not used on the first screen to speed up the initial loading speed.
  • Dynamic skinning function: Dynamically insert CSS files of different themes through JS, and may not be placed in at the beginning.
  • In modern front-end frameworks, CSS may be packaged into components and the loading order is automatically handled by the build tool.

However, these are advanced optimization methods and are not suitable for all projects. For most websites, it is recommended to put the main stylesheet in .

Basically that's it. Although it is not a mandatory requirement, putting CSS is a simple and effective way, which can significantly improve the user's first visit experience.

The above is the detailed content of Why is it a best practice to put CSS tags in the ?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undress AI Tool

Undress AI Tool

Undress images for free

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

What is Autoprefixer and how does it work? What is Autoprefixer and how does it work? Jul 02, 2025 am 01:15 AM

Autoprefixer is a tool that automatically adds vendor prefixes to CSS attributes based on the target browser scope. 1. It solves the problem of manually maintaining prefixes with errors; 2. Work through the PostCSS plug-in form, parse CSS, analyze attributes that need to be prefixed, and generate code according to configuration; 3. The usage steps include installing plug-ins, setting browserslist, and enabling them in the build process; 4. Notes include not manually adding prefixes, keeping configuration updates, prefixes not all attributes, and it is recommended to use them with the preprocessor.

How can you animate an SVG with CSS? How can you animate an SVG with CSS? Jun 30, 2025 am 02:06 AM

AnimatingSVGwithCSSispossibleusingkeyframesforbasicanimationsandtransitionsforinteractiveeffects.1.Use@keyframestodefineanimationstagesforpropertieslikescale,opacity,andcolor.2.ApplytheanimationtoSVGelementssuchas,,orviaCSSclasses.3.Forhoverorstate-b

What is the conic-gradient() function? What is the conic-gradient() function? Jul 01, 2025 am 01:16 AM

Theconic-gradient()functioninCSScreatescirculargradientsthatrotatecolorstopsaroundacentralpoint.1.Itisidealforpiecharts,progressindicators,colorwheels,anddecorativebackgrounds.2.Itworksbydefiningcolorstopsatspecificangles,optionallystartingfromadefin

CSS tutorial focusing on mobile-first design CSS tutorial focusing on mobile-first design Jul 02, 2025 am 12:52 AM

Mobile-firstCSSdesignrequiressettingtheviewportmetatag,usingrelativeunits,stylingfromsmallscreensup,optimizingtypographyandtouchtargets.First,addtocontrolscaling.Second,use%,em,orreminsteadofpixelsforflexiblelayouts.Third,writebasestylesformobile,the

CSS tutorial for creating loading spinners and animations CSS tutorial for creating loading spinners and animations Jul 07, 2025 am 12:07 AM

There are three ways to create a CSS loading rotator: 1. Use the basic rotator of borders to achieve simple animation through HTML and CSS; 2. Use a custom rotator of multiple points to achieve the jump effect through different delay times; 3. Add a rotator in the button and switch classes through JavaScript to display the loading status. Each approach emphasizes the importance of design details such as color, size, accessibility and performance optimization to enhance the user experience.

European virtual currency trading platform ranking list 2025 latest list TOP10 inventory (recently updated) European virtual currency trading platform ranking list 2025 latest list TOP10 inventory (recently updated) Jul 11, 2025 pm 08:57 PM

The top ten virtual currency trading platforms in Europe in 2025 include Binance, OKX, Coinbase, etc., and are selected based on compliance, security, expenses, asset types and user experience. 1. Binance: The world has the largest transaction volume, low fees, and has obtained a license in multiple countries; 2. OKX: Comprehensive products, strong technology, registered in France; 3. Coinbase: Compliance and safety, suitable for beginners, licensed in many countries; 4. Gate.io: Has a long history, high security, registered in many European countries; 5. Bitstamp: Founded early, has strong compliance, regulated by Luxembourg; 6. eToro: Supports social transactions, diversified investment, regulated by CySEC; 7. Bitpanda: World

What is feature detection in CSS using @supports? What is feature detection in CSS using @supports? Jul 02, 2025 am 01:14 AM

FeaturedetectioninCSSusing@supportschecksifabrowsersupportsaspecificfeaturebeforeapplyingrelatedstyles.1.ItusesconditionalCSSblocksbasedonproperty-valuepairs,suchas@supports(display:grid).2.Thismethodensuresfuturecompatibilityandavoidsrelianceonunrel

Integrating CSS and JavaScript effectively with HTML5 structure. Integrating CSS and JavaScript effectively with HTML5 structure. Jul 12, 2025 am 03:01 AM

HTML5, CSS and JavaScript should be efficiently combined with semantic tags, reasonable loading order and decoupling design. 1. Use HTML5 semantic tags, such as improving structural clarity and maintainability, which is conducive to SEO and barrier-free access; 2. CSS should be placed in, use external files and split by module to avoid inline styles and delayed loading problems; 3. JavaScript is recommended to be introduced in front, and use defer or async to load asynchronously to avoid blocking rendering; 4. Reduce strong dependence between the three, drive behavior through data-* attributes and class name control status, and improve collaboration efficiency through unified naming specifications. These methods can effectively optimize page performance and collaborate with teams.

See all articles