🆚 CSS vs. Preconnect
- 📈 CSS is four times more popular than Preconnect.
- 🌍 CSS is more popular in all countries.
CSSType
About
Cascading Style Sheets (CSS) is a stylesheet language used to control the presentation of 
HTML and 
XML documents, defining layout, colors, typography, and responsive behavior across different devices.
It uses a cascading and specificity model to resolve style conflicts, supports reusable rules and selectors, and includes layout systems such as Flexbox and Grid, media queries for responsive design, and features for animations, transformations, and advanced text formatting.
The rel="preconnect" attribute on HTML <link> elements instructs browsers to establish early connections to external origins before resources are requested.
It is used to reduce latency by opening DNS lookup, TCP handshake, and TLS negotiation in advance for critical third-party domains such as CDNs, font providers, and analytics services.
Headquarters
Categories
Popularity
Determined by the number of sites using each technology.
Market share
Popularity by country
Determined by the number of sites detected from each country.
Awards
- 🥇 Most popular in the United States in the Standards category.
- 🥇 Most popular in Japan in the Standards category.
- 🥇 Most popular in the United Kingdom in the Standards category.
- 🥇 Most popular in France in the Standards category.
- 🥇 Most popular in Russia in the Standards category.
- 🥇 Most popular in Thailand in the Performance Optimization category.
- 🥇 Most popular in Korea in the Performance Optimization category.
- 🥇 Most popular in Cyprus in the Performance Optimization category.
- 🥇 Most popular in the British Virgin Islands in the Performance Optimization category.
- 🥇 Most popular in Cambodia in the Performance Optimization category.
Popularity by domain category
Determined by the number of sites in each category.
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
YAML
Sass
Speculation Rules
Instant.Page🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 3,531,009 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.