Introduction
CSS performance is crucial for a website's speed and user experience. This section covers fundamental concepts and best practices.
- Understanding the Pipeline: The CSS Pipeline is essential. It's a series of steps that improve performance – from browser rendering to CSS download and processing.Minification and Compression: Reduce file sizes.
- CSS-specific techniques: Avoid unnecessary elements, use selectors effectively, and optimize font loading.
More advanced optimization techniques, like CSS selectors and utilizing CSS variables, can drastically reduce load times.
Key Concepts
– **Selectors:** Identify specific elements to style.
– **Properties:** Define the desired styling (e.g., background-color, font-size).
– **Specificity:** Determine which CSS rules take precedence.
– **Inheritance:** CSS rules can be inherited by child elements.
– **CSS Display Property: `block`, `inline`, `inline-block`, `none` can affect performance.
Performance Optimization Techniques
– **Minimize CSS:** Reduce the number of rules. Use `!important` sparingly.
– **Optimize Images:** Use WebP, compress images, and use responsive images for different screen sizes.
– **Code Splitting:** Break your CSS into smaller chunks.
– **Asset Bundling:** Combine multiple CSS files into a single file.
– **Lazy Loading: Load CSS elements only when they are needed.
Resources
- [https://www.w3schools.com/css/default.asp](https://www.w3schools.com/css/default.asp)
- [https://www.css-performance.com/](https://www.css-performance.com/