CSS VARIABLES
Contents
1. Introduction to CSS Variables
2. What are CSS Variables and Why they are Used
3. Syntax and Declaration of CSS Variables
4. Scope of CSS Variables
5. Using Variables in CSS Properties
6. Default Values and Fallbacks
7. Updating Variables with JavaScript
8. Advantages of CSS Variables
9. Disadvantages and Limitations
10. Performance Considerations
11. CSS Variables vs Preprocessor Variables
12. Real-World Applications
13. Common Mistakes
14. Conclusion
, 1. Introduction to CSS Variables
CSS Variables, also known as custom properties, allow developers to store values that can be
reused throughout a stylesheet. These values can include colors, fonts, spacing, and other
design-related properties. CSS Variables make stylesheets more flexible and easier to manage.
They were introduced to solve problems related to repetition and maintainability in CSS. Instead
of writing the same value multiple times, developers can define it once and reuse it wherever
needed.
CSS Variables are dynamic, meaning they can be updated and changed at runtime. This makes
them more powerful than traditional CSS values.
They are widely used in modern web development for creating consistent and scalable designs.
Understanding CSS Variables is essential for writing efficient and maintainable CSS code.
2. What are CSS Variables and Why they are Used
CSS Variables are user-defined values that can be stored and reused in CSS. They are defined
using a special syntax that starts with two hyphens.
The main reason they are used is to improve maintainability. When a value needs to be
changed, it can be updated in one place instead of multiple locations.
They also improve consistency by ensuring that the same values are used throughout the
stylesheet.
Contents
1. Introduction to CSS Variables
2. What are CSS Variables and Why they are Used
3. Syntax and Declaration of CSS Variables
4. Scope of CSS Variables
5. Using Variables in CSS Properties
6. Default Values and Fallbacks
7. Updating Variables with JavaScript
8. Advantages of CSS Variables
9. Disadvantages and Limitations
10. Performance Considerations
11. CSS Variables vs Preprocessor Variables
12. Real-World Applications
13. Common Mistakes
14. Conclusion
, 1. Introduction to CSS Variables
CSS Variables, also known as custom properties, allow developers to store values that can be
reused throughout a stylesheet. These values can include colors, fonts, spacing, and other
design-related properties. CSS Variables make stylesheets more flexible and easier to manage.
They were introduced to solve problems related to repetition and maintainability in CSS. Instead
of writing the same value multiple times, developers can define it once and reuse it wherever
needed.
CSS Variables are dynamic, meaning they can be updated and changed at runtime. This makes
them more powerful than traditional CSS values.
They are widely used in modern web development for creating consistent and scalable designs.
Understanding CSS Variables is essential for writing efficient and maintainable CSS code.
2. What are CSS Variables and Why they are Used
CSS Variables are user-defined values that can be stored and reused in CSS. They are defined
using a special syntax that starts with two hyphens.
The main reason they are used is to improve maintainability. When a value needs to be
changed, it can be updated in one place instead of multiple locations.
They also improve consistency by ensuring that the same values are used throughout the
stylesheet.
