CSS Compatibility
CSS compatibility means that our styles should appear the same across different browsers and versions. This is critical to ensure a consistent user experience.
Using vendor prefixes
Vendor prefixes help use experimental CSS properties until they become standardized. For example, -webkit- for Safari and Chrome, -moz- for Firefox.
This example demonstrates how to use vendor prefixes in a simple border-radius setting.
Feature Queries (@supports)
@supports allows us to conditionally apply CSS rules depending on whether the browser supports a given property.
This example shows how to set up a flexible layout that uses grid if available, otherwise flexbox.
Support for key features
| Feature | Chrome | Firefox | Safari | Edge |
|---|---|---|---|---|
| Flexbox | ✔ | ✔ | ✔ | ✔ |
| CSS Grid | ✔ | ✔ | 12+ | ✔ |
| mask-image | ✔ | ✔ | ✔ | ✘ |
Tips for improving CSS compatibility
Some best practices to make sure your CSS works reliably in all browsers.
- Always check property support on caniuse.com.
- Use feature queries to conditionally apply modern properties.
- Test the site in multiple browsers and devices before going live.
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