How Do I Create Rounded Corners in CSS Using `border-radius`?

CSS Rounded Corners: A Comprehensive Guide Using border-radius

In the realm of CSS, creating rounded corners is a common task that has evolved with the introduction of CSS3. The most reliable and straightforward method today is utilizing the border-radius property.

How to Use border-radius

The border-radius property accepts values representing the radius of the corners in pixels or percentages. You can specify a single value for all corners or separate values for each individual corner. For instance:

border-radius: 10px;  // 10px radius for all corners
border-radius: 10px 20px;  // 10px radius for top corners, 20px radius for bottom corners
border-radius: 10px 20px 30px 40px;  // Custom radii for each corner

Browser Compatibility

CSS3 is widely supported by modern browsers, including:

• Chrome (v4 )
• Firefox (v4 )
• IE9
• Opera (v10.5 )
• Safari (v5 )

Alternatives for Older Browsers

For browsers that do not support border-radius, various alternative techniques exist:

• CSS Design: Creating Custom Corners & Borders
• CSS Rounded Corners 'Roundup'
• 25 Rounded Corners Techniques with CSS

These approaches offer a range of solutions, including using images, JavaScript, or hacks. Choose the one that best suits your site and coding preferences.

Conclusion

Creating rounded corners using CSS has become incredibly easy and versatile with the advent of border-radius. Browser compatibility is excellent, and alternatives are available for older browsers. By utilizing the techniques outlined in this guide, you can effortlessly add beautiful and modern rounded corners to your web designs.

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