Circle with Double Borders
In this article, we explore a solution to the challenge of adding double borders to circular elements. Squares and rectangles readily lend themselves to double borders, but applying the same technique to circles requires a more creative approach.
Consider the CSS provided in the problem statement, which generates a circular div with a single green border:
div.circle { width: 90%; height: 0; padding-bottom: 90%; margin: auto; float: none; border-radius: 50%; border: 1px solid green; background: pink; }
Our objective is to modify this CSS to create double borders. The outline property was previously attempted without success, as it produced a rectangular outline. Nested divs and background colors also proved ineffective due to alignment issues.
To achieve our desired effect, we modify the CSS as follows:
div { width: 20em; height: 20em; border-radius: 50%; background-color: red; border: 4px solid #fff; box-shadow: 0 0 0 5px red; }
This CSS creates a div with a solid white border and a red inner shadow. The box-shadow property emulates the second border by projecting a colored inset from the div's edge.
The key difference between this solution and previous attempts lies in the use of a box shadow instead of a second border or outline. By creatively employing box shadow, we achieve the illusion of a double border without sacrificing the circular shape.
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