Nested Gradients with background-clip

background-clip isn't a CSS property frequently used in everyday web development. However, it offers unique capabilities, as highlighted by Stefan Judis' and Ana Tudor's insightful posts.

Let's clarify its function. You're likely familiar with the visual representation of an element's dimensions, encompassing content, padding, margin, and border. These aren't just conceptual aids; they represent actual boxes: content-box, padding-box, and border-box. The box-sizing property directly interacts with these, and setting it to border-box is a common best practice.

Crucially, background-clip leverages these same boxes. It allows you to restrict a background to only fill specific areas – the content-box, padding-box, or border-box. And since CSS supports multiple backgrounds, you can apply this clipping to each individually.

While simple background layering can be achieved through other methods like borders, outlines, and box-shadows, the true power of background-clip shines when working with gradients. Creating nested gradients with precise control over their placement within the element's boxes is significantly more challenging without this property.

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