Lennart Schoors also has a nice write-up with practical examples using tooltips and icons that we previously called out. Let’s cap this off with a few other great examples illustrating that. That means that the spread radius you might specify in box-shadow is not one-to-one with the default spread value for drop-shadow, so the two are not equal replacements of one another in some cases. Update: Amelia identified another key difference in the comments where the spread of the radius for drop-shadow() is calculated differently than box-shadow and even that of text-shadow. There are other differences that distinguish the two in terms of browser support, performance and such, but the way the two treat the box model is the key difference. The difference between box-shadow and filter: drop-shadow() really boils down to the CSS box model. Hardware accelerated in browsers that support it. Here’s a side-by-side comparison to help distinguish the two and when it might be best to choose one over the other.ĬSS Backgrounds and Borders Module Level 3Ĭalculation is based on the stdDeviation attribute of the SVG filter Like most things in development, the answer of which method to use depends. A drop shadow is effectively a blurred, offset version of the input image’s alpha mask drawn in a particular color, composited below the image. It’s merely an illustration of their different behaviors in a specific context. drop-shadow() filter: drop-shadow(2px 2px 5px rgb(0 0 0 / 0.5)) filter: drop-shadow(4px 4px red) / no blur / Applies a drop shadow effect to the input image. Notice that after you add the transition, the hover effect is a smooth fade between the None state and the Hover state. The simple example of a triangle above might make it seem that filter: drop-shadow() is better, but it’s not a fair comparison of the benefits or even the possibilities of both methods. CodePen Embed Fallback Deciding Which Method to Use
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