Adding drop shadows/borders that wrap around transparent images?

[Corrupted Unicorn]

Hello, I'm in love with the drop shadow the HalfMoon Art Hub gives to transparent images and I'd like to ask how can I achieve something like that on my own thru code, or even if it'd be possible to give a border to transparent images that wraps around them.

I usually give transparent images on my site a sticker-like white border thru an image edition program, although for my next idea I'm going to handle many graphics at once, and thus I could use some code help.

By the way, are there other visual "effects" that can be applied thru code?

[Melooon]

The art hub uses filters  Just add this CSS to your images:

Code

filter: drop-shadow(3px 3px 1px rgba(18, 27, 26, 0.29));

The first two numbers are the offset, the 3rd number is the blur, and the rgba value is the colour of the shadow (rgba being colour with opacity, the last number 0.29 is how see-through it is, with 1 being totally solid and 0 being totally transparent)

I would also note that filters can be quite demanding on your browser! So if you know that your shadow will always be on a square object, use box-shadow instead, it will bog your site down a little less!