filter()The filter() CSS function applies one or more graphic effects to a CSS image, such as a background image. You can use functions, such as blur() and drop-shadow(), alone or combined to produce different effects. For instance, background: filter(url(image.png), blur(2px)).cssCSSlimitedhttps://drafts.csswg.org/filter-effects-1/#FilterCSSImageValuecss-filter-functionhttps://developer.mozilla.org/docs/Web/CSS/Reference/Values/imagecss.types.image.filterhttps://nowyoucanuse.com/features--filter-function.html