Question 1

What CSS filters are available?

Accepted Answer

Blur, brightness, contrast, grayscale, hue-rotate, invert, opacity, saturate, and sepia. Each filter can be adjusted independently, and multiple filters are combined into a single CSS filter property.

Question 2

Do CSS filters affect performance?

Accepted Answer

Simple filters like brightness and contrast have minimal impact. Blur is the most expensive, especially at large radius values. Avoid applying blur to large elements or during animations. GPU acceleration helps on most modern browsers.

Question 3

Can I apply filters to any HTML element?

Accepted Answer

Yes. The CSS filter property works on any element: images, divs, text, videos, even SVGs. It applies the effect visually without changing the actual content. Use backdrop-filter for frosted glass effects on backgrounds.

Question 4

What is the difference between filter and backdrop-filter?

Accepted Answer

filter applies effects to the element itself and its children. backdrop-filter applies effects to the area behind the element (the backdrop). Use backdrop-filter for frosted glass effects over background content.

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