Can CSS Achieve Background Blur for Semi-Transparent Elements without Affecting Content?

Achieving Background Blur in CSS: A Guide to Dynamic Transparent Effects

Question:

It is desirable to create a Vista/7-aero-glass-style effect on a popup window. Although cross-browser compatibility is not a priority, the website must function in modern browsers. Is it possible to blur the background of a semi-transparent element without affecting its contents using CSS alone?

Answer:

Updated: October 2016

Using Pseudo-Elements:

• Demo: [Live Demo](link)
• Utilize pseudo-elements to create a background blur without affecting the container's contents.
• Combine the use of pseudo-elements with the SVG blur filter.

Compatibility:

• Support for the SVG blur filter is widely available in modern browsers (except for IE).
• Pseudo-element support is limited to Firefox.

Previously: Utilizing the -moz-element() Property:

• Demo: [Live Demo](link)
• Employ the -moz-element() property in combination with the SVG blur filter.
• Use jQuery for scrolling if the background is in a fixed position.

Compatibility:

• Restricted to Mozilla browsers (-moz-element() is limited to Firefox).
• May require additional effort for implementation in other browsers.

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