How can you blur a background image in CSS without affecting foreground content?

Blurring Backgrounds with CSS: Avoiding Content Blur

Blurred backgrounds can enhance website aesthetics and focus attention on key content. But what if the blur unintentionally affects the content itself?

In this example, an attempt is made to blur the background image while preserving the clarity of the foreground text within a span element. To achieve this, CSS can be employed strategically.

The key technique involves utilizing the :before pseudo class to inherit the background image. A new div element with the class "blur-bgimage" is introduced, and a :before pseudo class is added. This pseudo element inherits the background image using the background: inherit property.

Next, the :before pseudo element is effectively blurred using CSS filters. By incorporating these filters (blur(10px) in this case), the background image is given the desired blur effect.

The ".blur-bgimage" div is then assigned overflow: hidden to conceal the blurred area beyond the div's boundaries. Margin, text alignment, and z-index are also set appropriately.

To toggle the blur effect, JavaScript can be employed to add or remove the ".blur-bgimage" class, as demonstrated in the provided jsfiddle example. Using this method, the background blur effect can be dynamically controlled without compromising the content's clarity.

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