Blur.js: Produce psuedo-transparent blurred elements over other elements.

Re:Blur.js: Produce psuedo-transparent blurred elements over... by jacobolus on Thursday March 08, 2012 @08:53PM (#3682571)

SVG can do it: http://www.w3.org/TR/SVG/filters.html#feGaussianBlurElement

Unfortunately, browser support of less common SVG features is spotty – either missing or unoptimized.

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Re:Blur.js: Produce psuedo-transparent blurred elements over... by callmevlad on Thursday March 08, 2012 @11:08PM (#3682870)

This seems like it applies the filter to the entire element (including its children), which would not give the same effect as blur.js without some complicated absolute-positioning trickery.

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Re:Blur.js: Produce psuedo-transparent blurred elements over... by pygy_ on Friday March 09, 2012 @08:28AM (#3683955)

You could do it like this with CSS, data URI and SVG:

    .blur {
      background-image: url('data:image/xml+svg;utf8,
        <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
          <defs>
            <filter id="f1">
              <feComponentTransfer>
                <feFuncR type="table" tableValues="0.5 1"/>
                <feFuncG type="table" tableValues="0.5 1"/>
                <feFuncB type="table" tableValues="0.5 1"/>
              </feComponentTransfer>
              <feGaussianBlur stdDeviation="5" /> 
            </filter>
          </defs>
    
          <image x="0" y="0" width="300" height="80" 
            xlink:href="http://background.png" 
            filter="url(#f1)" />
        </svg>
      ');
    }

(expanded for clarty, and I didn't test it so it may be buggy/not syntactically correct).

You can off course generate all that in JS and parametrize it.

It should work in Chrome, but won't in IE9. No idea for other browsers.

see http://jsfiddle.net/estelle/SJjJb/

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