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-webkit-background-clip: text polyfill

A SVG polyfill for -webkit-brackground-clip: text

What?

If you want to use background-clip: text it's only available in WebKit based browser

h1 {
  background: url(http://timpietrusky.com/cdn/army.png) repeat;
  -webkit-background-clip: text;
}

This polyfill uses CSS feature detection and if -webkit-background-clip: text is not available, it replaces the specified dom element with a SVG like this:

<svg>
  <pattern id="mypattern" patternUnits="userSpaceOnUse" width="750" height="800">
    <image width="750" height="800" xlink:href="http://timpietrusky.com/cdn/army.png"></image>
  </pattern>
  <text x="0" y="80" class="headline" style="fill:url(#mypattern);">background-clip: text | Polyfill</text>
</svg>

How to use it?

1. Add the polyfill to your page:

<script src="https://raw.github.com/TimPietrusky/background-clip-text-polyfill/master/background-clip-text-polyfill.js"></script>

2. Call the polyfill

Use it on any element, put keep in mind that the SVG text can't handle line breaks, so your content will be in one line.

var element = document.querySelector('.myelement'); 

/*
 * Call the polyfill
 *
 * patternID : the unique ID of the SVG pattern
 * patternURL : the URL to the background-image
 * class : the css-class applied to the SVG
 */
element.backgroundClipPolyfill({
  'patternID' : 'mypattern',
  'patternURL' : 'url/to/background/pattern',
  'class' : 'myelement'
});

Live example

You can see this in action on my CodePen: -webkit-background-clip: text Polyfill.


Handcrafted 2013 by Tim Pietrusky in Germany.

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A SVG polyfill for -webkit-background-clip: text

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