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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: Change all background-color attribute values
Date: Mon, 23 Nov 2015 11:27:09 +0000
Organization: PointedEars Software (PES)
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Thomas 'PointedEars' Lahn wrote:

>   [].slice.call(document.styleSheets).forEach(function (styleSheet) {
>     [].slice.call(styleSheet.cssRules || styleSheet.rules, function (rule)
>     [{
>       var bgColor = rule.style["background-color"];
>       if (bgColor) rule.style["background-color"] = some_funct(bgColor);
>     });
>   });

Correction:

  var _slice = [].slice;
  _slice.call(document.styleSheets).forEach(function (styleSheet) {
    _slice.call(styleSheet.cssRules || styleSheet.rules).forEach(
      function changeRule (rule) {
        /* @media, @keyframes etc. rules */
        if (rule.cssText.substring(0, 1) == "@")
        {
          return _slice.call(rule.cssRules).forEach(changeRule);
        }

        var bgColor = rule.style.backgroundColor;
        if (bgColor) rule.style.backgroundColor = some_funct(bgColor);
      });
  });

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