Remove CSS :hover rules for touch devices to avoid iOS double-tap behavior. Copied and adapted from http://retrogamecrunch.com/tmp/hover (just a fix for sheet.cssRules)

remove_hover_rule.js

// disable :hover on touch devices
// based on https://gist.github.com/4404503 
// via https://twitter.com/javan/status/284873379062890496
// + https://twitter.com/pennig/status/285790598642946048
// re http://retrogamecrunch.com/tmp/hover
// NOTE: we should use .no-touch class on CSS
// instead of relying on this JS code
function removeHoverCSSRule() {
  if ('createTouch' in document) {
    try {
      var ignore = /:hover/;
      for (var i = 0; i < document.styleSheets.length; i++) {
        var sheet = document.styleSheets[i];
        if (!sheet.cssRules) {
          continue;
        }
        for (var j = sheet.cssRules.length - 1; j >= 0; j--) {
          var rule = sheet.cssRules[j];
          if (rule.type === CSSRule.STYLE_RULE && ignore.test(rule.selectorText)) {
            sheet.deleteRule(j);
          }
        }
      }
    }
    catch(e) {
    }
  }
}