ブラウザが CSS3 属性をサポートしているかどうかを判断するための JavaScript のさまざまなメソッド

var support_css3 = (function() {
 var div = document.createElement('div'),
  vendors = 'Ms O Moz Webkit'.split(' '),
  len = vendors.length;
  
 return function(prop) {
  if ( prop in div.style ) return true;
  
  prop = prop.replace(/^[a-z]/, function(val) {
   return val.toUpperCase();
  });
  
  while(len--) {
   if ( vendors[len] + prop in div.style ) {
   return true;
   }
  }
  return false;
 };
})();

if(support_css3('transform')){
 
}else{
 
}

function isPropertySupported(property)
{
 return property in document.body.style;
}

if(isPropertySupported('opacity')){
 
}else{
 
}

//pass the same string as you pass to the @supports rule
if(CSS.supports("(background-color: red) and (color:white"))
{
 document.body.style.color = "white";
 document.body.style.backgroundColor = "red";
}