检查-moz-border-radius支持的最佳方法

.supports-border-radius {
  border-radius: 5px;
  -moz-border-radius: 5px;
}

function supportsBorderRadius() {
  var div = document.createElement('div');
  div.style.borderRadius = '5px';
  div.style.MozBorderRadius = '5px';
  div.style.width = '10px';
  div.style.height = '10px';
  document.body.appendChild(div);
  var supports = div.offsetWidth === 10;
  document.body.removeChild(div);
  return supports;
}

if (supportsBorderRadius()) {
  document.documentElement.classList.add('supports-border-radius');
}