code: function initAnim(element, gpuTrigger) {
    var style = element.style;
    style.webkitTapHighlightColor = 'transparent';
  
    // Only when it has no shadow
    var cssPropBoxShadow = CSSPrefix.getName('boxShadow'),
        boxShadow = window.getComputedStyle(element, '')[cssPropBoxShadow];
    if (!boxShadow || boxShadow === 'none') {
      style[cssPropBoxShadow] = '0 0 1px transparent';
    }
  
    if (gpuTrigger && cssPropTransform) {
      style[cssPropTransform] = 'translateZ(0)';
    }
    return element;
  }
docs: Optimize an element for animation.
  @param {Element} element - A target element.
  @param {?boolean} gpuTrigger - Initialize for SVGElement if `true`.
  @returns {Element} A target element.