animate.css "animateElement" method for an ES2015 Class

animateElementMethod.js

// A method withn an es2015 Class
// requires animate.css (https://daneden.github.io/animate.css/)
// animation defaults to "pulse"
// call it, watch animation, end event binds and unbinds after one use, removing animate classes.
  animateElement($element, animationType) {
    // animate.css animate type
    animationType = animationType || "pulse";
    let animationClasses = 'animated ' + animationType; 
    let animationEnd = 'webkitAnimationEnd mozAnimationEnd MSAnimationEnd oanimationend animationend'; 
    $element.addClass(animationClasses).one(animationEnd,function() {
      $element.removeClass(animationClasses);        
    });
  }