Function wrapPlay

src/core/component.js:740–752

* Wrapper for defined play method. * Play component by adding tick behavior and calling user's play method. * * @param {function} playMethod * @returns {function}

(playMethod)

 * @returns {function}
 */
function wrapPlay (playMethod) {
  return function play () {
    var sceneEl = this.el.sceneEl;
    var shouldPlay = this.el.isPlaying && !this.isPlaying;
    if (!this.initialized || !shouldPlay) { return; }
    playMethod.call(this);
    this.isPlaying = true;
    this.eventsAttach();
    // Add tick behavior.
    if (!hasBehavior(this)) { return; }
    sceneEl.addBehavior(this);
  };
}

function isObject (value) {
  return value && value.constructor === Object && !(value instanceof window.HTMLElement);