Method runAnim

src/service/vsync-impl.js:300–311

* Runs the animation vsync task. This operation can only run when animations * are allowed. Otherwise, this method returns `false` and exits. * @param {!Node} contextNode * @param {!VsyncTaskSpecDef} task * @param {!VsyncStateDef=} opt_state * @return {boolean}

(contextNode, task, opt_state)

   * @return {boolean}
   */
  runAnim(contextNode, task, opt_state) {
    // Do not request animation frames when the document is not visible.
    if (!this.canAnimate_(contextNode)) {
      dev().warn(
        'VSYNC',
        'Did not schedule a vsync request, because document was invisible'
      );
      return false;
    }
    this.run(task, opt_state);
    return true;
  }

  /**
   * Creates an animation vsync task. This operation can only run when