(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global.ptrAnimatesIos = factory());
}(this, (function () { 'use strict';

  var animates = {
    pulling: function pulling(d, opts) {
      if (!opts.elSpinner) {
        opts.elMain = opts.container.querySelector('.pull-to-refresh-ios__main');
        opts.elSpinner = opts.container.querySelector('.pull-to-refresh-ios__spinner');
      }

      var threshold = opts.threshold,
          elMain = opts.elMain,
          elSpinner = opts.elSpinner;


      var p = d / threshold;
      if (p > 1) p = 1;else p = p * p * p;

      var spinnerCls = Math.floor(p * 12);
      if (opts.spinnerCls !== spinnerCls) {
        if (opts.spinnerCls) elSpinner.classList.remove('pull-to-refresh-ios__spinner--s' + opts.spinnerCls);
        if (spinnerCls) elSpinner.classList.add('pull-to-refresh-ios__spinner--s' + spinnerCls);
        opts.spinnerCls = spinnerCls;
      }

      var y = d / 2.5;
      elMain.style.transform = y ? 'translate3d(0, ' + y + 'px, 0)' : '';
    },
    refreshing: function refreshing(_ref) {
      var elMain = _ref.elMain,
          threshold = _ref.threshold;

      elMain.style.transition = 'transform 0.2s';
      elMain.style.transform = 'translate3d(0, ' + threshold / 2.5 + 'px, 0)';
    },
    aborting: function aborting(opts) {
      return new Promise(function (resolve) {
        var elMain = opts.elMain,
            elSpinner = opts.elSpinner;


        var n = opts.spinnerCls;
        opts.spinnerCls = null;
        if (n) {
          var timer = setInterval(function () {
            elSpinner.classList.remove('pull-to-refresh-ios__spinner--s' + n);
            if (--n === 0) clearInterval(timer);else elSpinner.classList.add('pull-to-refresh-ios__spinner--s' + n);
          }, 300 / n);
        }

        if (elMain.style.transform) {
          elMain.style.transition = 'transform 0.3s';
          elMain.style.transform = 'translate3d(0, 0, 0)';
          elMain.addEventListener('transitionend', function () {
            elMain.style.transition = '';
            resolve();
          });
        } else {
          resolve();
        }
      });
    },
    restoring: function restoring(opts) {
      return new Promise(function (resolve) {
        var elMain = opts.elMain,
            elSpinner = opts.elSpinner,
            spinnerCls = opts.spinnerCls;

        if (spinnerCls) elSpinner.classList.remove('pull-to-refresh-ios__spinner--s' + spinnerCls);
        opts.spinnerCls = null;
        elMain.style.transition = 'transform 0.3s';
        elMain.style.transform = 'translate3d(0, 0, 0)';
        elMain.addEventListener('transitionend', function () {
          elMain.style.transition = '';
          resolve();
        });
      });
    }
  };

  return animates;

})));