"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.flex = exports.transition = exports.animation = void 0;

var _dom = require("./dom");

var _object = require("./object");

var animationEndEventNames = {
  WebkitAnimation: 'webkitAnimationEnd',
  OAnimation: 'oAnimationEnd',
  animation: 'animationend'
};
var transitionEventNames = {
  WebkitTransition: 'webkitTransitionEnd',
  OTransition: 'oTransitionEnd',
  transition: 'transitionend'
};
/**
 * 是否支持某些动效事件，如果支持，返回相应的end事件名
 * @private
 * @param  {Object<String>} names
 * @return {Object|false}
 */

function _supportEnd(names) {
  /* istanbul ignore if */
  if (!_dom.hasDOM) {
    return false;
  }

  var el = document.createElement('div');
  var ret = false;
  (0, _object.each)(names, function (val, key) {
    /* istanbul ignore else */
    if (el.style[key] !== undefined) {
      ret = {
        end: val
      };
      return false;
    }
  });
  return ret;
}
/**
 * 是否支持某些CSS属性
 * @private
 * @param  {Object<Array<String>>} names
 * @return {Boolean}       is support
 */


function _supportCSS(names) {
  /* istanbul ignore if */
  if (!_dom.hasDOM) {
    return false;
  }

  var el = document.createElement('div');
  var ret = false;
  (0, _object.each)(names, function (val, key) {
    (0, _object.each)(val, function (item) {
      try {
        el.style[key] = item;
        ret = ret || el.style[key] === item;
      } catch (e) {// It will be throw error when set unknown property under IE8
      }

      return !ret; // 如果有一个支持就返回false，后面不需要再判断
    });
    return !ret;
  });
  return ret;
}
/**
 * 是否支持animation以及动画结束事件名
 * @type {Object|false}
 * @property {String} end 动画结束事件名
 */


var animation = _supportEnd(animationEndEventNames);
/**
 * 是否支持transition以及过滤效果结束事件名
 * @type {Object|false}
 * @property {String} end 过渡效果结束事件名
 */


exports.animation = animation;

var transition = _supportEnd(transitionEventNames);
/**
 * 是否支持flex属性
 * @type {Boolean}
 */


exports.transition = transition;

var flex = _supportCSS({
  display: ['flex', '-webkit-flex', '-moz-flex', '-ms-flexbox']
});

exports.flex = flex;