//立即执行函数
(function (window, undefined) {
  var Ygtoast = function () {
    //构造函数大驼峰命名法
  };
  Ygtoast.prototype = {
    //prototype 属性使您有能力向对象添加属性和方法。
    create: function (str, duration) {
      let self = this;
      var toastHtml = "";
      var toastText = '<div class="yg-toast-text">' + str + "</div>";
      toastHtml = '<div class="yg-toast">' + toastText + "</div>";
      if (document.querySelector(".yg-toast")) return; //当还没hide时禁止重复点击
      document.body.insertAdjacentHTML("beforeend", toastHtml);
      duration == null ? (duration = 2000) : ""; //如果toast没有加上时间，默认2000毫秒；
      self.show();
      setTimeout(function () {
        self.hide();
      }, duration);
    },
    show: function () {
      let self = this;
      document.querySelector(".yg-toast").style.display = "block";
      document.querySelector(".yg-toast").style.marginTop =
        "-" +
        Math.round(document.querySelector(".yg-toast").offsetHeight / 2) +
        "px";
      if (document.querySelector(".yg-toast")) return;
    },
    hide: function () {
      var self = this;
      if (document.querySelector(".yg-toast")) {
        document
          .querySelector(".yg-toast")
          .parentNode.removeChild(document.querySelector(".yg-toast"));
      }
    },
    toast: function (str, duration) {
      var self = this;
      return self.create(str, duration);
    },
  };
  window.Ygtoast = Ygtoast;
})(window);