Javascript 如何在jQuery each（）中传递1个以上的参数？

如何将索引和元素以外的内容传递给jQuery的每个函数？ 我正在尝试归档以下内容：

function HelloWorld() {
   this.foo = function(obj) {
      console.log(obj);
   }

   this.test = function(className) {
      var that = this; // I need HelloWorld inside
      $("."+className).each(function(hw) {
          hw.foo(this);
      }(that));
   }
}

      var that = this;
      $("."+className).each(function(index, elm) {
          // `this` here is element of className
          // `elm` here is the same as this
          // `that` here is what `this` was in higher closure
          // `index` here is the number of the element in a sequence

      });

然后在页面的某个地方，假设我有十几个元素，它们都有一个特定的类名

例：

但是，当我在each函数中时，this成为整个页面的全局this，我需要它是来自$.+className的jQuery元素的this

如果我没有在匿名函数的末尾传递它，那么这将是$.+className.

中的元素，它位于更高的范围内，因此它已经在每个循环中可用：

function HelloWorld() {
   this.foo = function(obj) {
      console.log(obj);
   }

   this.test = function(className) {
      var that = this;
      $("."+className).each(function(index, elem) {
          that.foo(elem);
      });
   }
}

这在更高的范围内，因此它在每个循环中都已可用：

function HelloWorld() {
   this.foo = function(obj) {
      console.log(obj);
   }

   this.test = function(className) {
      var that = this;
      $("."+className).each(function(index, elem) {
          that.foo(elem);
      });
   }
}

---

这里有一个错误：

      var that = this;
      $("."+className).each(function(hw) {
          hw.foo(this);
      }(that));

这部分不好：

      }(that));

来自更高闭包的所有变量都已经可用，您不需要以任何方式传递它

应该是这样的:

function HelloWorld() {
   this.foo = function(obj) {
      console.log(obj);
   }

   this.test = function(className) {
      var that = this; // I need HelloWorld inside
      $("."+className).each(function(hw) {
          hw.foo(this);
      }(that));
   }
}

      var that = this;
      $("."+className).each(function(index, elm) {
          // `this` here is element of className
          // `elm` here is the same as this
          // `that` here is what `this` was in higher closure
          // `index` here is the number of the element in a sequence

      });

---

这里有一个错误：

      var that = this;
      $("."+className).each(function(hw) {
          hw.foo(this);
      }(that));

这部分不好：

      }(that));

来自更高闭包的所有变量都已经可用，您不需要以任何方式传递它

应该是这样的:

function HelloWorld() {
   this.foo = function(obj) {
      console.log(obj);
   }

   this.test = function(className) {
      var that = this; // I need HelloWorld inside
      $("."+className).each(function(hw) {
          hw.foo(this);
      }(that));
   }
}

      var that = this;
      $("."+className).each(function(index, elm) {
          // `this` here is element of className
          // `elm` here is the same as this
          // `that` here is what `this` was in higher closure
          // `index` here is the number of the element in a sequence

      });

---

您没有真正正确地执行此操作，是什么让您认为可以将foo链接到DOM元素？请注意DIV不是一个自动关闭的元素？您没有真正正确地执行此操作，是什么让您认为可以将foo链接到DOM元素？请注意DIV不是一个自动关闭的元素？