javascript - 无法在函数类中编写每个

Question

每当我编写以下内容时，我都无法编写每个函数类，为什么会出现错误？

<script>
        var addLi = function($li) {
            var $uls = $('ul');
            $.each($uls, function(index, ul) {
                // If this ul has less than 5 li's
                // then add the li here
                if ($(this).find('li').length < 5) {
                    $(this).append($li);
                    // exit the for loop since we have placed this li
                    return;  
                }
            }
            };
    </script>

Answer 1

您只是没有关闭.each()命令。

$.each($uls, function(index, ul) {
  // If this ul has less than 5 li's
  // then add the li here
  if ($(this).find('li').length < 5) {
    $(this).append($li);
    // exit the for loop since we have placed this li
    return;  
  }
}); // <---------- here is the closing brackets for the each()

each 的回调函数由大括号终止，但它只是each()命令的参数。

Answer 2

尝试这个

<script>
    var addLi = function($li) {
        var $uls = $('ul');
        $.each($uls, function(index, ul) {
            // If this ul has less than 5 li's
            // then add the li here
            if ($(this).find('li').length < 5) {
                $(this).append($li);
                // exit the for loop since we have placed this li
                return;  
            }
        }); // close brace missing here before
    };
</script>

你错过);了$.each