如何用javascript消除

(how to eliminate

with javascript)

 实际上，我的问题并没有完全解决......事情是，我在mvc中制作了一棵树，并且为了展开和折叠树，我添加了这个可以在下面看到的Java脚本代码。 起初我给每个人增加了一个'句柄'类 
 
 节点，然后我将添加展开它的崩溃。但在应用此代码后，我的树不能正确显示... 
 在这里输入图像描述 
 在图像中你可以看到'fff'和'ggg'必须处于同一个水平，因为他们都是'eee'的子女。 'ccc'似乎是'bbb'的孩子，但它也必须与'bbb'处于同一水平。因为'bbb'和'ccc'都是'aaa'的孩子.... 
 我不知道为什么Java脚本代码不起作用。 
 $（document）.ready（function（）{jQuery（“＃tree ul”）。hide（）; 
   jQuery("#tree li").prepend("<span class='handle'></span>");

    jQuery("#tree li:has(ul)")
      .children(":first-child").addClass("collapsed")
      .click(function () {
          jQuery(this).toggleClass("collapsed expanded")
            .siblings("ul").toggle();
      });
});

$(function () {
    $("ul#tree li").each(function () {
        as = $(this).children('a');
        if (!as.length) {  //
            $(this).hide();
        }
    })
});

Actually,my problem is not solved completely...The thing is that i made a tree in mvc and for having expanded and collapsed tree ,i added this java script code which you can see below. at first i add a 'handle' class to each 
 
 node and then i will add collapse expanded on it.But after applying this codes my tree is not displayed properly...
 
enter image description here
 
in the image u can see that 'fff' and 'ggg' must be in a same level because they are both children of 'eee' . 'ccc' seems to be the child of 'bbb' but it also must be in the same level as 'bbb'.Because both 'bbb' and 'ccc' are children of 'aaa'....
 
i dont know why java script code does not work.
 
$(document).ready(function () { jQuery("#tree ul").hide();
 
   jQuery("#tree li").prepend("<span class='handle'></span>");

    jQuery("#tree li:has(ul)")
      .children(":first-child").addClass("collapsed")
      .click(function () {
          jQuery(this).toggleClass("collapsed expanded")
            .siblings("ul").toggle();
      });
});

$(function () {
    $("ul#tree li").each(function () {
        as = $(this).children('a');
        if (!as.length) {  //
            $(this).hide();
        }
    })
});
 

原文：https://stackoverflow.com/questions/43925343