aa.vue

<template>
  <div class="home">
    <img alt="Vue logo" src="../assets/logo.png">
    <div class="tree">
      <ul>
          <li>
              <span><i class="icon-calendar"></i> 2013, Week 2</span>
              <ul>
                  <li>
                    <span class="badge badge-success"><i class="icon-minus-sign"></i> Monday, January 7: 8.00 hours</span>
                      <ul>
                          <li>
                            <a href=""><span><i class="icon-time"></i> 8.00</span> &ndash; Changed CSS to accomodate...</a>
                          </li>
                      </ul>
                  </li>
              </ul>

          </li>
      </ul>
    </div>
  </div>
</template>

<script>
import $ from 'jquery'
export default {
  name: 'home',
  data(){
    return{

    }
  },
   mounted(){
     
    $(function(){

        $('.tree li:has(ul)').addClass('parent_li').find(' > span').attr('title', 'Collapse this branch');

        $('.tree li.parent_li > span').on('click', function (e) {
        
            var children = $(this).parent('li.parent_li').find(' > ul > li');
            if (children.is(":visible")) {

                children.hide('fast');

                $(this).attr('title', 'Expand this branch').find(' > i').addClass('icon-plus-sign').removeClass('icon-minus-sign');

            } else {

                children.show('fast');

                $(this).attr('title', 'Collapse this branch').find(' > i').addClass('icon-minus-sign').removeClass('icon-plus-sign');

            }

            e.stopPropagation();

        });

    });
 }
}
</script>
<style scoped>
.tree {
    min-height:20px;
    padding:19px;
    margin-bottom:20px;
    background-color:#fbfbfb;
    border:1px solid #999;
    -webkit-border-radius:4px;
    -moz-border-radius:4px;
    border-radius:4px;
    -webkit-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);
    -moz-box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05);
    box-shadow:inset 0 1px 1px rgba(0, 0, 0, 0.05)
}
.tree li {
    list-style-type:none;
    margin:0;
    padding:10px 5px 0 5px;
    position:relative
}
.tree li::before, .tree li::after {
    content:'';
    left:-20px;
    position:absolute;
    right:auto
}
.tree li::before {
    border-left:1px solid #999;
    bottom:50px;
    height:100%;
    top:0;
    width:1px
}
.tree li::after {
    border-top:1px solid #999;
    height:20px;
    top:25px;
    width:25px
}
.tree li span {
    -moz-border-radius:5px;
    -webkit-border-radius:5px;
    border:1px solid #999;
    border-radius:5px;
    display:inline-block;
    padding:3px 8px;
    text-decoration:none
}
.tree li.parent_li>span {
    cursor:pointer
}
.tree>ul>li::before, .tree>ul>li::after {
    border:0
}
.tree li:last-child::before {
    height:30px
}
.tree li.parent_li>span:hover, .tree li.parent_li>span:hover+ul li span {
    background:#eee;
    border:1px solid #94a0b4;
    color:#000
}
</style>