In many projects, the function of grid display needs to be realized. There is a gray dividing line in the middle, but not on both sides.

As shown in the picture:

According to the general idea, set the width of li, and add style to li label by nth of type (n) {}.

Set the width of each Li to 33.33%, but when we add 1px border, the rightmost content will be squeezed down.

This can be achieved by adding the: before: after pseudo class element to the parent ul. Without occupying the width of li

When three columns are displayed, it is realized by adding: before to ul

CSS

<style>
        ul li{ list-style: none;}
        .mp-list{   
            position: relative;
            overflow: hidden;
            z-index: 0;
            background-color: #fff;
        }        
        .mp-list:before {
            content: '';
            position: absolute;
            width: 33.33%;
            left: 33.33%;
            height: 100%;
            border-left: .02rem solid #ddd;
            border-right: .02rem solid #ddd;
        }
        .mp-list li {
            width: 33.33%;
            height: 2rem;
            line-height: 2rem;
            font-size: .28rem;
            text-align: center;
            border-bottom: .02rem solid #ddd;
            margin-bottom: -1px;
            float: left;
            position: relative;
            z-index: 10;
            color: #212121;
        }
        .mp-list li a {
            color: #212121;
            display: block;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-size: .28rem;
        }
    </style>

HTML

<ul class="mp-list">
    <li><a hybrid-link="" href="" title="">Hong Kong</a></li>
    <li><a hybrid-link="" href="" title="">Macao</a></li>
    <li><a hybrid-link="" href="" title="">Taiwan</a></li>
    <li><a hybrid-link="" href="" title="">Bangkok</a></li>
    <li><a hybrid-link="" href="" title="">Singapore</a></li>
    <li><a hybrid-link="" href="" title="">Seoul</a></li>
    <li><a hybrid-link="" href="" title="">Tokyo</a></li>
    <li><a hybrid-link="" href="" title="">Chejudo</a></li>
    <li><a hybrid-link="" href="" title="">Ban Phatthaya</a></li>
</ul>

When four columns are displayed, add styles to: after, and note that you need to change the position of li's width,. MP list: before.

.mp-list:after {
    content: '';
    position: absolute;
    width: 10%;
    left: 75%;
    height: 100%;
    border-left: .02rem solid #ddd;
    border-right: 0;
}