【做下拉菜单时，发现下拉菜单的宽度会继承row的宽度 _属性】

做下拉菜单时，发现下拉菜单的宽度会继承row的宽度

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属性

详细描述

截图

代码

/* 第二行右侧下拉选框  */

.down-line {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.down-line button {
    display: inline-flex;
    align-items: center;
    width: 1.27rem;
    height: .37rem;
    border: 1px solid #f2f2f2;
    font-size: .14rem;
    color: #999999;
    background-color: #ffffff;
    outline: none;
}

/* 右侧下拉图标 */

.down-box {
    display: inline-block;
    width: .24rem;
    height: .28rem;
    margin-left: .25rem;
    border-radius: .05rem;
    background: #1d7ad9;
}

.down-box::after {
    content: "";
    position: absolute;
    margin-top: 0.08rem;
    margin-left: -.07rem;
    border-left: .07rem solid transparent;
    border-right: .07rem solid transparent;
    border-top: .12rem solid #ffffff;
}

/*下拉菜单*/

#downlist {
    position: absolute;
    margin: 0;
    padding: 0;
    top: 100%;
    z-index: 1000;
    display: none;
    width: 1.27rem;
    height: 100%;
    list-style: none;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, .15);
}

#downlist.show {
    display: flex;
    justify-content: center;
    align-items: center;
}

#downlist li a {
    display: block;
    padding: 0;
    clear: both;
    color: #212529;
    font-size: .14rem;
    text-decoration: none;
}
html代码
<div class="col-md-3 col-sm-12 view-details">
                    <div class="down-line">
                        <button data-toggle="collapse" data-target="#downlist2">
                            查看详情
                            <span class="down-box"></span>
                        </button>
                        <ul id="downlist2" class="collapse">
                            <li>
                                <a class="" href="#">xxxx</a>
                            </li>
                        </ul>
                    </div>
                </div>

编辑于2024-04-17