如何垂直对齐较小的 material 浮动按钮?

How can I align vertically a smaller material float button?

我有以下代码来创建一些浮动按钮:

    <div class='history-buttons__container'>
        <button mat-mini-fab>all</button>
        <button mat-mini-fab>1y</button>
        <button mat-mini-fab>6m</button>
        <button mat-mini-fab>30d</button>
    </div>
.history-buttons__container > button{
    display: block;
    margin-bottom: .5rem;
    width: 2rem;
    height: 2rem;
}

产生以下结果:

如果我删除了宽度和高度,它们看起来还不错:

由于这些元素在 diplay: block 中以垂直堆叠,我不能使用 vertical-align。在缩小图标的同时如何使项目内的文本居中?

使用 flex,您可以轻松做到

.history-buttons__container {
    display:flex;
    flex-direction:column;
}
.history-buttons__container > button{
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: .5rem;
    width: 2rem;
    height: 2rem;
}
<div class='history-buttons__container'>
        <button mat-mini-fab>all</button>
        <button mat-mini-fab>1y</button>
        <button mat-mini-fab>6m</button>
        <button mat-mini-fab>30d</button>
    </div>