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zerokira
Asked: 2020-09-07 06:59:32 +0800 CST 2020-09-07 06:59:32 +0800 CST

css中伪元素::before和::after的问题

  • 772

问候，我正在尝试将使用伪元素:Before和:aftercss 制作的箭头居中，但我找不到如何解决我的问题，想法是箭头以div包含它的箭头为中心，并且箭头不管数字多少都不会改变位置。我仍然注意制作这种类型的箭头的任何建议。

.container1 {
    color: #727176;
    background-color: #fff;
    position: absolute;
    padding: 6px;
    font-style: normal;
    font-weight: bold;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.23), 0 3px 12px rgba(0, 0, 0, 0.16);
    cursor: pointer;
}

.container1::before {
    content: "";
    position: absolute;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.23), 0 3px 12px rgba(0, 0, 0, 0.16);
    width: 19px;
    height: 19px;
    left: 26px;
    top: 19px;
    z-index: -1;
    transform: rotate(45deg);
    cursor: pointer;
}

.container1::after {
    content: "";
    top: 30px;
    left: 24px;
    position: absolute;
    height: 20px;
    border-left: 11px solid transparent;
    border-right: 11px solid transparent;
    border-top: 12px solid white;
    cursor: pointer;
}
<div class="container1" style="top: 60px;">
    <span>$990,000,000,000</span>
</div>
<div class="container1">
    <span>$990,000</span>
</div>

html

1 Answers

  1. Best Answer

    我很快想到，用 50% 作为参考并减去“箭头”占据的宽度的一半，这将是一个很好的选择来calc()改变左侧的位置。left当然会有一些小的调整等待，但这个想法体现在下面：

    .container1 {
    color: #727176;
    background-color: #fff;
    position: absolute;
    padding: 6px;
    font-style: normal;
    font-weight: bold;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.23), 0 3px 12px rgba(0, 0, 0, 0.16);
    cursor: pointer;
}

.container1::before {
    content: "";
    position: absolute;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.23), 0 3px 12px rgba(0, 0, 0, 0.16);
    width: 19px;
    height: 19px;
    left: calc(50% - 10px);
    top: 19px;
    z-index: -1;
    transform: rotate(45deg);
    cursor: pointer;
}

.container1::after {
    content: "";
    top: 30px;
    left: calc(50% - 11px);
    position: absolute;
    height: 20px;
    border-left: 11px solid transparent;
    border-right: 11px solid transparent;
    border-top: 12px solid white;
    cursor: pointer;
}
    <div class="container1" style="top: 60px;">
    <span>$990,000,000,000</span>
</div>
<div class="container1">
    <span>$990,000</span>
</div>

    • 4