我如何从背面开始隐藏第n个元素

Question

我正在尝试隐藏从背面开始的nthdiv元素。使用：nth-last-child（n）选择器仅隐藏在DIV中而不是DIV本身内的最后一个元素。

我尝试了以下内容：

.block：nth-last-child（1）{display：none;}
以上没有做任何事情

.block：nth-last-child（1）{display：none;}
以上仅隐藏了div

中的第n个元素

.block:nth-last-child(1) {display:none;} 

<div class='block'>
    <button type="button">a</button>
    <button type="button">b</button>
    <button type="button">c</button>
</div>
<div class='block'>
    <button type="button">a</button>
    <button type="button">b</button>
    <button type="button">c</button>
</div>
<div class='block'>
    <button type="button">a</button>
    <button type="button">b</button>
    <button type="button">c</button>
</div>
<div class='block'>
    <button type="button">a</button>
    <button type="button">b</button>
    <button type="button">c</button>
</div>

Answer 1

.block:nth-last-child(2) {display:none;}

Answer 2

有" parent"元素才能拥有"孩子"

.block:nth-last-child(2) {display:none;} 

<div class='parent'>
<div class='block'>
    <button type="button">a0</button>
    <button type="button">b0</button>
    <button type="button">c0</button>
</div>
<div class='block'>
    <button type="button">a1</button>
    <button type="button">b1</button>
    <button type="button">c1</button>
</div>
<div class='block'>
    <button type="button">a2</button>
    <button type="button">b2</button>
    <button type="button">c2</button>
</div>
<div class='block'>
    <button type="button">a3</button>
    <button type="button">b3</button>
    <button type="button">c3</button>
</div>
</div>

Answer 3

您的选择器错了，您需要指定要选择按钮。

类似的东西：

.block button:last-child {display:none;}

<div class='block'>
    <button type="button">1a</button>
    <button type="button">1b</button>
    <button type="button">1c</button>
</div>
<div class='block'>
    <button type="button">2a</button>
    <button type="button">2b</button>
    <button type="button">2c</button>
</div>
<div class='block'>
    <button type="button">3a</button>
    <button type="button">3b</button>
    <button type="button">3c</button>
</div>
<div class='block'>
    <button type="button">4a</button>
    <button type="button">4b</button>
    <button type="button">4c</button>
</div>