html - 使用 css 选择器 lastchild 和 :after together in angular2

Question

HTML:

<h2 class="title-main">
     <span class="title-inside">A</span>
     <span class="title-inside">B</span>
     <span class="title-inside">C</span>
     <span class="title-inside">D</span>
     <span class="title-inside">E</span>
     <span class="title-outside">F</span>
     <span class="title-outside">G</span>
</h2>

CSS:

:host/deep/.title-main {
    display: flex;
    margin-bottom: 0;

    .title-inside {
        &:after {
            content : '-';
        }
    }
}

我得到这样的输出

A-B-C-D-E-F G

我不想要最后一个 child 的 - 。我想要这样的输出

A-B-C-D-E F G

我尝试了很多选择。例如。其中一个我试过

title-inside:last-child ::after {
           content: ''
    }

但这行不通。谁能帮帮我

Answer 1

使用 :not 和 :nth-last-of-type()

.title-main {
  display: flex;
  margin-bottom: 0;
}

.title-inside:not(:nth-last-of-type(3))::after {
  content: '-';
}

<h2 class="title-main">
  <span class="title-inside">A</span>
  <span class="title-inside">B</span>
  <span class="title-inside">C</span>
  <span class="title-inside">D</span>
  <span class="title-inside">E</span>
  <span class="title-outside">F</span>
  <span class="title-outside">G</span>
</h2>

这是 SASS version

:host/deep/.title-main {
    display: flex;
    margin-bottom: 0;

    .title-inside {
        &:not(:nth-last-of-type(3)){
           &::after{
            content : '-';
           }
        }
    }
}