圆形角桌与LESS

Question

经过一些挖掘后,我发现这是我需要为桌子设置圆角的最佳响应.

这引出了我以下的CSS片段:

.greytable tr:first-child th:first-child {
    -moz-border-radius-topleft: 5px;
    -webkit-border-top-left-radius: 5px;
    border-top-left-radius: 5px;
}

.greytable tr:first-child th:last-child {
    -moz-border-radius-topright: 5px;
    -webkit-border-top-right-radius: 5px;
    border-top-right-radius: 5px;
}

.greytable tr:last-child td:first-child {
    -moz-border-radius-bottomleft: 5px;
    -webkit-border-bottom-left-radius: 5px;
    border-bottom-left-radius: 5px;
}

.greytable tr:last-child td:last-child {
    -moz-border-radius-bottomright: 5px;
    -webkit-border-bottom-right-radius: 5px;
    border-bottom-right-radius: 5px;
}

现在我想知道如何用LESS简化所有这些.我尝试了以下LESS代码:

.border-radius (@v, @h, @radius: 5px) {
    -moz-border-radius-@v@h: @radius;
    -webkit-border-@v-@h: @radius;
    border-@v-@h: @radius;
}

然后调用它(左上角):

.greytable tr:first-child th:first-child {
    .border-radius('top', 'left')
}

但它不起作用(LESS片段的第二行出错).

提前致谢!

Answer 1

您可能需要使用字符串插值语法,请尝试以下方法:

.border-radius (@v, @h, @radius: 5px) {
    -moz-border-radius-@{v}@{h}: @radius;
    -webkit-border-@{v}-@{h}-radius: @radius;
    border-@{v}-@{h}-radius: @radius;
}

我还要补充说,webkit和mozilla在很大程度上符合标准border-radius属性,并且供应商前缀已经过时了.

编辑:似乎字符串插值不适用于此任务(上面的代码将无法编译),所以这是一个实际上更容易使用的解决方法mixin:

.rounded-table(@radius) {
    tr:first-child th:first-child {
        -moz-border-radius-topleft: @radius;
        -webkit-border-top-left-radius: @radius;
        border-top-left-radius: @radius;
    }
    tr:first-child th:last-child {
        -moz-border-radius-topright: @radius;
        -webkit-border-top-right-radius: @radius;
        border-top-right-radius: @radius;
    }
    tr:last-child td:first-child {
        -moz-border-radius-bottomleft: @radius;
        -webkit-border-bottom-left-radius: @radius;
        border-bottom-left-radius: @radius;
    }
    tr:last-child td:last-child {
        -moz-border-radius-bottomright: @radius;
        -webkit-border-bottom-right-radius: @radius;
        border-bottom-right-radius: @radius;
    }
}

用法:

.greytable {
    .rounded-table(10px)
}

输出:

.greytable tr:first-child th:first-child {
  -moz-border-radius-topleft: 10px;
  -webkit-border-top-left-radius: 10px;
  border-top-left-radius: 10px;
}
.greytable tr:first-child th:last-child {
  -moz-border-radius-topright: 10px;
  -webkit-border-top-right-radius: 10px;
  border-top-right-radius: 10px;
}
.greytable tr:last-child td:first-child {
  -moz-border-radius-bottomleft: 10px;
  -webkit-border-bottom-left-radius: 10px;
  border-bottom-left-radius: 10px;
}
.greytable tr:last-child td:last-child {
  -moz-border-radius-bottomright: 10px;
  -webkit-border-bottom-right-radius: 10px;
  border-bottom-right-radius: 10px;
}