我正在尝试避免“ class'itis”,并利用SASS嵌套来实现以下CSS输出:
a[class^="utility-button"], a[class*=" utility-button"] { //some shared css rules}
.utility-button-one {//some unique css rules}
.utility-button-two {//some unique css rules}
这就是我想要做的(我目前正在尝试的):
a[class^="utility-button"], a[class*=" utility-button"] {
//some shared css rules
&-one {
//some unique css rules
}
&-two {
//some unique css rules
}
}
现在我知道,如果将其编译,从技术上将输出的内容是:
a[class^="utility-button"], a[class*=" utility-button"] { //some shared css rules}
a[class^="utility-button"]-one {//some unique css rules}
a[class^="utility-button"]-two {//some unique css rules}
a[class*=" utility-button"]-one {//some unique css rules}
a[class*=" utility-button"]-two {//some unique css rules}
这显然是行不通的。
有没有办法解决这个问题-不必在<a>
我希望根据第二个类继承实用程序按钮样式的每个标签上添加两个类,真是太棒了。
父选择器不能以这种方式使用,它仅包含对前一个选择器的引用。Sass无法将属性选择器的内容作为目标(至少,不在当前可用的任何字符串操作功能之外)。
最好的办法是编写自定义函数或使用具有内容感知能力的mixin来为您做变量的肮脏工作。这是一个mixin版本的样子(假设您想继续使用嵌套):
@mixin my-sel($append: false) {
$class: if($append, selector-append(&, $append), &);
@at-root a[class^="#{$class}"], a[class*=" #{$class}"] {
@content;
}
}
utility-button {
@include my-sel {
/* some shared css rules */
}
@include my-sel(-one) {
/* some unique css rules */
}
@include my-sel(-two) {
/* some unique css rules */
}
}
输出:
a[class^="utility-button"], a[class*=" utility-button"] {
/* some shared css rules */
}
a[class^="utility-button-one"], a[class*=" utility-button-one"] {
/* some unique css rules */
}
a[class^="utility-button-two"], a[class*=" utility-button-two"] {
/* some unique css rules */
}
如果您需要将其嵌套到其他选择器中,那么它将变得更加复杂:
@function class-to-attribute-selector($class) {
// the following line is completely optional, but you definitely need the @return
$class: if(str-index($class, '.') == 1, str-slice($class, 2), $class);
@return #{'[class^="#{$class}"]'}, #{'[class*=" #{$class}"]'};
}
@mixin class-sel {
$sel-list: &;
$new-sel: ();
@each $sel in $sel-list {
@if length($sel) > 1 {
$s: ();
@for $i from 1 to length($sel) {
$s: append($s, nth($sel, $i));
}
$class: nth($sel, length($sel));
$new-sel: append($new-sel, selector-nest($s, class-to-attribute-selector($class)));
} @else {
$new-sel: join($new-sel, class-to-attribute-selector(nth($sel, 1)));
}
}
@at-root #{$new-sel} {
@content;
}
}
.foo {
.utility-button {
@include class-sel {
/* some shared css rules */
}
&-one {
@include class-sel {
/* some unique css rules */
}
}
&-two {
@include class-sel {
/* some unique css rules */
}
}
}
}
.bar {
@include class-sel {
/* other rules */
}
}
输出:
.foo [class^="utility-button"], .foo [class*=" utility-button"] {
/* some shared css rules */
}
.foo [class^="utility-button-one"], .foo [class*=" utility-button-one"] {
/* some unique css rules */
}
.foo [class^="utility-button-two"], .foo [class*=" utility-button-two"] {
/* some unique css rules */
}
[class^="bar"], [class*=" bar"] {
/* other rules */
}
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