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                `@each`?循環絕對是Sass提供的三個循環方式中最常用的。它提供了一個簡潔的 API 來迭代列表或 map。 ~~~ @each $theme in $themes { .section-#{$theme} { background-color: map-get($colors, $theme); } } ~~~ 當迭代一個 map 時,通常使用?`$key`?和?`$value`?作為變量名稱來確保一致性。 ~~~ @each $key, $value in $map { .section-#{$key} { background-color: $value; } } ~~~ 同時遵守下述規則,確保可讀性: * `each`?前添加空行; * 除非下一行是右閉大括號(`}`),否則在所有右閉大括號(`}`)后面添加新行。
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