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                #### 1.6 占位符%placeholder **注意:開頭是以%開始,不是用點號(.)。用占位符%聲明的代碼,在不被@extend調用的情況下,編譯成css時是不會產生任何代碼的** 列:scss樣式 ~~~ %mt5 { margin-top: 5px; } %pt5{ padding-top: 5px; } .btn { @extend %mt5; @extend %pt5; } .block { @extend %mt5; span { @extend %pt5; } } ~~~ 轉化成css樣式 ~~~ .btn, .block { margin-top: 5px; } .btn, .block span { padding-top: 5px; } ~~~ **有時占位符不是寫在開頭,而是寫在其他的位置。** 列2 scss樣式 ~~~ #meng %long a { color: blue; font-weight: bold; font-size: 2em; } .notice { @extend %long; } ~~~ 轉化成css樣式 ~~~ #meng .notice a { color: blue; font-weight: bold; font-size: 2em; } ~~~ 列3:scss樣式 ~~~ #meng a %long { color: blue; font-weight: bold; font-size: 2em; } .notice { @extend %long; //轉化成則是把上面的%long換成.notice } ~~~ 轉化成css樣式 ~~~ #meng a .notice { color: blue; font-weight: bold; font-size: 2em; } ~~~
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