線上書籍

一、Border

1. 範例：https://webugm.github.io/bootstrap4/border.html
2. 增加 <span class="border"></span> <span class="border-top"></span> <span class="border-right"></span> <span class="border-bottom"></span> <span class="border-left"></span>

    

3. 減少 <span class="border-0"></span> <span class="border-top-0"></span> <span class="border-right-0"></span> <span class="border-bottom-0"></span> <span class="border-left-0"></span>

    

二、邊框色彩

1. 透過通用類別套用邊框的主題色彩 <span class="border border-primary"></span> <span class="border border-secondary"></span> <span class="border border-success"></span> <span class="border border-danger"></span> <span class="border border-warning"></span> <span class="border border-info"></span> <span class="border border-light"></span> <span class="border border-dark"></span> <span class="border border-white"></span>

    

三、Border-radius

1. 對一個元素增加 class 以方便的使其角部變圓 <img src="..." alt="..." class="rounded"> <img src="..." alt="..." class="rounded-top"> <img src="..." alt="..." class="rounded-right"> <img src="..." alt="..." class="rounded-bottom"> <img src="..." alt="..." class="rounded-left"> <img src="..." alt="..." class="rounded-circle"> <img src="..." alt="..." class="rounded-0">