border-start

bootstrap5.css

bootstrap5.css
.border-start {
  border-left: 1px solid #dee2e6 !important;
}
bootstrap5.css
.border-start-0 {
  border-left: 0 !important;
}

html bootstrap5 Sample

ボーダーを追加する:!important


border border-top border-end border-bottom border-start
  <!-- 全辺ボーダー -->
  <span class="border">border</span>
  <!-- 上ボーダー -->
  <span class="border-top">border-top</span>
  <span class="border-end">border-end</span>
  <span class="border-bottom">border-bottom</span>
  <span class="border-start">border-start</span>

ボーダーを削除する:border-0


border-0 border-top-0 border-end-0 border-bottom-0 border-start-0
  <!-- 全ボーダー削除 -->
  <span class="border border-0">border-0</span>
  <span class="border border-top-0">border-top-0</span>
  <span class="border border-end-0">border-end-0</span>
  <span class="border border-bottom-0">border-bottom-0</span>
  <span class="border border-start-0">border-start-0</span>