bootstrap5 .me-auto .ms-auto
bootstrap4 .ml-auto .mr-auto
先看css样式
bootstrap5
.ms-auto元素居右
.me-auto元素居左
.ms-auto{margin-left:auto!important}
.me-auto{margin-right:auto!important}
.mx-auto{margin-right:auto!important;margin-left:auto!important}
bootstrap4
.ml-auto元素居右
.mr-auto元素居左
.ml-auto,.mx-auto{margin-left:auto!important}
.mr-auto,.mx-auto{margin-right:auto!important}
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