Boostrap今天提供了用内置类均匀填充一行的可能性，这些内置类不告诉十二列中有多少列要跨度:

你可以使用col/col-xx:

div div div { border: solid; margin: 2px;/* this can be added without breaking the row */ } div div div:before { content:attr(class);/* show class used */ color:crimson <link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" /> <p>Class used , play snippet in full page to test behavior on resizing :</p> <div class="container"> <div class="row"> <div class="col-sm"></div> <div class="col-sm"></div> <div class="col-sm"></div> <div class="col-sm"></div> <div class="col-sm"></div> </div> <div class="row"> <div class="col-md"></div> <div class="col-md"></div> <div class="col-md"></div> <div class="col-md"></div> <div class="col-md"></div> </div> <div class="row"> <div class="col"></div> <div class="col"></div> <div class="col"></div> <div class="col"></div> <div class="col"></div> </div> </div>

Flex-grow-x也可以使用

div div div { border: solid; /* it allows margins too */ margin: 3px; } div div div:before { content: attr(class); /* show class used */ color: crimson } <link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" /> <div class="container"> <div class="row"> <div class="flex-grow-1"></div> <div class="flex-grow-1"></div> <div class="flex-grow-1"></div> <div class="flex-grow-1"></div> <div class="flex-grow-1"></div> </div> </div>

一个解决方案，不需要大量的CSS，也不调整bootstrap默认12col布局:

http://jsfiddle.net/0ufdyeur/1/

HTML:

<div class="stretch">
  <div class="col-lg-2"></div>
  <div class="col-lg-2"></div>
  <div class="col-lg-2"></div>
  <div class="col-lg-2"></div>
  <div class="col-lg-2"></div>
</div>

CSS:

@media (min-width: 1200px) { /*if not lg, change this criteria*/
  .stretch{
    width: 120%; /*the actual trick*/
  }
}

有人使用bootstrap-sass (v3)，下面是使用bootstrap混合的5列的简单代码:

  .col-xs-5ths {
     @include make-xs-column(2.4);
  }

  @media (min-width: $screen-sm-min) {
     .col-sm-5ths {
        @include make-sm-column(2.4);
     }
  }

  @media (min-width: $screen-md-min) {
     .col-md-5ths {
        @include make-md-column(2.4);
     }
  }

  @media (min-width: $screen-lg-min) {
     .col-lg-5ths {
        @include make-lg-column(2.4);
     }
  }

确保你已经包括:

@import "bootstrap/variables";
@import "bootstrap/mixins";

如果使用bootstrap 4和SASS (+ bootstrap变量)，您可以使用以下简化的答案:

@each $breakpoint in map-keys($grid-breakpoints) {
  $infix: breakpoint-infix($breakpoint, $grid-breakpoints);

  .col#{$infix}-fifth {
    @extend %grid-column;
  }

  @include media-breakpoint-up($breakpoint, $grid-breakpoints) {
    .col#{$infix}-fifth {
      flex: 0 0 20%;
      max-width: 20%;
    }
  }
}

还支持断点，您可以简单地添加新的.col#{$infix}-xxx类

用于引导4.4+

使用全新的row-cols-n类。

添加row-cols-5类到你的.row div。不需要自定义CSS。 参见4.4文档中的row-cols: https://getbootstrap.com/docs/4.4/layout/grid/#row-columns

对于引导4.4之前的引导4版本

Copy CSS below (awesome CSS by Bootstrap authors) and add it to your project Read the docs cited above to use it correctly. .row-cols-1>*{-ms-flex:0 0 100%;flex:0 0 100%;max-width:100%}.row-cols-2>*{-ms-flex:0 0 50%;flex:0 0 50%;max-width:50%}.row-cols-3>*{-ms-flex:0 0 33.333333%;flex:0 0 33.333333%;max-width:33.333333%}.row-cols-4>*{-ms-flex:0 0 25%;flex:0 0 25%;max-width:25%}.row-cols-5>*{-ms-flex:0 0 20%;flex:0 0 20%;max-width:20%}.row-cols-6>*{-ms-flex:0 0 16.666667%;flex:0 0 16.666667%;max-width:16.666667%}@media (min-width:576px){.row-cols-sm-1>*{-ms-flex:0 0 100%;flex:0 0 100%;max-width:100%}.row-cols-sm-2>*{-ms-flex:0 0 50%;flex:0 0 50%;max-width:50%}.row-cols-sm-3>*{-ms-flex:0 0 33.333333%;flex:0 0 33.333333%;max-width:33.333333%}.row-cols-sm-4>*{-ms-flex:0 0 25%;flex:0 0 25%;max-width:25%}.row-cols-sm-5>*{-ms-flex:0 0 20%;flex:0 0 20%;max-width:20%}.row-cols-sm-6>*{-ms-flex:0 0 16.666667%;flex:0 0 16.666667%;max-width:16.666667%}}@media (min-width:768px){.row-cols-md-1>*{-ms-flex:0 0 100%;flex:0 0 100%;max-width:100%}.row-cols-md-2>*{-ms-flex:0 0 50%;flex:0 0 50%;max-width:50%}.row-cols-md-3>*{-ms-flex:0 0 33.333333%;flex:0 0 33.333333%;max-width:33.333333%}.row-cols-md-4>*{-ms-flex:0 0 25%;flex:0 0 25%;max-width:25%}.row-cols-md-5>*{-ms-flex:0 0 20%;flex:0 0 20%;max-width:20%}.row-cols-md-6>*{-ms-flex:0 0 16.666667%;flex:0 0 16.666667%;max-width:16.666667%}}@media (min-width:992px){.row-cols-lg-1>*{-ms-flex:0 0 100%;flex:0 0 100%;max-width:100%}.row-cols-lg-2>*{-ms-flex:0 0 50%;flex:0 0 50%;max-width:50%}.row-cols-lg-3>*{-ms-flex:0 0 33.333333%;flex:0 0 33.333333%;max-width:33.333333%}.row-cols-lg-4>*{-ms-flex:0 0 25%;flex:0 0 25%;max-width:25%}.row-cols-lg-5>*{-ms-flex:0 0 20%;flex:0 0 20%;max-width:20%}.row-cols-lg-6>*{-ms-flex:0 0 16.666667%;flex:0 0 16.666667%;max-width:16.666667%}}@media (min-width:1200px){.row-cols-xl-1>*{-ms-flex:0 0 100%;flex:0 0 100%;max-width:100%}.row-cols-xl-2>*{-ms-flex:0 0 50%;flex:0 0 50%;max-width:50%}.row-cols-xl-3>*{-ms-flex:0 0 33.333333%;flex:0 0 33.333333%;max-width:33.333333%}.row-cols-xl-4>*{-ms-flex:0 0 25%;flex:0 0 25%;max-width:25%}.row-cols-xl-5>*{-ms-flex:0 0 20%;flex:0 0 20%;max-width:20%}.row-cols-xl-6>*{-ms-flex:0 0 16.666667%;flex:0 0 16.666667%;max-width:16.666667%}}

.col-xs-2-4 { position: relative; float: left; width: 20%; min-height: 1px; padding-left: 15px; padding-right: 15px; } .col-sm-2-4 { position: relative; min-height: 1px; padding-left: 15px; padding-right: 15px; } @media (min-width: 768px) { .col-sm-2-4 { float: left; width: 20%; } } .col-md-2-4 { position: relative; min-height: 1px; padding-left: 15px; padding-right: 15px; } @media (min-width: 992px) { .col-md-2-4 { float: left; width: 20%; } } .col-lg-2-4 { position: relative; min-height: 1px; padding-left: 15px; padding-right: 15px; } @media (min-width: 1200px) { .col-lg-2-4 { float: left; width: 20%; } }