var cols = $(".container .item").length;
if (cols == 5){
    $('div.item').removeClass('col-md-2..etc').addClass('col-md-3').css('width', '20%');
 }

Jquery和完成!框架!

var cols = $(".container .item").length;
if (cols == 5){
    $('div.item').removeClass('col-md-2..etc').addClass('col-md-3').css('width', '20%');
 }

Jquery和完成!框架!

最好的方法

只在行中添加.row-cols-5类。每一行有5个div。

<div class="container-fluid">
    <div class="row row-cols-5">
        <div class="col">1</div>
        <div class="col">2</div>
        <div class="col">3</div>
        <div class="col">4</div>
        <div class="col">5</div>
        <div class="col">6</div>
        <div class="col">7</div>
        <div class="col">8</div>
        <div class="col">9</div>
        <div class="col">10</div>
    </div>
</div>

使用响应式.row-cols-*类快速设置最能呈现内容和布局的列数。普通的.col-*类应用于单个列(例如，.col-md-4)，而行列类在父.row上设置为快捷方式。

row-cols - * row-cols-sm - * row-cols-md - * row-cols-lg - * row-cols-xl - *

你也可以使用附带的Sass mixin, row-cols():

.element {
  // Three columns to start
  @include row-cols(3);

  // Five columns from medium breakpoint up
  @include media-breakpoint-up(md) {
    @include row-cols(5);
  }
}

它可以通过嵌套和使用一点css覆盖来完成。

<div class="col-sm-12">
<div class="row">
  <div class="col-sm-7 five-three">
    <div class="row">
      <div class="col-sm-4">
      Column 1
      </div>
      <div class="col-sm-4">
      Column 2
      </div>
      <div class="col-sm-4">
      Column 3
      </div><!-- end inner row -->
    </div>
  </div>
  <div class="col-sm-5 five-two">
    <div class="row">
      <div class="col-sm-6">
        Col 4
      </div>
      <div class="col-sm-6">
      Col 5
      </div>
    </div><!-- end inner row -->
  </div>
</div>​<!-- end outer row -->

然后是css

@media  (min-width: 768px) {
div.col-sm-7.five-three {
width: 60% !important;
}

div.col-sm-5.five-two {
width: 40% !important;
}

}

下面是一个例子:5等列的例子

这是我写的关于代码墙的全部内容

在bootstrap 3中有5个相等的列

在bootstrap v4.3.1中，它是一个12 / 5 = 2.4列宽的列。我们称它为col-2dot4(以及col-sm-2dot4, col-md-2dot4，…)

每一列应该有20%的可用空间。

SCSS代码如下所示:

@mixin make-5-grid-column($columns: $grid-columns, $gutter: $grid-gutter-width, $breakpoints: $grid-breakpoints) {

  // Common properties for all breakpoints
  %grid-column {
    position: relative;
    width: 100%;
    padding-right: $gutter / 2;
    padding-left: $gutter / 2;
  }

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

    .col#{$infix}-2dot4 {
      @extend %grid-column;
    }

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

    @include media-breakpoint-up($breakpoint, $breakpoints) {

      // Provide basic `.col-{bp}` classes for equal-width flexbox columns
      .col#{$infix} {
        flex-basis: 0;
        flex-grow: 1;
        max-width: 100%;
      }

      .col#{$infix}-auto {
        flex: 0 0 auto;
        width: auto;
        max-width: 100%; // Reset earlier grid tiers
      }


      .col#{$infix}-2dot4 {
        @include make-col(1, 5);
      }
    }
  }
}

@if $enable-grid-classes {
  @include make-5-grid-column();
}

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";