Change number of columns depending on screen size

Question

I am experimenting with Bootstrap and I was wondering how can I adjust number of columns depending of screen size. I saw this from Bootstrap CSS tutorial:

<!-- Stack the columns on mobile by making one full-width and the other half-width -->
<div class="row">
  <div class="col-xs-12 col-md-8">.col-xs-12 .col-md-8</div>
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
</div>

<!-- Columns start at 50% wide on mobile and bump up to 33.3% wide on desktop -->
<div class="row">
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
  <div class="col-xs-6 col-md-4">.col-xs-6 .col-md-4</div>
</div>

<!-- Columns are always 50% wide, on mobile and desktop -->
<div class="row">
  <div class="col-xs-6">.col-xs-6</div>
  <div class="col-xs-6">.col-xs-6</div>
</div>

I have 6 columns on big screen size and I would like to switch it to two rows of 3 columns on medium screens and to three rows of 2 columns on small screens. It looks to me that I can only change width of columns and not number of columns. Can I do it with Bootstrap and if not what would be a good way to do it? Javascript?

Answer 1

Yes, you can change number of columns with Bootstrap. That's what flexible grid is for.

Here's an example that follows your instructions:

<div class="row">
  <div class="col-xs-6 col-md-4 col-lg-2">first</div>
  <div class="col-xs-6 col-md-4 col-lg-2">second</div>

  <div class="col-xs-6 col-md-4 col-lg-2">third</div>
  <div class="col-xs-6 col-md-4 col-lg-2">fourth</div>

  <div class="col-xs-6 col-md-4 col-lg-2">fifth</div>
  <div class="col-xs-6 col-md-4 col-lg-2">sixth</div>
</div>

See Bootply Demo.

Answer 2

<div class="row">
    <div class="col-lg-2 col-md-4 col-xs-6"></div>
    <div class="col-lg-2 col-md-4 col-xs-6"></div>
    <div class="col-lg-2 col-md-4 hidden-sm hidden-xs"></div>
    <div class="col-lg-2 hidden-md hidden-sm hidden-xs"></div>
    <div class="col-lg-2 hidden-md hidden-sm hidden-xs"></div>
    <div class="col-lg-2 hidden-md hidden-sm hidden-xs"></div>
</div>
<div class="row">
    <div class="hidden-lg col-md-4 col-xs-4"></div>
    <div class="hidden-lg col-md-4 col-xs-4"></div>
    <div class="hidden-lg col-md-4 hidden-sm hidden-xs"></div>
</div>
<div class="row">
    <div class="hidden-lg hidden-md col-xs-4"></div>
    <div class="hidden-lg hidden-md col-xs-4"></div>
</div>