Dynamic center div bootstrap

Question

I'm trying to create a responsive div list

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

<div class="container">
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
</div>

As you can see, from above i have four divs and when i only have 3 divs, they will in left

Is it possible do it dynamically when there is only 3 div and they will be centered ?

If yes, how can i do that. Thanks in advance and sorry for my bad english

Answer 1

To test, try removing a column.

For All Resolutions:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

<div class="container">
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
</div>
<style>
 .col-xs-6:first-child:nth-last-child(3),
 .col-xs-6:first-child:nth-last-child(3) ~ .col-xs-6 {
     width: 33.3%;
 }
</style>

For Mobile Resolution Only:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

<div class="container">
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
  <div class="col-lg-3 col-md-3 col-sm-6 col-xs-6">
    <a href="#">
      <img src="https://dummyimage.com/250x250/000/fff">
    </a>
  </div>
</div>
<style>
@media (max-width:767px) {
  .col-xs-6:first-child:nth-last-child(3),
  .col-xs-6:first-child:nth-last-child(3) ~ .col-xs-6 {
      width: 33.3%;
  }
}
</style>

Explanation:

`.col-xs-6:first-child:nth-last-child(3)`

For The column that is the first column, and also the 3rd from the last column

, .col-xs-6:first-child:nth-last-child(3) ~ .col-xs-6

and for all adjacent siblings of said column (every column that comes after)

width: 33.3%;

take up 1/3 of the width.

If there are 4 or more columns, or less than 3 columns, the first child can't be 3rd from the last, so we only change the width when it's 3. No flexbox needed (although I love flexbox), no polyfills needed, no bs.