Почему не работает order bootstrap и блоки остаются в том же положении в каком были изначально?
<div class="row">
<div class="col-md-4 order-md-1">
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/customize.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/time.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/music.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
</div>
<div class="col-md-4 order-md-3">
<img class="img-fluid img-rounded" src="img/phone.png">
</div>
<div class="col-md-4 order-md-2">
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/support.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc_a">
<img class="align-self-start mr-3" src="img/icon/send.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/camera.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
</div>
</div>
Для md экранов все работает верно. Другое дело, если вы хотите, чтобы этот порядок работал на всех ширинах, уберите префикс:
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
<div class="row">
<div class="col-md-4 order-1">
Порядок-1 Order-1
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/customize.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/time.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/music.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
</div>
<div class="col-md-4 order-3">
Порядок-2 Order-3
<img class="img-fluid img-rounded" src="img/phone.png">
</div>
<div class="col-md-4 order-2">
Порядок-3 Order-2
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/support.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc_a">
<img class="align-self-start mr-3" src="img/icon/send.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
<div class="media af_spc">
<img class="align-self-start mr-3" src="img/icon/camera.png" alt="Generic placeholder image">
<div class="media-body">
<h5 class="mt-0">Accusan timar</h5>
<p class="h4block2">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantiu</p>
</div>
</div>
</div>
</div>
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