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If I’m understanding the issue right.
You want 4 columns lined up in a row?
You need to actually write 4 separate columns, for example.
<!--Start of Row-->
<div class="row">
<!--First Column-->
<div class="col-sm-3">
<card-bar :items="items"></card-bar>
</div>
<!--Second Column-->
<div class="col-sm-3">
<card-bar :items="items"></card-bar>
</div>
<!--Third Column-->
<div class="col-sm-3">
<card-bar :items="items"></card-bar>
</div>
<!--Fourth Column-->
<div class="col-sm-3">
<card-bar :items="items"></card-bar>
</div>
</div>
<!--End of Row-->
Source:stackexchange.com