The class fluid container does not have to be full. If you want, for example, add a background color that extends up to 100% of the width of the window. I suggest you make a wrapper div outside the liquid container:
<div style="width:100%; height: 600px; background-color: red;">
<div class="container-fluid">...</div>
</div>
- Bootstrap. , ! , .
OP , Bootstrap. div, . , div.