Overview

Use responsive-friendly custom flex classes to build nested layouts with fixed and fluid columns. The classes are named using the format flex-{property}for xsand flex-{breakpoint}-{property}for sm, md, lg, xl, and xxl.

Where propertyis one of:

root- to define the root node of the flex layout(usually it's used when the layout is placed as a direct child of the body element in order to fully occupy the window height)
column-auto- to set a column with auto height
column-fluid- to set a column with fluid height
row-auto- to set a column with auto width
row-fluid- to set a column with fluid width
center- to set a column's content vertically and horizontally centered

Fixed Height

Fluid Height

Fixed Height

Fluid Width

Fixed Width

<div class="d-flex flex-row h-300px">
    <div class="d-flex flex-column flex-row-auto w-200px">
        <div class="d-flex flex-column-auto h-50px bg-primary">
            <span class="text-white">Fixed Height</span>
        </div>

        <div class="d-flex flex-column-fluid bg-success flex-center">
            <span class="text-white">Fluid Height</span>
        </div>
    </div>

    <div class="d-flex flex-column flex-row-fluid">
        <div class="d-flex flex-column-auto h-70px bg-info flex-center">
            <span class="text-white">Fixed Height</span>
        </div>

        <div class="d-flex flex-row flex-column-fluid">
            <div class="d-flex flex-row-fluid bg-dark flex-center">
                <span class="text-white">Fluid Width</span>
            </div>

            <div class="d-flex flex-row-auto w-200px bg-warning flex-center">
                <span class="text-white">Fixed Width</span>
            </div>
        </div>
    </div>
</div>