1<div class="container">
2 <div class="item"></div>
3 <div class="break"></div> <!-- break -->
4 <div class="item"></div>
5</div>
6
7<style>
8 /* Inserting this collapsed row between two flex items will make
9 the flex item that comes after it break to a new row */
10 .break {
11 flex-basis: 100%;
12 height: 0;
13 }
14</style>
15