JSFiddle - React, Tailwind, and code Playground

HTML

<div class="flex-container">
  <div class="flex-child"></div>
  <div class="flex-child"></div>
  <div class="flex-child"></div>
  <div class="flex-child"></div>
  <div class="flex-child"></div>
  <div class="flex-child"></div>
  <div class="flex-child"></div>
</div>

CSS

.flex-container {
  display: flex;
  flex-flow: row wrap;
}

.flex-child {
  width: 100px;
  height: 100px;
  margin: 10px;
  border: 1px solid #000;
}

.flex-child {
  flex: 0 0 100px;
}