JSFiddle - React, Tailwind, and code Playground

HTML

<div class="gridContainer">
  <div class="child grid">A</div>
  <div class="child grid">AB</div>
  <div class="child grid">ABC</div>
  <div class="child grid">ABCD</div>
  <div class="child grid">ABCDE</div>
</div>

<div class="flexContainer">
  <div class="child flex">A</div>
  <div class="child flex">AB</div>
  <div class="child flex">ABC</div>
  <div class="child flex">ABCD</div>
  <div class="child flex">ABCDE</div>
</div>

CSS

.gridContainer {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 200px));
  padding: 10px;
  gap: 10px;
  justify-items: center;
  justify-content: center;
}

.child {
  height: 30px;
  background: #0f0;
  text-align: center;
}

.child.grid {
  width: 100%;
}

.child.flex {
  min-width: 100px;
  max-width: 200px;
  flex: 1 1 0;
  margin: 0 5px 10px;
}

.flexContainer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}