JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
</div>

CSS

body {
  overflow-x:hidden;
}

#container {
  background: linear-gradient(to bottom, lime, red);
  outline:25px solid #fff;
  border:25px solid #fff;
  width: calc(105vw + 2.5%);
  height: auto;
  display:block;
  overflow-x: hidden;
}

.box {
  border: 2px solid black;
  margin: 10px;
  width: 20%;
  height: 100px;
  float: left;
  background: transparent;
  outline: 20px solid #fff;
}

JavaScript

var container = document.getElementById("container");
      for (var i = 0; i < 2000; i++) {
        container.insertAdjacentHTML("beforeend", "<div class=box></div>");
      };