JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
  <div class="left"><span>lfjaslkjasldjfaljdfaldflasjflasjdfldasfsdafafasdfsdafadsfazxcvzvzxv</span>
</div>

CSS

.wrapper{
  width: 400px;
  height: 300px;
  border: solid 1px;
}

.wrapper .left{
  float: left;
  width: 200px;
  height: 200px;
  border: solid 1px;
  background-color: #111111
}

.wrapper span{
  word-wrap: break-word;
}