e 'flex-grow' property is invalid when the flex container has no space distributed.">
<style>
  #container {
    background-color: red;
    display: flex;
    height: 100px;
    width: 100px;
  }
  #container div {
    height: 100px;
  }
  #test1 {
    flex-grow: 3;
    width: 50px;
  }
  #test2 {
    background-color: green;
    flex-grow: 2;
    width: 50px;
  }
  #cover {
    background-color: green;
    height: 100px;
    position: relative;
    top: -100px;
    width: 50px;
  }
</style>
<body>
  <p>Tes