Flutter Web Project Loading Animation Change

In flutter web, the default loading screen has only white space. it’s not very user-friendly. so we can add some loading spinner for the screen by changing ‘web/index.html’ in our flutter project folder.

index.html header

<style>
body {background-color: #212121;}

  .loading {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
  }

  .loader {
    border: 16px solid #f3f3f3;
    border-radius: 50%;
    border: 15px solid;
    border-top: 16px solid #FFFFFF;
    border-right: 16px solid #212121;
    border-bottom: 16px solid #FFFFFF;
    border-left: 16px solid #212121;
    width: 120px;
    height: 120px;
    -webkit-animation: spin 2s linear infinite;
    animation: spin 2s linear infinite;
  }

  @-webkit-keyframes spin {
    0% {
      -webkit-transform: rotate(0deg);
    }
    100% {
      -webkit-transform: rotate(360deg);
    }
  }

  @keyframes spin {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
  }
</style>

index.html body

<div class="loading">
  <div class="loader"></div>
</div>
<script src="main.dart.js" type="application/javascript"></script>

Still, have a problem? check my You tube video.