index.html

<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="./index.less" />
    <link
      rel="stylesheet"
      href="https://unpkg.com/leaflet@1.5.1/dist/leaflet.css"
      integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ=="
      crossorigin=""
    />
    <title>Rainfall Data</title>
    <link rel="icon" type="image/png" href="./src/icons/favi.png" />
  </head>

  <body>
    <div id="app"></div>
    <script src="./index.js"></script>
  </body>
</html>