OpenStreetMap Reprojection with ScaleLine Control

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import Map from 'ol/Map.js';
import View from 'ol/View.js';
import {ScaleLine} from 'ol/control.js';
import TileLayer from 'ol/layer/Tile.js';
import {fromLonLat, transformExtent} from 'ol/proj.js';
import {register} from 'ol/proj/proj4.js';
import OSM from 'ol/source/OSM.js';
import proj4 from 'proj4';

proj4.defs('Indiana-East', 'PROJCS["IN83-EF",GEOGCS["LL83",DATUM["NAD83",' +
    'SPHEROID["GRS1980",6378137.000,298.25722210]],PRIMEM["Greenwich",0],' +
    'UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],' +
    'PARAMETER["false_easting",328083.333],' +
    'PARAMETER["false_northing",820208.333],' +
    'PARAMETER["scale_factor",0.999966666667],' +
    'PARAMETER["central_meridian",-85.66666666666670],' +
    'PARAMETER["latitude_of_origin",37.50000000000000],' +
    'UNIT["Foot_US",0.30480060960122]]');
register(proj4);

var map = new Map({
  layers: [
    new TileLayer({
      source: new OSM()
    })
  ],
  target: 'map',
  view: new View({
    projection: 'Indiana-East',
    center: fromLonLat([-85.685, 39.891], 'Indiana-East'),
    zoom: 7,
    extent: transformExtent([-172.54, 23.81, -47.74, 86.46],
      'EPSG:4326', 'Indiana-East'),
    minZoom: 6
  })
});

map.addControl(new ScaleLine({units: 'us'}));

<!DOCTYPE html>
<html>
  <head>
    <title>OpenStreetMap Reprojection with ScaleLine Control</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>

  </head>
  <body>
    <div id="map" class="map"></div>
    <script>
      import Map from 'ol/Map.js';
      import View from 'ol/View.js';
      import {ScaleLine} from 'ol/control.js';
      import TileLayer from 'ol/layer/Tile.js';
      import {fromLonLat, transformExtent} from 'ol/proj.js';
      import {register} from 'ol/proj/proj4.js';
      import OSM from 'ol/source/OSM.js';
      import proj4 from 'proj4';

      proj4.defs('Indiana-East', 'PROJCS["IN83-EF",GEOGCS["LL83",DATUM["NAD83",' +
          'SPHEROID["GRS1980",6378137.000,298.25722210]],PRIMEM["Greenwich",0],' +
          'UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],' +
          'PARAMETER["false_easting",328083.333],' +
          'PARAMETER["false_northing",820208.333],' +
          'PARAMETER["scale_factor",0.999966666667],' +
          'PARAMETER["central_meridian",-85.66666666666670],' +
          'PARAMETER["latitude_of_origin",37.50000000000000],' +
          'UNIT["Foot_US",0.30480060960122]]');
      register(proj4);

      var map = new Map({
        layers: [
          new TileLayer({
            source: new OSM()
          })
        ],
        target: 'map',
        view: new View({
          projection: 'Indiana-East',
          center: fromLonLat([-85.685, 39.891], 'Indiana-East'),
          zoom: 7,
          extent: transformExtent([-172.54, 23.81, -47.74, 86.46],
            'EPSG:4326', 'Indiana-East'),
          minZoom: 6
        })
      });

      map.addControl(new ScaleLine({units: 'us'}));
    </script>
  </body>
</html>