Fix custom proj examples in minified mode

Author: gberaudo

examples/customProj.js

@@ -10,26 +10,23 @@ goog.require('ol.layer.Image');
 goog.require('ol.layer.Tile');
 goog.require('ol.Map');
 goog.require('ol.proj');
-goog.require('ol.proj.proj4');
 
-if (typeof ol.proj.proj4.get() == 'function') {
-  const epsg21781def = [
-    '+proj=somerc',
-    '+lat_0=46.95240555555556',
-    '+lon_0=7.439583333333333',
-    '+k_0=1',
-    '+x_0=600000',
-    '+y_0=200000',
-    '+ellps=bessel',
-    '+towgs84=674.374,15.056,405.346,0,0,0,0',
-    '+units=m',
-    '+no_defs'
-  ].join(' ');
-  const epsg21781extent = [420000, 30000, 900000, 350000];
+const epsg21781def = [
+  '+proj=somerc',
+  '+lat_0=46.95240555555556',
+  '+lon_0=7.439583333333333',
+  '+k_0=1',
+  '+x_0=600000',
+  '+y_0=200000',
+  '+ellps=bessel',
+  '+towgs84=674.374,15.056,405.346,0,0,0,0',
+  '+units=m',
+  '+no_defs'
+].join(' ');
+const epsg21781extent = [420000, 30000, 900000, 350000];
 
-  ol.proj.proj4.get().defs('EPSG:21781', epsg21781def);
-  ol.proj.get('EPSG:21781').setExtent(epsg21781extent);
-}
+proj4.defs('EPSG:21781', epsg21781def);
+ol.proj.get('EPSG:21781').setExtent(epsg21781extent);
 
 const customProjSource = new ol.source.ImageWMS({
   attributions: '© <a href="http://www.geo.admin.ch/internet/geoportal/' +