escape path separator in lazy loader on windows

webpack/oskariLazyLoader.js

@@ -1,16 +1,24 @@
+const path = require('path');
+
 module.exports = function (source) {
     if (!this.query) {
         throw new Error('Param with bundle name must be given, eg. "import \'oskari-lazy-loader?bundlename!path/to/bundle.js\'"');
     }
     const name = this.query.slice(1);
+
     // resourcePath is the full path from root to file in the disk (atleast on WSL)
-    const parts = this.resourcePath.split('/node_modules/');
+    const axe = `${path.sep}node_modules${path.sep}`;
+    const parts = this.resourcePath.split(axe);
+
     // anything from oskari comes in parts[1], anything from app itself comes from parts[0] -> mobileuserguide in pti
     // import 'oskari-lazy-loader?metadatasearch!oskari-frontend/packages/catalogue/metadatasearch/bundle.js';
     // -> `oskari-loader!oskari-frontend/packages/catalogue/metadatasearch/bundle.js`
     // import 'oskari-lazy-loader?mobileuserguide!../../bundles/paikkatietoikkuna/mobileuserguide/bundle.js';
     // -> `oskari-loader!../../bundles/paikkatietoikkuna/mobileuserguide/bundle.js`
     const bundlePath = `oskari-loader!${parts.length === 1 ? parts[0] : parts[1]}`;
-
-    return `Oskari.bundle_manager.registerDynamic('${name}', function() {return import(/* webpackChunkName: "chunk_${name}" */ '${bundlePath}');});\n`;
+    let separatorReplaced = bundlePath;
+    if (path.sep === '\\') {
+        separatorReplaced = bundlePath.replaceAll(/\\/g, '\\\\');
+    }
+    return `Oskari.bundle_manager.registerDynamic('${name}', function() {return import(/* webpackChunkName: "chunk_${name}" */ '${separatorReplaced}');});\n`;
 };