flow like the river

VISUALIZACION/node_modules/parcel-bundler/lib/builtins/loaders/js-loader.js

@@ -0,0 +1,20 @@
+module.exports = function loadJSBundle(bundle) {
+  return new Promise(function (resolve, reject) {
+    var script = document.createElement('script');
+    script.async = true;
+    script.type = 'text/javascript';
+    script.charset = 'utf-8';
+    script.src = bundle;
+    script.onerror = function (e) {
+      script.onerror = script.onload = null;
+      reject(e);
+    };
+
+    script.onload = function () {
+      script.onerror = script.onload = null;
+      resolve();
+    };
+
+    document.getElementsByTagName('head')[0].appendChild(script);
+  });
+};