npm and error messages

node_modules/webpack/lib/node/NodeEnvironmentPlugin.js

@@ -0,0 +1,25 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const NodeWatchFileSystem = require("./NodeWatchFileSystem");
+const NodeOutputFileSystem = require("./NodeOutputFileSystem");
+const NodeJsInputFileSystem = require("enhanced-resolve/lib/NodeJsInputFileSystem");
+const CachedInputFileSystem = require("enhanced-resolve/lib/CachedInputFileSystem");
+
+class NodeEnvironmentPlugin {
+	apply(compiler) {
+		compiler.inputFileSystem = new CachedInputFileSystem(new NodeJsInputFileSystem(), 60000);
+		const inputFileSystem = compiler.inputFileSystem;
+		compiler.outputFileSystem = new NodeOutputFileSystem();
+		compiler.watchFileSystem = new NodeWatchFileSystem(compiler.inputFileSystem);
+		compiler.plugin("before-run", (compiler, callback) => {
+			if(compiler.inputFileSystem === inputFileSystem)
+				inputFileSystem.purge();
+			callback();
+		});
+	}
+}
+module.exports = NodeEnvironmentPlugin;