fix: undefineds in client. fixes #78, #95

Author: shellscape

client.js

@@ -14,7 +14,23 @@
  */
 
 (() => {
-  // eslint-disable-next-line global-require
+  /* eslint-disable global-require */
   const { run } = require('./lib/client/client');
-  run(__webpack_hash__, ʎɐɹɔosǝʌɹǝs);
+  let hash = '<unknown>';
+  let options;
+  try {
+    options = ʎɐɹɔosǝʌɹǝs;
+  } catch (e) {
+    const log = require('./lib/client/log');
+    log.error(
+      'The entry for webpack-plugin-serve was included in your build, but it does not appear that the plugin was. Please check your configuration.'
+    );
+  }
+
+  try {
+    // eslint-disable-next-line camelcase
+    hash = __webpack_hash__;
+  } catch (e) {} // eslint-disable-line no-empty
+
+  run(hash, options);
 })();