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node_modules/connect-history-api-fallback/lib/index.js

@@ -50,6 +50,17 @@ exports = module.exports = function historyApiFallback(options) {
       var match = parsedUrl.pathname.match(rewrite.from);
       if (match !== null) {
         rewriteTarget = evaluateRewriteRule(parsedUrl, match, rewrite.to, req);
+
+        if(rewriteTarget.charAt(0) !== '/') {
+          logger(
+            'We recommend using an absolute path for the rewrite target.',
+            'Received a non-absolute rewrite target',
+            rewriteTarget,
+            'for URL',
+            req.url
+          );
+        }
+
         logger('Rewriting', req.method, req.url, 'to', rewriteTarget);
         req.url = rewriteTarget;
         return next();
@@ -79,7 +90,7 @@ function evaluateRewriteRule(parsedUrl, match, rule, req) {
   if (typeof rule === 'string') {
     return rule;
   } else if (typeof rule !== 'function') {
-    throw new Error('Rewrite rule can only be of type string of function.');
+    throw new Error('Rewrite rule can only be of type string or function.');
   }
 
   return rule({