diff --git a/examples/c_contract/hotpocket_contract.h b/examples/c_contract/hotpocket_contract.h
index 02715770..80c58477 100644
--- a/examples/c_contract/hotpocket_contract.h
+++ b/examples/c_contract/hotpocket_contract.h
@@ -12,7 +12,7 @@
 #include "json.h"
 
 #define __HP_MMAP_BLOCK_SIZE 4096
-#define __HP_MMAP_BLOCK_ALIGN(x) (((x) + ((typeof(x))(__HP_MMAP_BLOCK_SIZE)-1)) & ~((typeof(x))(__HP_MMAP_BLOCK_SIZE)-1))
+#define __HP_MMAP_BLOCK_ALIGN(x) (((x) + ((off_t)(__HP_MMAP_BLOCK_SIZE)-1)) & ~((off_t)(__HP_MMAP_BLOCK_SIZE)-1))
 #define __HP_STREAM_MSG_HEADER_SIZE 4
 #define __HP_SEQPKT_MAX_SIZE 131072 // 128KB to support SEQ_PACKET sockets.
 #define HP_PEER_MSG_MAX_SIZE __HP_SEQPKT_MAX_SIZE
diff --git a/examples/js_client/browser-test.html b/examples/js_client/browser-example.html
similarity index 100%
rename from examples/js_client/browser-test.html
rename to examples/js_client/browser-example.html
diff --git a/examples/js_client/hp-client-lib.js b/examples/js_client/hp-client-lib.js
index c22fee1d..51ef0089 100644
--- a/examples/js_client/hp-client-lib.js
+++ b/examples/js_client/hp-client-lib.js
@@ -674,9 +674,10 @@
 
     // Set sodium reference.
     async function initSodium() {
-        if (sodium) // If already set, do nothing.
+        if (sodium) { // If already set, do nothing.
             return;
-        else if (isBrowser && window.sodium) { // If no parameter specified, try to get from window.sodium.
+        }
+        else if (isBrowser && window.sodium) { // browser (if sodium already loaded)
             sodium = window.sodium;
         }
         else if (isBrowser && !window.sodium) { // If sodium not yet loaded in browser, wait for sodium ready.
@@ -693,26 +694,33 @@
             sodium = require('libsodium-wrappers');
             await sodium.ready;
         }
+        else {
+            throw "Sodium reference not found. Please include sodium js lib in browser scripts.";
+        }
     }
 
     // Set bson reference.
     function initBson() {
         if (bson) // If already set, do nothing.
             return;
-        else if (isBrowser && window.BSON) // If no parameter specified, try to get from window.BSON.
+        else if (isBrowser && window.BSON) // browser
             bson = window.BSON;
         else if (!isBrowser) // nodejs
             bson = require('bson');
+        else
+            throw "BSON reference not found.";
     }
 
     // Set WebSocket reference.
     function initWebSocket() {
         if (WebSocket) // If already set, do nothing.
             return;
-        else if (isBrowser && window.WebSocket) // If no parameter specified, try to get from window.WebSocket.
+        else if (isBrowser && window.WebSocket) // browser
             WebSocket = window.WebSocket;
         else if (!isBrowser) // nodejs
             WebSocket = require('ws');
+        else
+            throw "WebSocket reference not found.";
     }
 
     const hotPocketLib = {