--- a
+++ b/wvclient.js
@@ -0,0 +1,21 @@
+<script>
+const consoleLog = window.console.log;
+const newConsole = window.console;
+newConsole.log = function(args) {
+    if (parent !== undefined)
+        parent.postMessage(args, "*");
+    consoleLog(args);
+};
+newConsole.warn = function(args) {
+    if (parent !== undefined)
+        parent.postMessage(args, "*");
+    consoleLog(args);
+};
+newConsole.info = newConsole.log;
+newConsole.error = function(args) {
+    if (parent !== undefined)
+        parent.postMessage(args, "*");
+    consoleLog(args);
+};
+console = newConsole;
+</script>