Added docs for client-side logger

actioncable/app/javascript/action_cable/logger.js

@@ -1,5 +1,10 @@
 import adapters from "./adapters"
 
+// The logger can be enabled with:
+//
+//   ActionCable.logger.enabled = true
+//
+
 export default {
   log(...messages) {
     if (this.enabled) {

guides/source/action_cable_overview.md

@@ -771,6 +771,14 @@ config.action_cable.log_tags = [
 For a full list of all configuration options, see the
 `ActionCable::Server::Configuration` class.
 
+Client-side logs can be enabled with the following:
+
+```ruby
+import * as ActionCable from '@rails/actioncable'
+
+ActionCable.logger.enabled = true
+```
+
 ## Running Standalone Cable Servers
 
 ### In App