Merge pull request #139 from rollbar/fixed/issue-87-client-side-script-missing-nonce

Added option to configure a nonce on the frontend JS script attribute.

Author: danielmorell

README.md

@@ -193,6 +193,17 @@ Filters the Rollbar JavaScript configuration.
 
 * `array $config` - The Rollbar JavaScript configuration array.
 
+#### `apply_filters('rollbar_js_nonce', string|null $nonce)`
+
+Filter that can be used to set the nonce attribute value of the frontend JS script.
+
+**Since: 3.1.0**
+
+**Parameters**
+
+* `string|null $nonce` - The nonce value to be used in the script tag. If `null` the attribute is excluded. Default 
+  is `null`.
+
 #### `apply_filters('rollbar_plugin_settings', array $settings)`
 
 Filters the Rollbar plugin settings.

src/Plugin.php

@@ -349,7 +349,16 @@ public function initJsLogging(): void
             return;
         }
 
-        $rollbarJs = RollbarJsHelper::buildJs($this->buildJsConfig());
+        /**
+         * Filter that can be used to set the nonce attribute value of the frontend JS script.
+         *
+         * @param string|null $nonce The nonce value to be used in the script tag. If `null` the attribute is excluded.
+         *                           Default is `null`.
+         * @since 3.1.0
+         */
+        $nonce = apply_filters('rollbar_js_nonce', null);
+
+        $rollbarJs = RollbarJsHelper::buildJs($this->buildJsConfig(), nonce: $nonce);
 
         echo $rollbarJs;
     }