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-rw-r--r--dom/workers/test/WorkerDebugger.initialize_debugger_es_worker.js10
1 files changed, 10 insertions, 0 deletions
diff --git a/dom/workers/test/WorkerDebugger.initialize_debugger_es_worker.js b/dom/workers/test/WorkerDebugger.initialize_debugger_es_worker.js
new file mode 100644
index 0000000000..d357fca2d3
--- /dev/null
+++ b/dom/workers/test/WorkerDebugger.initialize_debugger_es_worker.js
@@ -0,0 +1,10 @@
+"use strict";
+
+// The following check is one possible way to identify
+// if this script is loaded as a ES Module or the classic way.
+const isLoadedAsEsModule = this != globalThis;
+
+// We expect the debugger script to always be loaded as classic
+if (!isLoadedAsEsModule) {
+ postMessage("debugger script ran");
+}