1 files changed, 29 insertions, 0 deletions
diff --git a/dom/workers/test/sourcemap_header_debugger.js b/dom/workers/test/sourcemap_header_debugger.js
new file mode 100644
index 0000000000..bb8ed0c1f7
--- /dev/null
+++ b/dom/workers/test/sourcemap_header_debugger.js
@@ -0,0 +1,29 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+"use strict";
+
+addEventListener("message", function (event) {
+  let data;
+  try {
+    data = JSON.parse(event.data);
+  } catch {}
+
+  switch (data.type) {
+    case "request-sourceMapURL":
+      const dbg = new Debugger(global);
+      const sourceMapURLs = dbg
+        .findSources()
+        .filter(source => source.url === data.url)
+        .map(source => source.sourceMapURL);
+
+      postMessage(
+        JSON.stringify({
+          type: "response-sourceMapURL",
+          value: sourceMapURLs,
+        })
+      );
+      break;
+  }
+});