1 files changed, 27 insertions, 0 deletions
diff --git a/devtools/shared/path.js b/devtools/shared/path.js
new file mode 100644
index 0000000000..759311fdee
--- /dev/null
+++ b/devtools/shared/path.js
@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/*
+ * Join all the arguments together and normalize the resulting URI.
+ * The initial path must be an full URI with a protocol (i.e. http://).
+ */
+exports.joinURI = (initialPath, ...paths) => {
+  let url;
+
+  try {
+    url = new URL(initialPath);
+  } catch (e) {
+    return null;
+  }
+
+  for (const path of paths) {
+    if (path) {
+      url = new URL(path, url);
+    }
+  }
+
+  return url.href;
+};