1 files changed, 36 insertions, 0 deletions
diff --git a/javascript/videojs/src/js/utils/guid.js b/javascript/videojs/src/js/utils/guid.js
new file mode 100644
index 0000000..7801251
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+++ b/javascript/videojs/src/js/utils/guid.js
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+/**
+ * @file guid.js
+ * @module guid
+ */
+
+// Default value for GUIDs. This allows us to reset the GUID counter in tests.
+//
+// The initial GUID is 3 because some users have come to rely on the first
+// default player ID ending up as `vjs_video_3`.
+//
+// See: https://github.com/videojs/video.js/pull/6216
+const _initialGuid = 3;
+
+/**
+ * Unique ID for an element or function
+ *
+ * @type {Number}
+ */
+let _guid = _initialGuid;
+
+/**
+ * Get a unique auto-incrementing ID by number that has not been returned before.
+ *
+ * @return {number}
+ *         A new unique ID.
+ */
+export function newGUID() {
+  return _guid++;
+}
+
+/**
+ * Reset the unique auto-incrementing ID for testing only.
+ */
+export function resetGuidInTestsOnly() {
+  _guid = _initialGuid;
+}