add Promise.allSettled polyfill

1 files changed, 13 insertions, 0 deletions

diff --git a/js/reader.js b/js/reader.js
index 0cb1410..047ad1a 100644
--- a/js/reader.js
+++ b/js/reader.js
@@ -10,6 +10,19 @@ const MIN_LENGTH_TO_JUSTIFY = 32; /* characters */
 const LOCATION_DIVISOR = 10;
 const PAGE_RESET_PROGRESS = -1;
 
+Promise.allSettled = Promise.allSettled || ((promises) => Promise.all(
+	promises.map((p) => p
+		.then((value) => ({
+			status: "fulfilled",
+			value
+		}))
+		.catch((reason) => ({
+			status: "rejected",
+			reason
+		}))
+	)
+));
+
 const Reader = {
 	csrf_token: "",
 	last_stored_cfi: "",