migrate

public/lib/polyfill.js

@@ -0,0 +1,19 @@
+// Polyfills for old Safari versions
+if (!Object.hasOwn) {
+    Object.hasOwn = function (obj, prop) { return obj.hasOwnProperty(prop); }
+}
+
+if (!Array.prototype.findLastIndex) {
+    Array.prototype.findLastIndex = function (callback, thisArg) {
+        for (let i = this.length - 1; i >= 0; i--) {
+            if (callback.call(thisArg, this[i], i, this)) return i;
+        }
+        return -1;
+    };
+}
+
+if (!Array.prototype.toSorted) {
+    Array.prototype.toSorted = function (compareFunction) {
+        return this.slice().sort(compareFunction);
+    };
+}