Addnew sheets (armor, weapons, malefica) and v13 support

node_modules/localforage/src/utils/isIndexedDBValid.js

@@ -0,0 +1,44 @@
+import idb from './idb';
+
+function isIndexedDBValid() {
+    try {
+        // Initialize IndexedDB; fall back to vendor-prefixed versions
+        // if needed.
+        if (!idb || !idb.open) {
+            return false;
+        }
+        // We mimic PouchDB here;
+        //
+        // We test for openDatabase because IE Mobile identifies itself
+        // as Safari. Oh the lulz...
+        var isSafari =
+            typeof openDatabase !== 'undefined' &&
+            /(Safari|iPhone|iPad|iPod)/.test(navigator.userAgent) &&
+            !/Chrome/.test(navigator.userAgent) &&
+            !/BlackBerry/.test(navigator.platform);
+
+        var hasFetch =
+            typeof fetch === 'function' &&
+            fetch.toString().indexOf('[native code') !== -1;
+
+        // Safari <10.1 does not meet our requirements for IDB support
+        // (see: https://github.com/pouchdb/pouchdb/issues/5572).
+        // Safari 10.1 shipped with fetch, we can use that to detect it.
+        // Note: this creates issues with `window.fetch` polyfills and
+        // overrides; see:
+        // https://github.com/localForage/localForage/issues/856
+        return (
+            (!isSafari || hasFetch) &&
+            typeof indexedDB !== 'undefined' &&
+            // some outdated implementations of IDB that appear on Samsung
+            // and HTC Android devices <4.4 are missing IDBKeyRange
+            // See: https://github.com/mozilla/localForage/issues/128
+            // See: https://github.com/mozilla/localForage/issues/272
+            typeof IDBKeyRange !== 'undefined'
+        );
+    } catch (e) {
+        return false;
+    }
+}
+
+export default isIndexedDBValid;