Cookie storage added as option

package.json

@@ -22,6 +22,7 @@
   "dependencies": {
     "fbemitter": "^3.0.0",
     "fbjs": "^3.0.0",
+    "js-cookie": "^3.0.1",
     "prop-types": "^15.7.2"
   },
   "devDependencies": {

src/store.jsx

@@ -1,25 +1,46 @@
-let store;
+import Cookies from 'js-cookie';
 
-const noopStore = {
-  getItem: function () {},
-  setItem: function () {},
-};
+// https://github.com/Modernizr/Modernizr/blob/d4c7b6082709e32fb0589ba38aa96581d44ce395/feature-detects/storage/cookies.js#L16-L35
+const cookiesEnabled = (() => {
+  try {
+    document.cookie = 'cookietest=1';
+    const ret = document.cookie.indexOf('cookietest=') !== -1;
+    document.cookie = 'cookietest=1; expires=Thu, 01-Jan-1970 00:00:01 GMT';
+    return ret;
+  } catch (e) {
+    return false;
+  }
+})();
 
-if (typeof window !== 'undefined' && 'localStorage' in window) {
+// https://github.com/Modernizr/Modernizr/blob/d4c7b6082709e32fb0589ba38aa96581d44ce395/feature-detects/storage/localstorage.js#L17-L46
+const localStorageEnabled = (() => {
+  const mod = 'modernizr';
   try {
-    let key = '__pushtell_react__';
-    window.localStorage.setItem(key, key);
-    if (window.localStorage.getItem(key) !== key) {
-      store = noopStore;
-    } else {
-      window.localStorage.removeItem(key);
-      store = window.localStorage;
-    }
+    localStorage.setItem(mod, mod);
+    localStorage.removeItem(mod);
+    return true;
   } catch (e) {
-    store = noopStore;
+    return false;
   }
-} else {
-  store = noopStore;
-}
+})();
+
+const store = {
+  getItem(key) {
+    if (localStorageEnabled) {
+      return localStorage.getItem(key);
+    }
+    if (cookiesEnabled) {
+      return Cookies.get(key);
+    }
+  },
+  setItem(key, value) {
+    if (localStorageEnabled) {
+      return localStorage.setItem(key, value);
+    }
+    if (cookiesEnabled) {
+      return Cookies.set(key, value);
+    }
+  },
+};
 
 export default store;

yarn.lock

@@ -4075,6 +4075,11 @@ jest@^27.0.1:
     import-local "^3.0.2"
     jest-cli "^27.0.1"
 
+js-cookie@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/js-cookie/-/js-cookie-3.0.1.tgz#9e39b4c6c2f56563708d7d31f6f5f21873a92414"
+  integrity sha512-+0rgsUXZu4ncpPxRL+lNEptWMOWl9etvPHc/koSRp6MPwpRYAhmk0dUG00J4bxVV3r9uUzfo24wW0knS07SKSw==
+
 js-tokens@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"