global: snapshot

website/scripts/utils/storage.js

@@ -0,0 +1,51 @@
+/**
+ * @param {string} key
+ */
+export function readStoredNumber(key) {
+  const saved = readStored(key);
+  if (saved) {
+    return Number(saved);
+  }
+  return null;
+}
+
+/**
+ * @param {string} key
+ */
+export function readStoredBool(key) {
+  const saved = readStored(key);
+  if (saved) {
+    return saved === "true" || saved === "1";
+  }
+  return null;
+}
+
+/**
+ * @param {string} key
+ */
+export function readStored(key) {
+  try {
+    return localStorage.getItem(key);
+  } catch (_) {
+    return null;
+  }
+}
+
+/**
+ * @param {string} key
+ * @param {string | boolean | null | undefined} value
+ */
+export function writeToStorage(key, value) {
+  try {
+    value !== undefined && value !== null
+      ? localStorage.setItem(key, String(value))
+      : localStorage.removeItem(key);
+  } catch (_) {}
+}
+
+/**
+ * @param {string} key
+ */
+export function removeStored(key) {
+  writeToStorage(key, undefined);
+}