Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/longest-streak/index.js

@@ -0,0 +1,36 @@
+/**
+ * Get the count of the longest repeating streak of `substring` in `value`.
+ *
+ * @param {string} value
+ *   Content to search in.
+ * @param {string} substring
+ *   Substring to look for, typically one character.
+ * @returns {number}
+ *   Count of most frequent adjacent `substring`s in `value`.
+ */
+export function longestStreak(value, substring) {
+  const source = String(value)
+  let index = source.indexOf(substring)
+  let expected = index
+  let count = 0
+  let max = 0
+
+  if (typeof substring !== 'string') {
+    throw new TypeError('Expected substring')
+  }
+
+  while (index !== -1) {
+    if (index === expected) {
+      if (++count > max) {
+        max = count
+      }
+    } else {
+      count = 1
+    }
+
+    expected = index + substring.length
+    index = source.indexOf(substring, expected)
+  }
+
+  return max
+}