Add ?seed= support

src/util.ts

@@ -2,6 +2,23 @@ import dictionary from "./dictionary.json";
 
 export const dictionarySet: Set<string> = new Set(dictionary);
 
-export function pick<T>(array: Array<T>): T {
-  return array[Math.floor(array.length * Math.random())];
+function mulberry32(a: number) {
+  return function () {
+    var t = (a += 0x6d2b79f5);
+    t = Math.imul(t ^ (t >>> 15), t | 1);
+    t ^= t + Math.imul(t ^ (t >>> 7), t | 61);
+    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
+  };
+}
+
+const seed = Number(new URLSearchParams(window.location.search).get("seed"));
+const makeRandom = () => (seed ? mulberry32(seed) : () => Math.random());
+let random = makeRandom();
+
+export function resetRng(): void {
+  random = makeRandom();
+}
+
+export function pick<T>(array: Array<T>): T {
+  return array[Math.floor(array.length * random())];
 }