setting up

src/utils/ScrollToTop.js

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+import { useEffect } from "react";
+import { useLocation } from "react-router-dom";
+
+function ScrollToTop() {
+  let { pathname } = useLocation();
+
+  useEffect(() => {
+    setTimeout(() => {
+      window.scrollTo(0, 0);
+    }, 100);
+    return () => { };
+  }, [pathname]);
+
+  return null;
+}
+
+export default ScrollToTop;

src/utils/numFormatter.js

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+/**
+ * Returns a string with zero padding of the number
+ * 
+ * @param {number} num Input number (positive integer only, for now)
+ * @param {number} places Number of zeroes to pad
+ * @param {"before" | "after"} position Position of zeroes
+ * @returns {string} Zero-padded string
+ */
+export const zeroPaddedString = (num, places, position) => {
+	if (num < 0) throw new Error("negative number");
+	if (places < 0) throw new Error("invalid number of zeroes");
+	if (position !== "before" && position !== "after") throw new Error("invalid position (before or after only)");
+
+	const zeroes = "0".repeat(places);
+	return position === "before" ? '' + zeroes + num : '' + num + zeroes;
+}