typescript! yay! (pain.)

src/utils/numFormatter.js

@@ -1,16 +0,0 @@
-/**
- * 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;
-}

src/utils/numFormatter.ts

@@ -0,0 +1,13 @@
+export const zeroPaddedString = (
+  num: number,
+  places: number,
+  position: "before" | "after"
+): string => {
+  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;
+};