diff --git a/src/scripts/rankCells.js b/src/scripts/rankCells.ts
similarity index 98%
rename from src/scripts/rankCells.js
rename to src/scripts/rankCells.ts
index 0d738949..08ff3d55 100644
--- a/src/scripts/rankCells.js
+++ b/src/scripts/rankCells.ts
@@ -1,3 +1,4 @@
+// @ts-nocheck global variables
 import {TIME} from "config/logging";
 import {normalize} from "utils/numberUtils";
 
diff --git a/src/scripts/reGraph.js b/src/scripts/reGraph.ts
similarity index 89%
rename from src/scripts/reGraph.js
rename to src/scripts/reGraph.ts
index 6fdc24ca..71e28f9b 100644
--- a/src/scripts/reGraph.js
+++ b/src/scripts/reGraph.ts
@@ -1,3 +1,4 @@
+// @ts-nocheck global variables
 import {TIME} from "config/logging";
 import {UINT16_MAX} from "constants";
 import {createTypedArray} from "utils/arrayUtils";
@@ -8,7 +9,7 @@ import {rn} from "utils/numberUtils";
 export function reGraph() {
   TIME && console.time("reGraph");
   const {cells: gridCells, points, features} = grid;
-  const newCells = {p: [], g: [], h: []}; // store new data
+  const newCells: {p: number[][]; g: number[]; h: number[]} = {p: [], g: [], h: []}; // store new data
   const spacing2 = grid.spacing ** 2;
 
   for (const i of gridCells.i) {
@@ -36,13 +37,13 @@ export function reGraph() {
     }
   }
 
-  function addNewPoint(i, x, y, height) {
+  function addNewPoint(i: number, x: number, y: number, height: number) {
     newCells.p.push([x, y]);
     newCells.g.push(i);
     newCells.h.push(height);
   }
 
-  function getCellArea(i) {
+  function getCellArea(i: number) {
     const area = Math.abs(d3.polygonArea(getPackPolygon(i)));
     return Math.min(area, UINT16_MAX);
   }
diff --git a/src/scripts/statistics b/src/scripts/statistics.ts
similarity index 89%
rename from src/scripts/statistics
rename to src/scripts/statistics.ts
index d437f715..606befb2 100644
--- a/src/scripts/statistics
+++ b/src/scripts/statistics.ts
@@ -1,11 +1,12 @@
+// @ts-nocheck global variables
 import {INFO} from "config/logging";
-import {byId} from "utils/shorthands";
 import {heightmapTemplates} from "config/heightmap-templates";
 import {locked} from "scripts/options/lock";
+import {getInputValue} from "utils/nodeUtils";
 
 // show map stats on generation complete
 export function showStatistics() {
-  const heightmap = byId("templateInput").value;
+  const heightmap = getInputValue("templateInput");
   const isTemplate = heightmap in heightmapTemplates;
   const heightmapType = isTemplate ? "template" : "precreated";
   const isRandomTemplate = isTemplate && !locked("template") ? "random " : "";
diff --git a/src/utils/arrayUtils.ts b/src/utils/arrayUtils.ts
index 9fead55d..8786fca6 100644
--- a/src/utils/arrayUtils.ts
+++ b/src/utils/arrayUtils.ts
@@ -8,16 +8,25 @@ export function unique<T>(array: T[]) {
   return [...new Set(array)];
 }
 
-interface ICreateTypedArray {
+interface ICreateTypesArrayLength {
   maxValue: number;
   length: number;
-  from?: ArrayLike<number>;
 }
 
-export function createTypedArray({maxValue, length, from}: ICreateTypedArray) {
-  const typedArray = getTypedArray(maxValue);
-  if (!from) return new typedArray(length);
-  return typedArray.from(from);
+interface ICreateTypesArrayFrom {
+  maxValue: number;
+  from: ArrayLike<number>;
+}
+
+export function createTypedArray(params: ICreateTypesArrayLength | ICreateTypesArrayFrom) {
+  const typedArray = getTypedArray(params.maxValue);
+  if ("from" in params) {
+    typedArray.from(params.from);
+  } else if ("length" in params) {
+    return new typedArray(params.length);
+  }
+
+  return typedArray;
 }
 
 function getTypedArray(maxValue: number) {