chore: add npm + vite for progressive enhancement

src/utils/numberUtils.js

@@ -0,0 +1,26 @@
+"use strict";
+// FMG utils related to numbers
+
+// round value to d decimals
+function rn(v, d = 0) {
+  const m = Math.pow(10, d);
+  return Math.round(v * m) / m;
+}
+
+function minmax(value, min, max) {
+  return Math.min(Math.max(value, min), max);
+}
+
+// return value in range [0, 100]
+function lim(v) {
+  return minmax(v, 0, 100);
+}
+
+// normalization function
+function normalize(val, min, max) {
+  return minmax((val - min) / (max - min), 0, 1);
+}
+
+function lerp(a, b, t) {
+  return a + (b - a) * t;
+}