Minor fixes

src/framework/helper/animations.ts

@@ -0,0 +1,5 @@
+export const turnOnAnimations = () =>
+  document.body.parentElement.setAttribute('animations', 'on');
+
+export const turnOffAnimations = () =>
+  document.body.parentElement.setAttribute('animations', 'off');

src/framework/helper/polyfills.ts

@@ -0,0 +1,17 @@
+export const addImul = () => {
+  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul
+  if (!Math.imul)
+    Math.imul = function(opA, opB) {
+      opB |= 0; // ensure that opB is an integer. opA will automatically be coerced.
+      // floating points give us 53 bits of precision to work with plus 1 sign bit
+      // automatically handled for our convenience:
+      // 1. 0x003fffff /*opA & 0x000fffff*/ * 0x7fffffff /*opB*/ = 0x1fffff7fc00001
+      //    0x1fffff7fc00001 < Number.MAX_SAFE_INTEGER /*0x1fffffffffffff*/
+      let result = (opA & 0x003fffff) * opB;
+      // 2. We can remove an integer coercion from the statement above because:
+      //    0x1fffff7fc00001 + 0xffc00000 = 0x1fffffff800001
+      //    0x1fffffff800001 < Number.MAX_SAFE_INTEGER /*0x1fffffffffffff*/
+      if (opA & 0xffc00000 /*!== 0*/) result += ((opA & 0xffc00000) * opB) | 0;
+      return result | 0;
+    };
+};

src/framework/helper/random.ts

@@ -1,4 +1,4 @@
-import { addImul } from '../polyfills';
+import { addImul } from './polyfills';
 
 export class Random {
   public constructor(private seed: number) {