Re-apply #58 from scisci/master

Author: alizain

lib/index.esm.js

@@ -102,7 +102,9 @@ function detectPrng() {
     if (browserCrypto) {
         try {
             return function () {
-                return browserCrypto.getRandomValues(new Uint8Array(1))[0] / 0xff;
+                var buffer = new Uint8Array(1);
+                browserCrypto.getRandomValues(buffer);
+                return buffer[0] / 0xff;
             };
         } catch (e) {}
     } else {

lib/index.js

@@ -102,7 +102,11 @@ export function detectPrng(allowInsecure = false, root) {
     const browserCrypto = root && (root.crypto || root.msCrypto);
     if (browserCrypto) {
         try {
-            return () => browserCrypto.getRandomValues(new Uint8Array(1))[0] / 0xff;
+            return () => {
+                const buffer = new Uint8Array(1);
+                browserCrypto.getRandomValues(buffer);
+                return buffer[0] / 0xff;
+            };
         }
         catch (e) { }
     }

lib/index.umd.js

@@ -108,7 +108,9 @@ function detectPrng() {
     if (browserCrypto) {
         try {
             return function () {
-                return browserCrypto.getRandomValues(new Uint8Array(1))[0] / 0xff;
+                var buffer = new Uint8Array(1);
+                browserCrypto.getRandomValues(buffer);
+                return buffer[0] / 0xff;
             };
         } catch (e) {}
     } else {

src/index.ts

@@ -124,7 +124,11 @@ export function detectPrng(allowInsecure: boolean = false, root?: any): PRNG {
 
   if (browserCrypto) {
     try {
-      return () => browserCrypto.getRandomValues(new Uint8Array(1))[0] / 0xff
+      return () => {
+        const buffer = new Uint8Array(1)
+        browserCrypto.getRandomValues(buffer)
+        return buffer[0] / 0xff
+      }
     } catch (e) {}
   } else {
     try {