improve java script

src/out/src/js/webauthn.js

@@ -1,3 +1,6 @@
+/* jshint esversion: 9 */
+/* jslint bitwise: true */
+
 if (!window.PublicKeyCredential) {
     document.getElementById('webauthn').error.value = 'd3NoPublicKeyCredentialSupportedError: aborting';
     document.getElementById('webauthn').submit();
@@ -74,55 +77,55 @@ const prepareOptions = (publicKey) => {
 /** https://gist.github.com/jonleighton/958841 **/
 function base64ArrayBuffer(arrayBuffer) {
     "use strict";
-    var base64    = ''
-    var encodings = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+    let base64    = '';
+    let encodings = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
 
-    var bytes         = new Uint8Array(arrayBuffer)
-    var byteLength    = bytes.byteLength
-    var byteRemainder = byteLength % 3
-    var mainLength    = byteLength - byteRemainder
+    let bytes         = new Uint8Array(arrayBuffer);
+    let byteLength    = bytes.byteLength;
+    let byteRemainder = byteLength % 3;
+    let mainLength    = byteLength - byteRemainder;
 
-    var a, b, c, d
-    var chunk
+    let a, b, c, d;
+    let chunk;
 
     // Main loop deals with bytes in chunks of 3
-    for (var i = 0; i < mainLength; i = i + 3) {
+    for (let i = 0; i < mainLength; i = i + 3) {
         // Combine the three bytes into a single integer
-        chunk = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2]
+        chunk = (bytes[i] << 16) | (bytes[i + 1] << 8) | bytes[i + 2];
 
         // Use bitmasks to extract 6-bit segments from the triplet
-        a = (chunk & 16515072) >> 18 // 16515072 = (2^6 - 1) << 18
-        b = (chunk & 258048)   >> 12 // 258048   = (2^6 - 1) << 12
-        c = (chunk & 4032)     >>  6 // 4032     = (2^6 - 1) << 6
-        d = chunk & 63               // 63       = 2^6 - 1
+        a = (chunk & 16515072) >> 18; // 16515072 = (2^6 - 1) << 18
+        b = (chunk & 258048)   >> 12; // 258048   = (2^6 - 1) << 12
+        c = (chunk & 4032)     >>  6; // 4032     = (2^6 - 1) << 6
+        d = chunk & 63;               // 63       = 2^6 - 1
 
         // Convert the raw binary segments to the appropriate ASCII encoding
-        base64 += encodings[a] + encodings[b] + encodings[c] + encodings[d]
+        base64 += encodings[a] + encodings[b] + encodings[c] + encodings[d];
     }
 
     // Deal with the remaining bytes and padding
     if (byteRemainder === 1) {
-        chunk = bytes[mainLength]
+        chunk = bytes[mainLength];
 
-        a = (chunk & 252) >> 2 // 252 = (2^6 - 1) << 2
+        a = (chunk & 252) >> 2; // 252 = (2^6 - 1) << 2
 
         // Set the 4 least significant bits to zero
-        b = (chunk & 3)   << 4 // 3   = 2^2 - 1
+        b = (chunk & 3)   << 4; // 3   = 2^2 - 1
 
-        base64 += encodings[a] + encodings[b] + '=='
+        base64 += encodings[a] + encodings[b] + '==';
     } else if (byteRemainder === 2) {
-        chunk = (bytes[mainLength] << 8) | bytes[mainLength + 1]
+        chunk = (bytes[mainLength] << 8) | bytes[mainLength + 1];
 
-        a = (chunk & 64512) >> 10 // 64512 = (2^6 - 1) << 10
-        b = (chunk & 1008)  >>  4 // 1008  = (2^6 - 1) << 4
+        a = (chunk & 64512) >> 10; // 64512 = (2^6 - 1) << 10
+        b = (chunk & 1008)  >>  4; // 1008  = (2^6 - 1) << 4
 
         // Set the 2 least significant bits to zero
-        c = (chunk & 15)    <<  2 // 15    = 2^4 - 1
+        c = (chunk & 15)    <<  2; // 15    = 2^4 - 1
 
-        base64 += encodings[a] + encodings[b] + encodings[c] + '='
+        base64 += encodings[a] + encodings[b] + encodings[c] + '=';
     }
 
-    return base64
+    return base64;
 }
 
 const createCredentials = (publicKey) => {
@@ -133,7 +136,7 @@ const createCredentials = (publicKey) => {
     navigator.credentials.create({publicKey: publicKey})
         .then(function (newCredentialInfo) {
             // Send new credential info to server for verification and registration.
-            var cred = {
+            let cred = {
                 id: newCredentialInfo.id,
                 rawId: base64ArrayBuffer(newCredentialInfo.rawId),
                 response: {
@@ -149,7 +152,7 @@ const createCredentials = (publicKey) => {
             document.getElementById('webauthn').error.value = err;
             document.getElementById('webauthn').submit();
         });
-}
+};
 
 const requestCredentials = (publicKey) => {
     "use strict";
@@ -159,7 +162,7 @@ const requestCredentials = (publicKey) => {
     navigator.credentials.get({publicKey: publicKey})
         .then(function (authenticateInfo) {
             // Send authenticate info to server for verification.
-            var cred = {
+            let cred = {
                 id: authenticateInfo.id,
                 rawId: base64ArrayBuffer(authenticateInfo.rawId),
                 response: {
@@ -176,5 +179,5 @@ const requestCredentials = (publicKey) => {
             document.getElementById('webauthn').error.value = err;
             document.getElementById('webauthn').submit();
         });
-}
+};