Avoid use of 'let' and 'const'

They are not supported on older browsers, e.g. iOS 9.

app/error-handler.js

@@ -9,7 +9,7 @@
     // Fallback for all uncought errors
     function handleError (event, err) {
         try {
-            const msg = document.getElementById('noVNC_fallback_errormsg');
+            var msg = document.getElementById('noVNC_fallback_errormsg');
 
             // Only show the initial error
             if (msg.hasChildNodes()) {

app/ui.js

@@ -21,7 +21,7 @@ import RFB from "../core/rfb.js";
 import Display from "../core/display.js";
 import * as WebUtil from "./webutil.js";
 
-const UI = {
+var UI = {
 
     connected: false,
     desktopName: "",

app/webutil.js

@@ -206,7 +206,7 @@ export function injectParamIfMissing (path, param, value) {
 // will receive either an event or an error on failure.
 export function fetchJSON(path, resolve, reject) {
     // NB: IE11 doesn't support JSON as a responseType
-    const req = new XMLHttpRequest();
+    var req = new XMLHttpRequest();
     req.open('GET', path);
 
     req.onload = function () {

core/input/devices.js

@@ -19,7 +19,7 @@ import KeyTable from "./keysym.js";
 // Keyboard event handler
 //
 
-const Keyboard = function (defaults) {
+function Keyboard(defaults) {
     this._keyDownList = {};         // List of depressed keys
                                     // (even if they are happy)
     this._pendingKey = null;        // Key waiting for keypress
@@ -276,7 +276,7 @@ make_properties(Keyboard, [
     ['onKeyEvent', 'rw', 'func'] // Handler for key press/release
 ]);
 
-const Mouse = function (defaults) {
+function Mouse(defaults) {
 
     this._doubleClickTimer = null;
     this._lastTouchPos = null;

core/util/events.js

@@ -24,7 +24,7 @@ export function stopEvent (e) {
 // Emulate Element.setCapture() when not supported
 var _captureRecursion = false;
 var _captureElem = null;
-const _captureProxy = function (e) {
+function _captureProxy(e) {
     // Recursion protection as we'll see our own event
     if (_captureRecursion) return;
 
@@ -50,11 +50,11 @@ const _captureProxy = function (e) {
 };
 
 // Follow cursor style of target element
-const _captureElemChanged = function() {
+function _captureElemChanged() {
     var captureElem = document.getElementById("noVNC_mouse_capture_elem");
     captureElem.style.cursor = window.getComputedStyle(_captureElem).cursor;
 };
-const _captureObserver = new MutationObserver(_captureElemChanged);
+var _captureObserver = new MutationObserver(_captureElemChanged);
 
 var _captureIndex = 0;
 

core/util/localization.js

@@ -153,7 +153,7 @@ Localizer.prototype = {
             }
 
             for (var i = 0;i < elem.childNodes.length;i++) {
-                let node = elem.childNodes[i];
+                var node = elem.childNodes[i];
                 if (node.nodeType === node.ELEMENT_NODE) {
                     process(node, enabled);
                 } else if (node.nodeType === node.TEXT_NODE && enabled) {
@@ -166,5 +166,5 @@ Localizer.prototype = {
     },
 }
 
-export const l10n = new Localizer();
+export var l10n = new Localizer();
 export default l10n.get.bind(l10n);

vendor/browser-es-module-loader/dist/browser-es-module-loader.js

@@ -1304,8 +1304,8 @@ var WorkerPool = function (script, size) {
   this._jobs = 0;
   this.onmessage = undefined;
   this._stopTimeout = undefined;
-  for (let i = 0; i < size; i++) {
+  for (var i = 0; i < size; i++) {
-    let wrkr = new Worker(script);
+    var wrkr = new Worker(script);
     wrkr._count = 0;
     wrkr._ind = i;
     wrkr.onmessage = this._onmessage.bind(this, wrkr);
@@ -1321,7 +1321,7 @@ WorkerPool.prototype = {
       clearTimeout(this._stopTimeout);
       this._stopTimeout = undefined;
     }
-    let wrkr = this._workers[this._ind % this._size];
+    var wrkr = this._workers[this._ind % this._size];
     wrkr._count++;
     this._jobs++;
     wrkr.postMessage(msg);

vendor/browser-es-module-loader/src/browser-es-module-loader.js

@@ -144,8 +144,8 @@ var WorkerPool = function (script, size) {
   this._jobs = 0;
   this.onmessage = undefined;
   this._stopTimeout = undefined;
-  for (let i = 0; i < size; i++) {
+  for (var i = 0; i < size; i++) {
-    let wrkr = new Worker(script);
+    var wrkr = new Worker(script);
     wrkr._count = 0;
     wrkr._ind = i;
     wrkr.onmessage = this._onmessage.bind(this, wrkr);
@@ -161,7 +161,7 @@ WorkerPool.prototype = {
       clearTimeout(this._stopTimeout);
       this._stopTimeout = undefined;
     }
-    let wrkr = this._workers[this._ind % this._size];
+    var wrkr = this._workers[this._ind % this._size];
     wrkr._count++;
     this._jobs++;
     wrkr.postMessage(msg);

vendor/pako/lib/utils/common.js

@@ -40,6 +40,6 @@ export function flattenChunks (chunks) {
   return result;
 }
 
-export const Buf8  = Uint8Array;
+export var Buf8  = Uint8Array;
-export const Buf16 = Uint16Array;
+export var Buf16 = Uint16Array;
-export const Buf32 = Int32Array;
+export var Buf32 = Int32Array;

vendor/pako/lib/zlib/deflate.js

@@ -1834,7 +1834,7 @@ function deflateSetDictionary(strm, dictionary) {
 
 
 export { deflateInit, deflateInit2, deflateReset, deflateResetKeep, deflateSetHeader, deflate, deflateEnd, deflateSetDictionary };
-export const deflateInfo = 'pako deflate (from Nodeca project)';
+export var deflateInfo = 'pako deflate (from Nodeca project)';
 
 /* Not implemented
 exports.deflateBound = deflateBound;

vendor/pako/lib/zlib/inflate.js

@@ -1514,7 +1514,7 @@ function inflateSetDictionary(strm, dictionary) {
 }
 
 export { inflateReset, inflateReset2, inflateResetKeep, inflateInit, inflateInit2, inflate, inflateEnd, inflateGetHeader, inflateSetDictionary };
-export const inflateInfo = 'pako inflate (from Nodeca project)';
+export var inflateInfo = 'pako inflate (from Nodeca project)';
 
 /* Not implemented
 exports.inflateCopy = inflateCopy;