iOS 12 support

data/src/emulator.js

@@ -89,7 +89,6 @@ class EmulatorJS {
         }
         return options[core] || core;
     }
-    extensions = []
     createElement(type) {
         return document.createElement(type);
     }
@@ -225,6 +224,8 @@ class EmulatorJS {
     }
     constructor(element, config) {
         this.ejs_version = "4.0.13-beta";
+        this.extensions = [];
+        this.initControlVars();
         this.debug = (window.EJS_DEBUG_XX === true);
         if (this.debug || (window.location && ['localhost', '127.0.0.1'].includes(location.hostname))) this.checkForUpdates();
         this.netplayEnabled = (window.EJS_DEBUG_XX === true) && (window.EJS_EXPERIMENTAL_NETPLAY === true);
@@ -397,12 +398,13 @@ class EmulatorJS {
             this.setupAds(this.config.adUrl, this.config.adSize[0], this.config.adSize[1]);
         }
     }
-    functions = {};
     on(event, func) {
+        if (!this.functions) this.functions = {};
         if (!Array.isArray(this.functions[event])) this.functions[event] = [];
         this.functions[event].push(func);
     }
     callEvent(event, data) {
+        if (!this.functions) this.functions = {};
         if (!Array.isArray(this.functions[event])) return 0;
         this.functions[event].forEach(e => e(data));
         return this.functions[event].length;
@@ -2773,7 +2775,8 @@ class EmulatorJS {
         this.controlMenu.appendChild(popup);
         
     }
-    defaultControllers = {
+    initControlVars() {
+        this.defaultControllers = {
             0: {
                 0: {
                     'value': 'x',
@@ -2888,7 +2891,7 @@ class EmulatorJS {
             2: {},
             3: {}
         }
-    keyMap = {
+        this.keyMap = {
             0: '',
             8: 'backspace',
             9: 'tab',
@@ -2990,7 +2993,7 @@ class EmulatorJS {
             221: 'close braket',
             222: 'single quote'
         }
-    controls;
+    }
     setupKeys() {
         for (let i=0; i<4; i++) {
             for (let j=0; j<30; j++) {

data/src/gamepad.js

@@ -1,7 +1,4 @@
 class GamepadHandler {
-    gamepads;
-    timeout;
-    listeners;
     constructor() {
         this.buttonLabels = {
             0: 'BUTTON_1',