1 files changed, 113 insertions, 0 deletions
diff --git a/assets/js/polyfills/event_key.js b/assets/js/polyfills/event_key.js
new file mode 100644
index 00000000..cd1191f5
--- /dev/null
+++ b/assets/js/polyfills/event_key.js
@@ -0,0 +1,113 @@
+(function () {
+
+    var keyboardeventKeyPolyfill = {
+        polyfill: polyfill,
+        keys: {
+            3: 'Cancel',
+            6: 'Help',
+            8: 'Backspace',
+            9: 'Tab',
+            12: 'Clear',
+            13: 'Enter',
+            16: 'Shift',
+            17: 'Control',
+            18: 'Alt',
+            19: 'Pause',
+            20: 'CapsLock',
+            27: 'Escape',
+            28: 'Convert',
+            29: 'NonConvert',
+            30: 'Accept',
+            31: 'ModeChange',
+            32: ' ',
+            33: 'PageUp',
+            34: 'PageDown',
+            35: 'End',
+            36: 'Home',
+            37: 'ArrowLeft',
+            38: 'ArrowUp',
+            39: 'ArrowRight',
+            40: 'ArrowDown',
+            41: 'Select',
+            42: 'Print',
+            43: 'Execute',
+            44: 'PrintScreen',
+            45: 'Insert',
+            46: 'Delete',
+            48: ['0', ')'],
+            49: ['1', '!'],
+            50: ['2', '@'],
+            51: ['3', '#'],
+            52: ['4', '$'],
+            53: ['5', '%'],
+            54: ['6', '^'],
+            55: ['7', '&'],
+            56: ['8', '*'],
+            57: ['9', '('],
+            91: 'OS',
+            93: 'ContextMenu',
+            144: 'NumLock',
+            145: 'ScrollLock',
+            181: 'VolumeMute',
+            182: 'VolumeDown',
+            183: 'VolumeUp',
+            186: [';', ':'],
+            187: ['=', '+'],
+            188: [',', '<'],
+            189: ['-', '_'],
+            190: ['.', '>'],
+            191: ['/', '?'],
+            192: ['`', '~'],
+            219: ['[', '{'],
+            220: ['\\', '|'],
+            221: [']', '}'],
+            222: ["'", '"'],
+            224: 'Meta',
+            225: 'AltGraph',
+            246: 'Attn',
+            247: 'CrSel',
+            248: 'ExSel',
+            249: 'EraseEof',
+            250: 'Play',
+            251: 'ZoomOut'
+        }
+    };
+
+    // Function keys (F1-24).
+    var i;
+    for (i = 1; i < 25; i++) {
+        keyboardeventKeyPolyfill.keys[111 + i] = 'F' + i;
+    }
+
+    // Printable ASCII characters.
+    var letter = '';
+    for (i = 65; i < 91; i++) {
+        letter = String.fromCharCode(i);
+        keyboardeventKeyPolyfill.keys[i] = [letter.toLowerCase(), letter.toUpperCase()];
+    }
+
+    function polyfill() {
+        if (!('KeyboardEvent' in window) ||
+            'key' in KeyboardEvent.prototype) {
+            return false;
+        }
+
+        // Polyfill `key` on `KeyboardEvent`.
+        var proto = {
+            get: function (x) {
+                var key = keyboardeventKeyPolyfill.keys[this.which || this.keyCode];
+
+                if (Array.isArray(key)) {
+                    key = key[+this.shiftKey];
+                }
+
+                return key;
+            }
+        };
+        Object.defineProperty(KeyboardEvent.prototype, 'key', proto);
+        return proto;
+    }
+
+    keyboardeventKeyPolyfill.polyfill();
+
+})();