Merge pull request #3 from V3ntus/master

Added keyboard input support

js/binaryCalculator.js

@@ -10,15 +10,15 @@ function insert(num){
 
 function eql(){
     let result = res.innerHTML;
-    
+
     operator = result.replace(/[0-9]/g, '');
-    result = result.split(new RegExp(/[+\-*/]/));    
-    
+    result = result.split(new RegExp(/[+\-*/]/));
+
     let num1 = result[0];
     let num2 = result[1];
-    
+
     num1 = binaryToDecimal(num1);
-    num2 = binaryToDecimal(num2);    
+    num2 = binaryToDecimal(num2);
 
     switch(operator){
         case '+':
@@ -55,4 +55,27 @@ function binaryToDecimal(binary){
         decimal += binary[i] * Math.pow(2, binary.length - i - 1);
     }
     return decimal;
-}
+}
+
+// register a keystroke listener
+document.addEventListener('keydown', (event) => {
+  if (event.which == 96) { // if numpad0
+    insert(0);
+  } else if (event.which == 97) { // if numpad1
+    insert(1);
+  } else if (event.which == 48) { // if digit0
+    insert(0);
+  } else if (event.which == 49) { // if digit1
+    insert(1);
+  } else if (event.which == 107) { // if numpadAdd
+    insert('+');
+  } else if (event.which == 109) { // if numpadSubtract
+    insert('-');
+  } else if (event.which == 111) { // if numpadDivide
+    insert('/');
+  } else if (event.which == 106) { // if numpadMultiply
+    insert('*');
+  } else if (event.which == 13) { // if numpadEnter
+    eql();
+  }
+});