NESTile .copy() will copy the data from a given NESTile to the current one.

app/js/models/NESTile.js

@@ -84,6 +84,10 @@ export default class NESTile{
     return d;
   }
 
+  get chr(){
+    return new Uint8Array(this.__data);
+  }
+
   get base64(){
     var b = ""
     for (var i = 0; i < this.__data.length; i++) {
@@ -162,6 +166,12 @@ export default class NESTile{
     return t;
   }
 
+  copy(t){
+    if (!(t instanceof NESTile))
+      throw new TypeError("Expected NESTile object.");
+    this.__data.set(t.__data);
+  }
+
   isEq(tile){
     if (!(tile instanceof NESTile)){
       throw new TypeError("Expected NESTile instance.");