improve behaviour of "backspace"

1 files changed, 6 insertions, 2 deletions

diff --git a/index.html b/index.html
index a13e770..4ac437c 100644
--- a/index.html
+++ b/index.html
@@ -44,7 +44,7 @@
     for (let i = 1; i <= 5; i++) {
       table
         .querySelector("#row_" + row_count)
-        .innerHTML += "<td id=\"column_" + i + "\" style=\"" + cell_style + "\"></td>";
+        .innerHTML += "<td id=\"column_" + i + "\" style=\"" + cell_style + "\">&nbsp;</td>";
     }
     cursor_column = 1;
     updateCursorDisplay();
@@ -77,7 +77,11 @@
     let cursor_increment = 1;
     table.removeAttribute('bgcolor');
     if (key == '#backspace') {
-      if (cursor_column > 1) {
+      if (cursor_column > 1 &&
+          table
+            .querySelector("#row_" + row_count)
+            .querySelector("#column_" + cursor_column)
+            .innerHTML == '&nbsp;') {
         cursor_column--;
       }
       to_print = '&nbsp;';