support mapping <backspace>

Chrome stop using <backspace> to go back, but some still wants this
feature.

This should fix #2207 and #2214.

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/keyboard_utils.coffee b/lib/keyboard_utils.coffee
index f997b455..65c67ec0 100644
--- a/lib/keyboard_utils.coffee
+++ b/lib/keyboard_utils.coffee
@@ -49,6 +49,8 @@ KeyboardUtils =
       event.key.toLowerCase() # F1 to F9.
     else if event.key.length == 3 and "F10" <= event.key <= "F12"
       event.key.toLowerCase() # F10 to F12.
+    else if event.key.length > 3 and event.key in ["Backspace"]
+      event.key.toLowerCase() # F10 to F12.
     else
       ""
 
@@ -60,6 +62,7 @@ KeyboardUtils =
       if (event.keyCode >= @keyCodes.f1 && event.keyCode <= @keyCodes.f12)
         return "f" + (1 + event.keyCode - keyCodes.f1)
       return ""
+    return "backspace" if event.keyIdentifier == "U+0008"
 
     keyIdentifier = event.keyIdentifier
     # On Windows, the keyIdentifiers for non-letter keys are incorrect. See