The #\Form is not a standard character name, use #.(code-char 12) instead.

diff --git a/src/js.lisp b/src/js.lisp
index da440dc..ba4378a 100644 (file)
--- a/src/js.lisp
+++ b/src/js.lisp
@@ -402,7 +402,7 @@ this macro."
   '((#\' . #\')
     (#\\ . #\\)
     (#\b . #\Backspace)
-    (#\f . #\Form)
+    (#\f . #.(code-char 12))
     (#\n . #\Newline)
     (#\r . #\Return)
     (#\t . #\Tab)))