Fix default value in checkboxes in eww

* lisp/net/eww.el (eww-submit): Checked checkboxes need a default
value (bug#43542).

Copyright-paperwork-exempt: yes

diff --git a/lisp/net/eww.el b/lisp/net/eww.el
index 8918be0d2e382e781cdcefcade4f75941427975f..1ed87c66250b4b4c7aa737af6a480d9b7ae0972b 100644 (file)
--- a/lisp/net/eww.el
+++ b/lisp/net/eww.el
@@ -1634,7 +1634,7 @@ See URL `https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Input'.")
          (cond
           ((member (plist-get input :type) '("checkbox" "radio"))
            (when (plist-get input :checked)
-             (push (cons name (plist-get input :value))
+              (push (cons name (or (plist-get input :value) "on"))
                    values)))
           ((equal (plist-get input :type) "file")
             (when-let ((file (plist-get input :filename)))