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-rw-r--r--js/codeq/prolog.js4
1 files changed, 4 insertions, 0 deletions
diff --git a/js/codeq/prolog.js b/js/codeq/prolog.js
index e35984a..1d2f92e 100644
--- a/js/codeq/prolog.js
+++ b/js/codeq/prolog.js
@@ -207,6 +207,10 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
terminal.onInput = function (command) {
if (promptMode) {
+ if (!command) {
+ terminal.append('?- ', 'output');
+ return;
+ }
promptMode = false;
manualStop = false;
terminal.setNotBuffered();