even more debug output

src/lib.rs

@@ -86,6 +86,7 @@ pub fn eval_boolean(s: &str, js_trace: JsValue) -> JsValue {
             return JsValue::from_str(format!("failed to parse expression: {}", joined).as_str());
         },
     };
+    console::log_1(&JsValue::from_str("evaluating property..."));
     // evaluate property on trace
     let eval_result = match expr {
         Expr::Bool(bool_expr) => BooleanSemantics::eval::<interpolation::Constant>(&bool_expr, &m),