From 999490fae4e9a549fcb144791cee4847e12c907f Mon Sep 17 00:00:00 2001
From: Alex Lai <74868436+Alx-Lai@users.noreply.github.com>
Date: Mon, 16 Dec 2024 22:42:52 +0800
Subject: [PATCH] book.js: early return if response error (#2520)

It used to have a ugly error message shows that "Playground
Communication: Cannot read properties of undefined (reading 'trim')",
which is due to the fact that the response lacks stdout attr.

Issue: #2477

Signed-off-by: Alx-Lai <alexabc722@gmail.com>
---
 theme/book.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/theme/book.js b/theme/book.js
index 4b07867a..a1f23731 100644
--- a/theme/book.js
+++ b/theme/book.js
@@ -171,6 +171,13 @@ function playground_text(playground, hidden = true) {
                 "latency": (endTime - startTime) / 1000,
             });
 
+            if (response.error != null && response.error != '') {
+                // output the error if there's any. e.g. timeout
+                result_block.innerText = response.error;
+                result_block.classList.remove("result-no-output");
+                return;
+            }
+
             if (response.stdout.trim() === '') {
                 result_block.innerText = "No output";
                 result_block.classList.add("result-no-output");