From 0f63538e7656ad5c538a84007a4295de0d0e61d5 Mon Sep 17 00:00:00 2001
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 =?UTF-8?q?=E1=84=90=E1=85=A2?= <kt.kim@ridi.com>
Date: Thu, 27 Mar 2025 17:53:00 +0900
Subject: [PATCH] =?UTF-8?q?=EB=A0=8C=EB=8D=94=EB=A7=81=20=EC=B6=A9?=
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---
 src/common/tts/TTSPiece.es6 | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/common/tts/TTSPiece.es6 b/src/common/tts/TTSPiece.es6
index b41a823..45eef8e 100644
--- a/src/common/tts/TTSPiece.es6
+++ b/src/common/tts/TTSPiece.es6
@@ -129,9 +129,24 @@ export default class TTSPiece {
             valid = false;
             break;
           }
-          if (el && el.nodeType === Node.ELEMENT_NODE && el.innerText.trim().length === 0) {
-            valid = false;
-            break;
+          if (el && el.nodeType === Node.ELEMENT_NODE) {
+            if (el._cachedEmptyState !== undefined) {
+              if (el._cachedEmptyState === true) {
+                valid = false;
+                break;
+              }
+            } else {
+              try {
+                const isEmpty = el.innerText.trim().length === 0;
+                el._cachedEmptyState = isEmpty;
+                if (isEmpty) {
+                  valid = false;
+                  break;
+                }
+              } catch (e) {
+                el._cachedEmptyState = false;
+              }
+            }
           }
           // 이미지, 독음(후리가나)과 첨자는 읽지 않는다
           if (!(valid = (['RT', 'RP', 'SUB', 'SUP', 'IMG'].indexOf(el.nodeName) === -1))) {