From 5e6cfba21941c3da002130178ebcce09f9ee5cc8 Mon Sep 17 00:00:00 2001
From: tommy <kazu9su@gmail.com>
Date: Wed, 17 Sep 2025 14:39:24 -0400
Subject: [PATCH] Add style validation for timestamps

---
 lib/parser.js       |  9 ++++++++-
 test/parser.test.js | 10 ++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/parser.js b/lib/parser.js
index 4b06a19..007f42a 100644
--- a/lib/parser.js
+++ b/lib/parser.js
@@ -167,9 +167,16 @@ function parseCue (cue, i, strict) {
     );
   }
 
-  // TODO better style validation
   styles = times[1].replace(TIMESTAMP_REGEXP, '').trim();
 
+  if (styles !== '') {
+    styles.split(' ').forEach((style) => {
+      if (!style.includes(':')) {
+        throw new ParserError(`Invalid inline style (cue #${i})`);
+      }
+    });
+  }
+
   lines.shift();
 
   text = lines.join('\n');
diff --git a/test/parser.test.js b/test/parser.test.js
index ddaa33e..c7f34e0 100644
--- a/test/parser.test.js
+++ b/test/parser.test.js
@@ -478,4 +478,14 @@ a`;
         .should.throw(parserError, /Invalid cue timestamp/);
     }
   );
+
+  it('should throw an error if the inline style is invalid', () => {
+    const input = `WEBVTT
+
+1
+00:00.000 --> 00:00.001 0`;
+
+    (() => { parse(input); })
+      .should.throw(parserError, /Invalid inline style/);
+  });
 });