Visual Studio doesn’t support debugging Unity WebGL content. Use the following tips to get your build information.
Unity WebGL doesn’t have access to your file system, so it doesn’t write a log file like other platforms. However, it does write all logging information such as Debug.Log
, Console.WriteLine
or Unity’s internal logging to the browser’s JavaScript console.
JavaScript コンソールを開くには、以下の手順を行います。
For debugging purposes, you might want to make a development build in Unity (open the Build Settings window and enabled the Development Build checkbox). Development builds allow you to connect the profiler, and Unity doesn’t minify them, so the emitted JavaScript code still contains human-readable (though C++-mangled) function names.
The browser uses these to display stack traces if you run into a browser error, when using Debug.LogError, or when an exception occurs and exception support is disabled
. Unlike the managed stack traces that can occur when you have full exception support (see below), these stack traces have mangled names, and contain not only managed code, but also the internal UnityEngine code.
WebGL has different levels of exception support, but by default, Unity WebGL only supports explicitly thrown exceptions. For more information, refer to Building for WebGL. You can enable Full exception support, which emits additional checks in the IL2CPP-generated code, to catch access to null references and out-of-bounds array elements in your managed code. These additional checks significantly impact performance and increase code size and load times, so you should only use it for debugging.
Full の例外サポートは、マネージコードのスタックトレースを生成するための関数名も出力します。このため、スタックトレースは、キャッチできない例外と Debug.Log
ステートメントのためのコンソールに表示されます。スタックトレース文字列を取得するには System.Environment.Stacktrace
を使用します。
これは一般的な問題で、特に 32 ビットブラウザーで発生します。WebGL のメモリ問題とその修正方法の詳細は、WebGL のメモリ を参照してください。
Unity WebGL は、セッション間で永続化させる必要のあるすべてのファイル (PlayerPrefs や persistentDataPath に保存されるファイルなど) をブラウザー IndexedDB に保存します。これは非同期 API なので、いつ終了するか分かりません。
以下のコードを呼び出して、メモリから IndexedDB ファイルシステムへの、持続中のファイルシステムの書き込み操作をすべてフラッシュするようにします。
FS.syncfs(false, function (err) {
if (err) {
console.log("Error: syncfs failed!");
}
});
The browser console log usually prints this error due to incorrect server configuration. For more information on how to deploy a release build, refer to documentation on Deploying compressed builds.
The browser console log prints this error when the content tries to load an AssetBundle compressed using LZMA, which Unity WebGL doesn’t support. Re-compress the AssetBundle using LZ4 compression to solve this problem. For more information on compression for WebGL, refer to documentation on WebGL building, particularly the AssetBundles section.
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.