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Update platform_specific_instructions.md

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Ashita Prasad
2025-01-14 09:50:11 +05:30
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doc/dev_guide/platform_specific_instructions.md
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@ -44,16 +44,21 @@ For more information on multidex support, you can refer to the Android developer
### Web
If you're building a Flutter app for the web using the `printing` package, you may encounter a build error like:
If you're building a Flutter app for the web, you may encounter a build error like:
```
Error: A value of type 'JSString' can't be assigned to a variable of type 'String'.
Launching lib/main.dart on Chrome in debug mode...
../../../.pub-cache/hosted/pub.dev/printing-5.13.4/lib/printing_web.dart:218:16: Error:
A value of type 'JSString' can't be assigned to a variable of type 'String'.
.toJS;
^
Failed to compile application.
```
This happens because `.toJS` is no longer required for converting Dart strings to JavaScript strings in recent Dart versions.
**Fix:**
Update the `printing_web.dart` file in the `printing` package by removing `.toJS` from:
Update the `printing_web.dart` file in the cached `printing` package by removing `.toJS` as done in the PR [here](https://github.com/DavBfr/dart_pdf/pull/1739/files)
```dart
script.innerHTML =
@ -67,5 +72,4 @@ script.innerHTML =
'''function ${_frameId}_print(){var f=document.getElementById('$_frameId');f.focus();f.contentWindow.print();}''';
```
This fix ensures compatibility with the latest Dart runtime. For more details, refer to [GitHub Issue #1791](https://github.com/DavBfr/dart_pdf/issues/1791).
Read more about it here - https://github.com/DavBfr/dart_pdf/issues/1791