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Comment: Minor updates

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This is the consolidated list of changes between Tapestry versions 5.3 and 5.4. To upgrade to 5.4, most users who are not using deprecated features will be able to just update the dependency version in their Maven POM file or Gradle build script (or download the new JAR files) and the new version will just work. However, please , although the introduction of Bootstrap CSS will require some styling adjustments for most application.. Please read carefully below before upgrading, and also review the How to Upgrade instructions.

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Tapestry's use of the Javassist bytecode library has been completely removed, along with many related services, such as ClassFactory, that were deprecated in 5.3. Use PlasticProxyFactory instead. Most users will not be affected by this unless they relied on Tapestry's dependency on Javassist.

MarkupWriterFactory API changed

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The library approach is fundamentally limited in a number of ways, including namespace pollution and dealing with dependencies between libraries. Tapestry 5.4 introduces a parallel mechanism, based on RequireJS and the Asynchronous Module Definition as a way to speed up initial page load and organize client-side JavaScript in a more expressive and maintainable way.

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