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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 Maven dependency in their POM file (or download the new JAR file) and the new version will just work. However, please read carefully below before upgrading, and also review the How to Upgrade instructions.

Incompatible APIs

JavaScriptSupport

Some existing methods of JavaScriptSupport were changed from returning void, to returning the JavaScriptSupport instance, to allow for chaining of calls. This interface is consumed by end-user code, but not generally implemented by end-user code.

Breaking Features

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.

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