Yesod 0.4.0 Released

July 13, 2010

GravatarBy Michael Snoyman

I'm very pleased to announce the release of Yesod 0.4.0. This release includes new major versions for WAI, Hamlet, persistent and web-routes-quasi, pulling in a large number of new features. As an introduction to this release, I've begun a multi-part screencast of a blog tutorial.

The major feature in this release is widgets. This allows you to create modular pieces of HTML/CSS/JavaScript and plug them together with ease. As an example, the widgets tutorial demonstrates having a jQuery UI datepicker and Nic HTML editor without explicitly calling any Javascript.

Other major changes: include a large architectural overhaul of persistent, which does not affect user code very much, but gives much more flexibility in using the library; an updated parser for Hamlet allowing some nice features like quoted attributes; a more sane subsite syntax hopefully allowing interoperation with other frameworks; and much more.

I keep the changelogs separate by project, you can see each of them here:

Unlike other releases, I don't have any major features planned next, so I'm very interested in what the community has to say at this point. I'm hoping to get a few more WAI backends working soon (waiting on some feedback from Snap before releasing a Snap-powered handler), but otherwise I'm open to suggestions.

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