There are several good Javascript editors for Markdown / Textile (e.g.: http://attacklab.net/showdown/, the one I'm using right now), but all I need is a Javascript function that converts a string from Markdown / Textile -> HTML and back.
What's the best way to do this? (Ideally it would be jQuery-friendly -- e.g., $("#editor").markdown_to_html())
Edit: Another way to put it is that I'm looking for a Javascript implementation of Rails' textilize() and markdown() text helpers
For Markdown -> HTML, there is Showdown
StackOverflow itself uses Markdown language for questions and answers ; did you try to take a look at how it works ?
Well, it seems it is using PageDown which is available under the MIT License
The question Is there any good Markdown Javascript library or control? and its answers might help, too :-)
实际上，如果你仔细看看《决战》，在它的《源代码(file showdown.js)》中，你会发现这部分 comments :
//
// Showdown usage:
//
// var text = "Markdown *rocks*.";
//
// var converter = new Showdown.converter();
// var html = converter.makeHtml(text);
//
// alert(html);
//
// Note: move the sample code to the bottom of this
// file before uncommenting it.
//
它不是jQuery语法，但应该很容易集成到您的应用程序中；-)
关于纺织品，似乎很难找到有用的东西:-(
In the other side, HTML -> Markdown, I guess things might be a bit harder...
What I would do is store both Markdown and HTML in my application data store (database ? ), and use one for editing, and the other for rendering... Would take more space, but it seems less risky than "decrypting" HTML...