I heard that the new HTML5 will add rich text capability to textareas (it will make them more flexible), so you can do stuff like code syntax highlighting editors without very nasty javascript (like creating iframes and stuff).
Is this true? Are there browsers with support for it yet? And where can I find some API?
Are you looking for Aloha Editor?
It's using the new contenteditable attribute to add a WYSIWYG editor to any div you choose.
Look at the demos.
NO - jQuery
If what you where looking for (the same as me) is NO-jquery tools (pure HTML/CSS + basic JS), then some of the best options I found are:
Nevertheless, those in the list above all convert the element (textarea) into an iframe, so they weren't exactly what I was searching for, finally I found this one which respects the original element (divs or so, but if you use textarea it does creates an additional div), allowing full straightforward JS app development:
Hope this helps you too!
I believe what you are referring to is the new contentEditable attribute. This is not a textarea, but rather an element attribute. This is good for allowing changes to content.
Try http://html5demos.com/contenteditable
Notice that your browser likely doesn't give you the toolbar with bold, italics, etc. Yet chrome will let you select text and use CTR-B, CTR-I, etc. Things are still being ironed out with this.
Basically, it's a work in progress and your best bet for browser compatability is using a wysiwyg editer like tinymce et al.
Where have you heard that? Looking at W3Schools > HTML5 > textarea I can't see anything that hints this is true.
Edit: added more links due to comments of people who dislike w3schools
Even tho it's essentially the same thing at this point, here's the link to w3.org for wiki textarea, as well as the spec for textarea. Also, here's the document with differences of html 4 and 5 as of march 29, 2012
来源：https://stackoverflow.com/questions/10404312/html5-rich-text-inside-textarea