Rich Text Editing - designMode vs contentEditable

When creating a cross-browser rich text editor. Which would you use a开发者_开发技巧nd why?

Keep in mind that pasting has to be resilient to stand against multiple sources (notepad, word, other websites) and it should not be dependent on any Javascript libraries.

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You probably want contentEditable. designMode applies to the document, contentEditable to a specific element and its children.

http://blog.whatwg.org/the-road-to-html-5-contenteditable