Looks like a nice entrant to the space. React is very well suited to this problem space and they clearly understand many of the pitfalls and problems.<p>A few questions&#x2F;concerns:<p>1. It doesn&#x27;t look like the undo&#x2F;redo state is global to the page. The built in undo&#x2F;redo stack in browsers is global to the page so this is the expectation users will have. If you use multiple instances of Draft.js in your page they will each have their own stack, which is less than ideal. I realize having a singleton to manage this across all editor instances is more difficult in the React&#x2F;Flux paradigm, but it would be much better from a user experience perspective. Related to this:<p>2. I don&#x27;t think you can nest Draft.js instances. There are a number of simple cases where you might want to do this (e.g. custom block with image + caption). To support this in the future it seems you would need to account for it in the selection and undo&#x2F;redo stack state handling.<p>3. The data format has a lot of repetition in how it stores inline styles[1]. I&#x27;m interested to know why they chose to represent the data this way instead of using indices. For instance, you can represent a inline bold style with a json object like so: {type: &#x27;BOLD&#x27;, startOffset: 5, endOffset: 10}. The format they chose to use is easier to render directly, but more difficult to parse visually and less space efficient (except in the case of styles that only cover a few characters).<p>Finally, it seems most modern WYSIWYG editors mentioned in the comments here were at least partially influenced by the original Medium post &quot;Why ContentEditable is Terrible&quot;[2]. It would be great for the community to standardize on a data model&#x2F;format that could be used in all of these editors. There are enough commonalities (blocks, elements, etc.) that I believe we could create a common document spec that would be usable in all of these popular editors. The benefit of this would be having a common spec to build additional libraries for diffing, server rendering, native mobile editing, and so on.<p>[1] <a href="http:&#x2F;&#x2F;facebook.github.io&#x2F;draft-js&#x2F;docs&#x2F;advanced-topics-inline-styles.html#model" rel="nofollow">http:&#x2F;&#x2F;facebook.github.io&#x2F;draft-js&#x2F;docs&#x2F;advanced-topics-inli...</a>
[2] <a href="https:&#x2F;&#x2F;medium.com&#x2F;medium-eng&#x2F;why-contenteditable-is-terrible-122d8a40e480#.sbk9m56cs" rel="nofollow">https:&#x2F;&#x2F;medium.com&#x2F;medium-eng&#x2F;why-contenteditable-is-terribl...</a>