Markdown Widget

[pickypg]

This is an issue for a requested new control within EUI: a Markdown-wrapper.

Specifically, I would love to be able to pass something close to if not identical to GitHub Markdown. This may not align very well with existing Kibana Markdown needs though, and I can see certain desirable limitations (e.g., not supporting images).

Imagine this kind of text coming in:

Hey name,

I was hoping that you could answer some questions about this:

> Earlier quote asking about `code`

Sure, what you are looking to do is:

```js
This is a code block
```

You can review that [here](http://some-link.example).

Hope that helps,
Chris

Beyond that our native blockquote CSS looks very different, this should render as something like

<p>Hey name,</p>
<p>I was hoping that you could answer some questions about this:</p>
<blockquote>Earlier quote asking about <EuiCode>code</EuiCode></blockquote>
<p>Sure, what you are looking to do is:</p>
<EuiCodeBlock language="js">This is a code block</EuiCodeBlock>
<p>
  You can review <EuiLink href="http://some-link.example" target="_blank">here</EuiLink>.
</p>
<p>
  Hope that helps,
  <br />
  Chris
<p>

[i-a-n]

note that this has been developed for the Dream Machine project here: https://github.com/elastic/dream-machine/pull/141

could be a decent starting-off point

[snide]

@i-a-n if you wanted to kickstart a PR when you're happy with it, we could take it over and clean up design / accessibility and likely CSP issues that will arise. There's definitely a want for this component, but my guess is it would take a few weeks to get polished where we'd feel comfortable having usage in a place like cloud and you likely don't have time for all the touchup work. But by all means give us a start with what you've got and we can do some work on it.

[i-a-n]

sounds good @snide , thanks. I have one outstanding issue to resolve regarding how the text insertion works, but once that's complete I'll open a PR here.

[ajangus]

Are there any strong feelings on what the preview button should say? @inqueue suggested Preview instead of Preview markdown

[snide]

This will likely go through a few rounds of design. I wouldn't worry too much about the layout or text. We can clean it up during a design pass.

[ajangus]

With #2858 moving forward, closing this one.