Render differences summary page and real page

[RandomFractals]

.@mbostock that explains it

HTTPRequest Origin="null"

I think the main issue with the way observable sets up origin for code cell is that unlike the notebook itself, which has https://beta.observablehq.com origin, code cell frames are pinned to custom user static content. See origin request header generated from a fetch() cell call: [observable-fetch-headers] Therefore, even if you have control over the server hosting a data API you’d like others to use on observable, you can’t simply add beta.observable.hq.com to the ‘Access-Control-Allow-Orig…