# Render differences summary page and real page

**URL:** <https://talk.observablehq.com/t/render-differences-summary-page-and-real-page/1250>\
**Category:** Uncategorized\
**Created:** [September 26, 2018, 11:04am UTC](https://talk.observablehq.com/t/render-differences-summary-page-and-real-page/1250 "2018-09-26T11:04:21Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![RandomFractals](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.observablehq.com/randomfractals/32/759_2.png) [@RandomFractals](https://talk.observablehq.com/u/RandomFractals)\
**Post date:** [September 26, 2018, 10:15pm UTC](https://talk.observablehq.com/t/render-differences-summary-page-and-real-page/1250/3 "2018-09-26T22:15:14Z")

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.@mbostock that explains it 🙂

> [@HTTPRequest Origin="null"](https://talk.observablehq.com/t/httprequest-origin-null/121/15):
>
> 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](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: 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](http://beta.observable.hq.com) to the ‘Access-Control-Allow-Orig…

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