Re: [csswg-drafts] [css-position] Ability to set a positioned element's containing block to another element (#5952) from Lea Verou via GitHub on 2021-02-09 (public-css-archive@w3.org from February 2021)

From: Lea Verou via GitHub <sysbot+gh@w3.org>
Date: Tue, 09 Feb 2021 01:14:23 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-775578754-1612833262-sysbot+gh@w3.org>

@emilio This is not about allowing arbitrary elements to escape their containing block, that's what #5699 is about. it's about positioning elements relative to another element, so that popups can display relative to the element they are anchored to regardless of where that is, via common `top`/`right`/`bottom`/`left` properties, and without the author having to write complicated buggy JS code for this. 

In fact, these containing blocks could often be *smaller* than the popup that is positioned relative to them. For example, take a look at this popup for editing an `<a>` element's source:
![image](https://user-images.githubusercontent.com/175836/107301606-c9755980-6a49-11eb-8c28-9187c678d045.png)


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Received on Tuesday, 9 February 2021 01:14:25 UTC