w3c/csswg-drafts

[cssom-view] Better define "Web-exposed screen area"

Open

#1,145 opened on Mar 30, 2017

View on GitHub
 (0 comments) (0 reactions) (0 assignees)HTML (3,546 stars) (545 forks)batch import
Help Wantedcssom-view-1topic: multiple globals

Description

https://drafts.csswg.org/cssom-view/#web-exposed-screen-area

In the case of using the "viewport", it's not defined which viewport that is. Probably need to say "for a browsing context" or so, and pass in a browsing context everywhere that uses this term.

That browsing context likely should be the top-level browsing context. It would not make much sense for window.open() in an <iframe> to be sized after the <iframe>'s viewport; it should be sized after the top-level browsing context (even if that is cross-origin, I think -- it's already possible to follow a link with target _top and check dimensions you get, so it's not exposing new information across origins).

Contributor guide

Tech stack
None
Domain
documentation
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
understanding of CSSOM view specificationsfamiliarity with web browsing contexts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Investigate the CSSOM view spec draft at https://drafts.csswg.org/cssom view/#web exposed screen area. Determine the correct browsing context to use (top level browsing context as suggested) and propose a change to the spec to define 'Web exposed screen area' more precisely, passing in a browsing context parameter where needed.