w3c/csswg-drafts

[cssom-view] "Elements and viewports have an associated scrol..."

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#1,526 创建于 2017年6月13日

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描述

https://drafts.csswg.org/cssom-view/#terminology

Elements and viewports have an associated scrolling box if has a scrolling mechanism or it overflows its content area and the used value of the overflow-x or overflow-y property is hidden. [CSS3-BOX]

An element is potentially scrollable if all of the following conditions are true:​

The element has an associated CSS layout box. The element is not the HTML body element, or it is and the root element’s used value of the overflow-x or overflow-y properties is not visible. The element’s used value of the overflow-x or overflow-y properties is not visible. Note:​ An element that is potentially scrollable might not have a scrolling box. For instance, it could have overflow set to auto but not have its content overflowing its content area.

The definition of scrolling box looks wrong. Certainly scroll and auto should also cause a scrolling box.

The definition of potentially scrollable also looks wrong w.r.t. overflow: clip.

贡献者指南

技术栈
css
领域
frontend
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
half day
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Understanding of CSS overflow propertiesFamiliarity with CSSOM spec
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
40
研究方向
The issue points out inconsistencies in the definition of 'scrolling box' and 'potentially scrollable' in the CSSOM View spec. The fix requires analyzing the current definitions in the specification (https://drafts.csswg.org/cssom view/#terminology) and proposing corrections to ensure that 'scroll' and 'auto' values create a scrolling box, and that 'overflow: clip' is handled properly. Discussion in the comments may provide additional context. The contributor should draft a pull request with the corrected text.