whatwg/html

Investigation requested for beforeprint/afterprint

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#5,096 创建于 2019年11月18日

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 (4 评论) (0 反应) (0 负责人)HTML (7,654 star) (2,520 fork)batch import
clarificationgood first issueneeds tests

描述

If you have A nests B nests C nests D and the user decides to print B (not sure any user agent provides UI for that, but let's assume there is), the specification suggests events in B and C, not D. Is that really what we want?

Also, if you have A nests B1 and B2, what's the order of the events? Does it matter if either B1 or B2 is cross-site? (Is it quicker than postMessage()?)

Marking this as a good first issue as the first step needed here is writing tests for these scenarios, which is relatively straightforward, albeit a bit tedious perhaps. If there are any questions around getting started with tests, do let me know.

贡献者指南

技术栈
htmljavascript
领域
testing
议题类型
research
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。
2
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。
1-3 hours
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。
clear
前置要求
HTMLJavaScriptWeb Platform Tests
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。
60
研究方向
Write tests for beforeprint/afterprint events in nested browsing contexts. Start by examining existing print event tests in the web platform tests repository under the html/ directory. Create tests for nested iframes (A nests B, B nests C, C nests D) with printing from B, and for sibling iframes (A nests B1 and B2). Verify event order and cross site behavior. The maintainer indicated this is a good first issue; tests should be straightforward but tedious.