rstudio/shiny

Add support for ifelse logic in conditionalPanel

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#843 创建于 2015年5月22日

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 (3 评论) (4 反应) (0 负责人)R (5,649 star) (1,890 fork)batch import
Difficulty: IntermediateEffort: LowHelp WantedPriority: LowType: Enhancement :bulb:

描述

Many times I want to do something along the lines of

conditionalPanel("input.test", "yep"),
conditionalPanel("!input.test", "nope")

Some syntactic sugar here would be awesome :) Hopefully the above could be translated into

conditionalPanel("input.test", iftrue = "yep", iffalse = "nope")

(clearly I'm not great at naming arguments)

贡献者指南

技术栈
无
领域
frontend
议题类型
feature
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。
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。
mostly clear
前置要求
Basic understanding of Shiny's conditionalPanelFamiliarity with R package development
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
This issue requests adding an ifelse like syntax to conditionalPanel. The implementation would involve modifying the conditionalPanel function in Shiny's R source, likely in R/conditionalpanel.R or similar. Look for existing similar patterns (e.g., tabPanel arguments) and ensure backward compatibility. There is no linked PR or maintainer comment, so the approach is open. Consider using ellipsis or named arguments to support iftrue and iffalse.