stevenbenner/jquery-powertip

Uncaught TypeError: Cannot read property 'data' of null

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#169 创建于 2018年7月27日

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 (3 评论) (0 反应) (0 负责人)JavaScript (820 star) (144 fork)batch import
BugHelp Wanted

描述

I'm running powertip 1.3.1 and got the following exception:

jquery.powertip.js:964 Uncaught TypeError: Cannot read property 'data' of null
    at hideTip (jquery.powertip.js:964)
    at showTip (jquery.powertip.js:855)
    at HTMLDivElement.queueTipInit (jquery.powertip.js:829)
    at Function.dequeue (js_thirdp_libs.js:20)
    at HTMLDivElement.r.complete (js_thirdp_libs.js:20)
    at l (js_thirdp_libs.js:20)
    at Object.fireWith [as resolveWith] (js_thirdp_libs.js:20)
    at a (js_thirdp_libs.js:20)
    at v.fx.tick (js_thirdp_libs.js:20)

This was occuring while I was hovering over something with a powerTip, and an event comes in which causes another powerTip to open. It's not entirely consistent, and I believe it has todo with the opening and closing state of the hovered powertip.

As shown in the debugger below, it looks like isTipOpen is true, and it isn't closing, but activeHover is null.

image

贡献者指南

技术栈
javascript
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
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half day
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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 JavaScriptjQuery basics
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。
45
研究方向
Investigate the `hideTip` function in `jquery.powertip.js` around line 964. The error occurs when `activeHover` is null but `isTipOpen` is true, suggesting a race condition in tooltip state management. Focus on the logic that sets and clears `activeHover` and `isTipOpen` during show/hide transitions. Reproduce by rapidly hovering over elements to trigger overlapping tooltip events.