stevenbenner/jquery-powertip

Uncaught TypeError: Cannot read property 'data' of null

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#169 opened on 2018年7月27日

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BugHelp Wanted

説明

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

コントリビューターガイド

技術スタック
javascript
領域
frontend
Issue 種別
bug
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
3
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
half day
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
stale
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
mostly clear
前提条件
basic JavaScriptjQuery basics
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
45
調査方針
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.