Semantic-Org/Semantic-UI-React

Dropdown scroll position going top when adding options

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#3,721 建立於 2019年7月26日

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help wantedneeds engineering

描述

Hello,

I did search in the 30+ issues opened but did not see anything similar. Here is the bug I've encountered :

Bug Report

When modifying options of a Dropdown while you are scrolling inside of it, the scroll position going full top.

Expected Result

Scroll staying on actual position

Actual Result

Scroll reseting to top

Version

SUIR@0.87.3

Testcase

In this Testcase, I simulated addition of elements when clicking on a button. FYI, in my reality case, I am doing an infinite scroll, which is adding elements when needed.

https://codesandbox.io/s/semantic-ui-react-example-1xvv7?fontsize=14

貢獻者指南

技術棧
javascriptreact
領域
frontend
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
ReactSemantic UI React basics
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
70
研究方向
The issue reports that the Dropdown component's scroll position resets to top when its options are modified while scrolling. The testcase in the issue shows adding options via a button. The likely cause is that the component re renders and resets the scroll position. Investigate the Dropdown component source code, typically in `src/modules/Dropdown/Dropdown.js`. Look for how the scroll position is managed, possibly via a ref or state. The fix may involve preserving the scroll position before re render and restoring it after. Check if there are any lifecycle methods or hooks that handle this. Since the issue is old and unassigned, no linked PRs or comments exist.