Semantic-Org/Semantic-UI-React

Dropdown scroll position going top when adding options

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#3,721 创建于 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

贡献者指南

技术栈
javascriptreact
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
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。
half day
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
ReactSemantic UI React 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。
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.