palantir/blueprint

[select] On rerender / item list change, Suggest does not set active item to selected item

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#4,562 opened on Mar 4, 2021

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P3Package: selectType: bughelp wanted

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Description

Environment

  • Package version(s):
    • @blueprintjs/core: 3.39.0
    • @blueprintjs/select: 3.15.5
  • Operating System: all
  • Browser name and version: all

Code Sandbox

Link to a minimal repro: https://codesandbox.io/s/blueprint-sandbox-forked-rf75x?file=/src/index.tsx

Steps to reproduce

  1. Click Suggest input, note that 3 is active.
  2. Click "Reload item list," which simulates reloading list from network, etc.
  3. Click Suggest input, note that 1 is active instead 3, which is selected
  4. Blur focus on Suggest
  5. Click Suggest input again, note that active item finally resets to 3

Actual behavior

In step 3 above, the selected item is not active.

Expected behavior

In step 3, the selected item is active (assuming it's in the new list).

Possible solution

Might be that than maybeResetActiveItemToSelectedItem should be called in wider conditions than https://github.com/palantir/blueprint/blob/develop/packages/select/src/components/select/suggest.tsx#L157? But not too familiar with the implementation of Suggest.

Contributor guide

Research direction
Inspect the Suggest component's `maybeResetActiveItemToSelectedItem` function and its invocation conditions in `packages/select/src/components/select/suggest.tsx`. The issue is that when the item list changes, the active item is not reset to the selected item. Check the logic around line 157 and consider when the function should be called.
Tech stack
typescriptreact
Domain
frontend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitReactTypeScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70