palantir/blueprint

Tabs: Using expander and resizing window causes indicator to hang behind

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#1,035 opened on Apr 25, 2017

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P3Package: coreType: enhancementhelp wanted

Description

Not sure how much responsiveness you all are designing for but noticed this bug today. Tab indicator seems to be fine when not using the expander.

Bug report

  • Package version(s): Blueprint Core 1.15
  • Browser and OS versions: Chrome 58

Steps to reproduce

  1. Add a Tabs2.Expander to push tabs to the right of your Tabs2 component
  2. Open browser window at half size
  3. Resize browser window to full screen
<Tabs2
          id="PlateAndTableView"
          onChange={this.handleTabChange}
          renderActiveTabPanelOnly={true}
        >
          <h2> Plate Contents </h2>
          <Tabs2.Expander />
          <Tab2 id="plate" title="Plate View" panel={<PlateWellsViewContainer />} />
          <Tab2 id="table" title="Table View" panel={<TablePanel />} />
</Tabs2>

Actual behavior

Expected behavior

Contributor guide

Tech stack
reacttypescriptcss
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.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
None
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
The issue describes a bug where the tab indicator hangs behind when using the expander and resizing the window. To reproduce, add a Tabs2.Expander and resize from half to full screen. The root cause likely lies in the component's resize handling or CSS transitions. Start by examining the Tabs2 component source in the repository, particularly the relevant CSS and JavaScript for calculating indicator position. Check the comments on the issue for any suggested fixes or discussions.