cloudfour/pleasantest

Improve error message when trying to interact with element that is hidden because of low opacity

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#398 opened on Feb 2, 2022

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debuggability improvementgood first issue

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Description

Currently if you try to click/type an element that has low opacity to the point of not being visible, here is the error message:

Cannot perform action on element that is not visible (it is near zero opacity):
<...element ...>

It would be easier to debug if it cascaded up the DOM tree and printed out any non-opaque element:

Cannot perform action on element that is not visible (it is near zero opacity):
<input ...>

Its ancestor, this <div>, has an opacity of 0.02:
<div ...>

Or if there are multiple:

Cannot perform action on element that is not visible (it is near zero opacity):
<input ...>

Its ancestor, this <div>, has an opacity of 0.25:
<div ...>

Another ancestor, this <div>, has an opacity of 0.25:
<div ...>

Another ancestor, this <div>, has an opacity of 0.25:
<div ...>

This results in the <input> having a net opacity of 0.016, which is not visible.

Contributor guide

Research direction
Examine the error generation code in the testing library to understand how element visibility is determined and where to add ancestor opacity checks.
Tech stack
typescriptjest
Domain
testing qa
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitTypeScriptJavaScriptJest
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60