schickling/chromeless

.visible API

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#33 opened on Jul 26, 2017

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 (4 comments) (7 reactions) (0 assignees)TypeScript (13,240 stars) (606 forks)batch import
APIdiscussionfeaturehelp wanted

Description

Ensures that's elements are visible (which is a hard thing to implement in a .evaluate as there's a whole host of things that can make something invisible).

Contributor guide

Tech stack
typescript
Domain
testingfrontend
Issue type
feature
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.
half day
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.
mostly clear
Prerequisites
JavaScriptDOM visibility concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
The issue requests a `.visible` API to check element visibility. Chromeless uses a `.evaluate` method to run scripts. Research how visibility is determined in web pages (CSS `display`, `visibility`, `opacity`, bounding rect). Look at existing `.visible` implementations in other headless browsers (e.g., Puppeteer's `isIntersectingViewport`). Check comments in issue #33 for any proposed approaches. The project is archived, so consider the feasibility of contributing to an archived repository.