mapbox/mapbox-gl-js

hasFeatures function

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#7,813 opened on Jan 24, 2019

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 (11 comments) (0 reactions) (0 assignees)JavaScript (10,532 stars) (2,203 forks)batch import
feature :green_apple:good first issueneeds discussion :speech_balloon:

Description

Would it be possible to add a function that checks if there are any features in a query? It would work like queryRenderedFeatures but only return true or false.

This would make it more efficient to query if there are any areas under the mousepointer for changing the cursor style.

Contributor guide

Tech stack
javascript
Domain
frontend
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.
clear
Prerequisites
familiarity with mapbox gl js APIunderstanding of queryRenderedFeatures
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
The issue requests a new hasFeatures function that returns a boolean instead of an array. The implementation should likely mirror queryRenderedFeatures but exit early upon finding the first feature. Look at the source code for queryRenderedFeatures in the repository (e.g., src/ directory) to understand parameters and implementation. The discussion in the issue comments may provide additional context on expected behavior and performance considerations. No linked PRs or maintainer responses clarify scope.
hasFeatures function · mapbox/mapbox-gl-js#7813 | Good First Issue