# MapLibre GL JS v6.0.0-18

- Product: MapLibre GL JS (https://whatsnew.fyi/product/maplibre-gl-js)
- Vendor: MapLibre
- Date: 2026-06-29
- Version: v6.0.0-18
- Original notes: https://github.com/maplibre/maplibre-gl-js/releases/tag/v6.0.0-18
- Permalink: https://whatsnew.fyi/product/maplibre-gl-js/releases/v6.0.0-18
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Improve terrain rendering performance by avoiding unnecessary terrain data lookups during Mercator render-to-texture passes
- **changed** — Reduce allocation pressure while constructing DEM data and sampling terrain elevations
- **changed** — Reuse terrain DEM texture when preparing terrain
- **fixed** — Fix a memory leak where aborting a worker request left its promise pending forever, and Actor.sendAsync now rejects with an AbortError on abort

###### ✨ Features and improvements

- Improve terrain rendering performance by avoiding unnecessary terrain data lookups during Mercator render-to-texture passes ([#7833](https://github.com/maplibre/maplibre-gl-js/pull/7833)) (by [@DoFabien](https://github.com/DoFabien))
- Reduce allocation pressure while constructing DEM data and sampling terrain elevations ([#7814](https://github.com/maplibre/maplibre-gl-js/pull/7814)) (by [@DoFabien](https://github.com/DoFabien))
- Reuse terrain DEM texture when preparing terrain ([#7813](https://github.com/maplibre/maplibre-gl-js/pull/7813)) (by [@DoFabien](https://github.com/DoFabien))

###### 🐞 Bug fixes

- Fix a memory leak where aborting a worker request (e.g. a GeoJSON tile load cancelled while panning) left its promise pending forever, so the awaiting async frame and everything it captured was never released; `Actor.sendAsync` now rejects with an `AbortError` on abort ([#7826](https://github.com/maplibre/maplibre-gl-js/pull/7826)) (by [@kamil-sienkiewicz-asi](https://github.com/kamil-sienkiewicz-asi))