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v2.2.0 Release

ยท 3 min read

This release includes several important improvements including

  • Lazily loading assembly refNames: previously when you had multiple assemblies in your config, it would load all their refNames at browser startup. Now, it only fetches refNames when you request to use an assembly.
  • Simplified "synteny track selector" on the dotplot and synteny import forms
  • Improved documentation! The entire jbrowse 2 documentation has been overhauled, and the monolithic user guide, config guide, and developer guide pages have been split into smaller pages. We also now auto-generate documentation on our config and state tree models, and have a search bar
  • Improved speed on alignments tracks: a small optimization was made for alignments tracks that can improve performance on alignments tracks by 30% or so especially on short reads

Figure showing improved speed on short read alignments of the refactor (this release) vs main (which was v2.1.7)

Note that the changes to allow lazy loading assemblies may have somewhat changed the "contract", so if your code is using the assemblyManager directly in any places, please be aware of this change. Proper usage of the assemblyManager API uses either

  1. use assemblyManager.get(assemblyName) which can return undefined initially, but then this initiates the lazy load and can be caught by reactivity of wrapping your components in observers
  2. use assemblyManager.waitForAssembly(assemblyName) function, which is asynchronous but returns a promise. this avoids the initial return undefined behavior
  3. avoid directly accessing e.g. assemblyManager.assemblies


To install JBrowse 2 for the web, you can download the link above, or you can use the JBrowse CLI to automatically download the latest version. See the JBrowse web quick start for more details.

2.2.0 (2022-11-04)โ€‹

๐Ÿš€ Enhancementโ€‹

  • Other
  • core
    • #3299 Add ability to open a synteny track directly from the dotplot/linear synteny view import forms (@cmdcolin)
    • #3287 Lazy-load assemblies on demand instead of all at app startup (@cmdcolin)
    • #3279 Remove unnecessary expanded region query and small refactors (@cmdcolin)

๐Ÿ› Bug Fixโ€‹

  • core
    • #3309 Fix animated "Loading..." message keyframes (@cmdcolin)
    • #3306 Fix the RefNameAutocomplete displaying a stale value for chromosome names (@cmdcolin)
    • #3302 Improve rubberband zooming across elided regions (@cmdcolin)
  • Other
    • #3293 Fix CRAM plotting for data files that encode insertions in uncommon way (@cmdcolin)

๐Ÿ“ Documentationโ€‹

๐Ÿ  Internalโ€‹

Committers: 3โ€‹