Release 0.5.1 - 2026-06-14 · momiji-rs/sasso

Release Notes

Source-map fidelity + compressed-output corrections, all byte-exact vs
dart-sass 1.101.

Source maps: @media/@at-root/@supports bubbled parent selector. When
one of these at-rules nested in a style rule bubbles a copy of the enclosing
selector out (@media screen { .a { … } }), that copy now maps back to the
ORIGINAL rule's source position, matching dart-sass. It previously had no
mapping at all — which in compressed output also let the consecutive-same-
source-line coalescing drop a following declaration's mapping (a 0.5.0
regression vs 0.4.0 for @media/@at-root-bubbled rules). CSS is unchanged.
Source maps: @supports header. The @supports (…) at-rule header now
maps to its @supports keyword (as @media already did); previously it had
no mapping. CSS is unchanged.
Compressed @media/@supports whitespace. Compressed output now omits the
space before a prelude beginning with ( for @media/@supports
(@media(min-width: 1px)), and within a @media query drops the space before
and/or after a ) ((a)and (b)) and after the comma between queries
((a),(b)) — matching dart-sass. Other at-rules (@container) and @supports
conditions keep their spaces. (Compressed CSS output change; expanded
unchanged.)

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/momiji-rs/sasso/releases/download/v0.5.1/sasso-installer.sh | sh

powershell -ExecutionPolicy Bypass -c "irm https://github.com/momiji-rs/sasso/releases/download/v0.5.1/sasso-installer.ps1 | iex"

File	Platform	Checksum
sasso-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
sasso-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
sasso-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
sasso-aarch64-unknown-linux-gnu.tar.xz	ARM64 Linux	checksum
sasso-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum
sasso-aarch64-unknown-linux-musl.tar.xz	ARM64 MUSL Linux	checksum
sasso-x86_64-unknown-linux-musl.tar.xz	x64 MUSL Linux	checksum