oxc-browserslist

Rust port of Browserslist, forked from browserslist-rs.

The original crate did not meet the criteria of oxc, the following changes are made:

reduced compilation speed from one minute to a few seconds
improved some runtime performance, e.g. improve sort method, precompute versions
removed all unnecessary, heavy or slow dependencies: nom, time, ahash, chrono, either, indexmap, itertools, once_cell, string_cache, serde_json
reduced binary size through data compression and removal of config file support. 717K (this crate) vs 3.2M (original crate).

Usage

The following features are not supported, to align with Vite:

Config file loading (.browserslistrc, package.json browserslist field)
Environment variables (BROWSERSLIST, BROWSERSLIST_CONFIG, BROWSERSLIST_ENV)
extends query (e.g. extends browserslist-config-google)
Custom usage (> 0.5% in my stats or cover 99.5% in my stats)

Inspect query result by running the example:

cargo run --example inspect -- <query>

You can also specify additional options, for example:

cargo run --example inspect -- --mobile-to-desktop 'last 2 versions, not dead'

cargo test

Property-based tests generate random queries and compare results with the npm browserslist CLI.

# Install npm browserslist first
pnpm install

# Run property-based tests
cargo test --test proptest

Fuzzing tests use libFuzzer to find edge cases.

# Install cargo-fuzz
cargo install cargo-fuzz

# Run the fuzzer
cd fuzz
cargo +nightly fuzz run fuzz_resolve