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# Semver Compare

Sort versions, compare two, and test npm ranges — strict SemVer 2.0.0, coercion shown separately.
Analyze a listCompare twoTest a rangeInsert sampleClearVersions, one per line

Newest

2.0.0

Ascending

1.0.0+build.7 < 1.2.3-beta.11 < 1.2.3 < 1.9.3 < 1.10.0 < 2.0.0-rc.1 < 2.0.0

 Line Strict Read as npm would coerce
 2.0.0 yes 2.0.0 —
 1.9.3 yes 1.9.3 —
 1.10.0 yes 1.10.0 —
 2.0.0-rc.1 yes 2.0.0-rc.1 —
 1.2.3-beta.11 yes 1.2.3-beta.11 —
 v1.2.3 yes 1.2.3 —
 1.0.0+build.7 yes 1.0.0+build.7 —

- Strict SemVer 2.0.0 parse (the semver package, non-loose): a single leading v is accepted, = is not — measured against the installed engine and pinned in tests, disclosed here.
- Comparison is spec precedence: numeric identifiers numerically, alphanumeric lexically, a prerelease sorts before its release, and +build metadata is ignored by comparison entirely (spec §10) — reported as its own fact when it is the only difference.
- Ranges are node-semver syntax, including the tuple-scoped prerelease rule: a range with a prerelease comparator only unlocks prereleases of that same major.minor.patch — 1.1.0-beta.1 does NOT satisfy ^1.0.0.
- Coercion is a separate, lossy answer (“what npm would coerce this to”), never mixed into the strict verdict.
Done

Finished here in the tab. Nothing was uploaded.

sorting uses spec precedence — 1.10.0 > 1.9.3, not string order

## Next door in Developer

- [Regex tester](/dev/regex-tester)
- [Glob tester](/dev/glob-tester)
[All developer tools](/dev)

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Canonical HTML: https://nutter.tools/dev/semver
Markdown version: https://nutter.tools/dev/semver/index.md
Plain-text version: https://nutter.tools/dev/semver/index.txt
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