What do ^ and ~ allow?

^1.2.3 permits anything below 2.0.0; ~1.2.3 permits only 1.2.x. Below version 1.0.0 the caret narrows further, because the spec treats 0.x as unstable.

How do prereleases compare?

A prerelease has lower precedence than the release it precedes, so 1.0.0-rc.1 comes before 1.0.0. Build metadata after a plus sign is ignored entirely.

SemVer Comparator

Compare two versions correctly, including prerelease ordering.

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About this tool

Compares two version numbers by precedence and checks whether one satisfies an npm-style range. Each part is compared as a number, which is why 1.10.0 is correctly newer than 1.9.9 even though it sorts earlier alphabetically.

Limitations

Build metadata is ignored when ordering, as the specification requires.

Questions

What do ^ and ~ allow?: ^1.2.3 permits anything below 2.0.0; ~1.2.3 permits only 1.2.x. Below version 1.0.0 the caret narrows further, because the spec treats 0.x as unstable.
How do prereleases compare?: A prerelease has lower precedence than the release it precedes, so 1.0.0-rc.1 comes before 1.0.0. Build metadata after a plus sign is ignored entirely.

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