Semver Version Checker

How to Read Semver (Semantic Versioning)

Semantic versioning (SemVer) is the standard for versioning software. A version number is written as MAJOR.MINOR.PATCH (e.g. 2.1.4).

• MAJOR version when you make incompatible API changes. 2.0.0
• MINOR version when you add functionality in a backwards compatible manner. 1.2.0
• PATCH version when you make backwards compatible bug fixes. 1.1.2

Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format (e.g. 1.0.0-alpha.1+build.123).

Understanding NPM Version Constraints

Constraints allow you to specify a range of acceptable versions, most commonly used in `package.json` files.

• Caret (^): Allows changes that do not modify the left-most non-zero element. ^1.2.3 matches >=1.2.3 <2.0.0. ^0.2.3 matches >=0.2.3 <0.3.0.
• Tilde (~): Allows patch-level changes if a minor version is specified. ~1.2.3 matches >=1.2.3 <1.3.0.
• Exact (=): Matches an exact version. 1.2.3 or =1.2.3 only matches exactly that version.
• Wildcard (*): Matches any version. You can also use 1.x or 1.2.x.