Identifiersflags: g

Semantic Version (SemVer)

Match semantic version strings like 1.2.3, 1.2.3-beta.1, or 1.2.3+build.42.

Available in

JavaScript / ECMAScript code

jsJavaScript

const re = new RegExp("(?:0|[1-9]\\d*)\\.(?:0|[1-9]\\d*)\\.(?:0|[1-9]\\d*)(?:-[\\w.]+)?(?:\\+[\\w.]+)?", "g");
const input = "1.0.0";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

Uses `String.prototype.matchAll` for global iteration (Node 12+ / all modern browsers).

Python (re) code

pyPython

import re

pattern = re.compile(r"(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-[\w.]+)?(?:\+[\w.]+)?")
input_text = "1.0.0"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

Go (RE2) code

goGo

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-[\w.]+)?(?:\+[\w.]+)?`)
	input := `1.0.0`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

Pattern

regexengine-agnostic

(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-[\w.]+)?(?:\+[\w.]+)?   (flags: g)

Raw source: (?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-[\w.]+)?(?:\+[\w.]+)?

How it works

Three numeric components (no leading zeros) separated by dots. Optional pre-release label after - and optional build metadata after + per the SemVer 2.0.0 spec.