semver.js

export class SemanticVersion {
    static re = /^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$/

    constructor() {
        this.major = 0;
        this.minor = 0;
        this.patch = 0;
        this.preRelease = "";
        this.buildMetaData = "";
    }

    static fromString(str) {
        if (str.match(this.re)) {
            let result = new this();
            result.major = parseInt(RegExp.$1);
            result.minor = parseInt(RegExp.$2);
            result.patch = parseInt(RegExp.$3);
            result.preRelease = RegExp.$4 || "";
            result.buildMetaData = RegExp.$5 || "";
            return result;
        }
        return null;
    }

    isHigherThan(otherVersion) {
        if (this.major > otherVersion.major) return true;
        if (this.major === otherVersion.major && this.minor > otherVersion.minor) return true;
        if (this.major === otherVersion.major
            && this.minor === otherVersion.minor
            && this.patch > otherVersion.patch) return true;
        return false;
    }

    isLowerThan(otherVersion) {
        if (this.major < otherVersion.major) return true;
        if (this.major === otherVersion.major && this.minor < otherVersion.minor) return true;
        if (this.major === otherVersion.major
            && this.minor === otherVersion.minor
            && this.patch < otherVersion.patch) return true;
        return false;
    }
}