Validates "v1" or "v0.1" or "v0.0.1" but not "v01" nor "v1.01" nor "v0.0.01" nor "vRegExp"

getValidatedVersionParam.js

const regExVersion = new RegExp([
   // starts with "v" ➔ v1, v2, v56, v100 works. vv1, 12345, 1.2.3 fails.
   "^(?:v)",
   // major version: either "0" or a number that not starts with 0.  ➔  v01 fails
   "(?<major>(?:[1-9][0-9]*)|(?:0))",
   // minor version (optional) - same as major  ➔  v1.1, v0.1, v2.15, v9, v9.0, v9.9 works. v9.09 fails
   "(?:\.(?<minor>(?:[1-9][0-9]*)|(?:0)))?",
   // revision (optional too) - same as major  ➔  v1.2.3, v0.0.1, v9.0.9 works, v0.0.0, v6.5.04 fails.
   "(?:\.(?<revision>(?:[1-9][0-9]*)|(?:0)))?",
  "$"
].join(""),
"i"); // Global + case Insensitive

const DEFAULT_API_VERSION = "v0.0.1";

function getValidatedVersionParam(version) {
  let strVersion = version;

  if (typeof strVersion === "string" && regExVersion.test(strVersion)) {
    return strVersion;
  }
  
  if (!strVersion) {
    return DEFAULT_API_VERSION;
  }

  const isVersionValidNumber = typeof version === "number" && !isNaN(version);
  if (isVersionValidNumber) {
    strVersion = `v${version}`;
    if (regExVersion.test(strVersion)) {
      return strVersion;
    }
  }

  const isVersionAllNumbers = Array.isArray(version) && version.every(vp => Number.isFinite(+vp));
  if (isVersionAllNumbers) {
    strVersion = `v${version.join(".")}`;
    if (regExVersion.test(strVersion)) {
      return strVersion;
    }
  }

  return DEFAULT_API_VERSION;
}

getValidatedVersionParam.ts

const regExVersion = new RegExp([
   // starts with "v" ➔ v1, v2, v56, v100 works. vv1, 12345, 1.2.3 fails.
   "^(?:v)",
   // major version: either "0" or a number that not starts with 0.  ➔  v01 fails
   "(?<major>(?:[1-9][0-9]*)|(?:0))",
   // minor version (optional) - same as major  ➔  v1.1, v0.1, v2.15, v9, v9.0, v9.9 works. v9.09 fails
   "(?:\.(?<minor>(?:[1-9][0-9]*)|(?:0)))?",
   // revision (optional too) - same as major  ➔  v1.2.3, v0.0.1, v9.0.9 works, v0.0.0, v6.5.04 fails.
   "(?:\.(?<revision>(?:[1-9][0-9]*)|(?:0)))?",
  "$"
].join(""),
"i"); // Global + case Insensitive

type TVersionParam = string | number | number[] | null | undefined;

const DEFAULT_API_VERSION: string = "v0.0.1";

function getValidatedVersionParam(version: TVersionParam): string {
  let strVersion = version;

  if (typeof strVersion === "string" && regExVersion.test(strVersion)) {
    return strVersion;
  }
  
  if (!strVersion) {
    return DEFAULT_API_VERSION;
  }

  const isVersionValidNumber = typeof version === "number" && !isNaN(version);
  if (isVersionValidNumber) {
    strVersion = `v${version}`;
    if (regExVersion.test(strVersion)) {
      return strVersion;
    }
  }

  const isVersionAllNumbers = Array.isArray(version) && version.every(vp => Number.isFinite(+vp));
  if (isVersionAllNumbers) {
    strVersion = `v${version.join(".")}`;
    if (regExVersion.test(strVersion)) {
      return strVersion;
    }
  }

  return DEFAULT_API_VERSION;
}