VersionCompare

versonCompare.js

function versionCompare(version1, version2) {
    //提取各个版本号并check
    let [a1, b1, c1, plus1] = matchVersionNumber(version1)
    let [a2, b2, c2, plus2] = matchVersionNumber(version2)

    //乘以数字自动将字符串转型成数字
    let result1 = a1 * 10000 * 10000 + b1 * 10000 + c1 * 1;
    let result2 = a2 * 10000 * 10000 + b2 * 10000 + c2 * 1;

    if (result1 !== result2) {
        if (result1 > result2) {
            return 1;
        } else {
            return -1;
        }
    }

    //然后比较 小版本
    if (plus1 > plus2) {
        return 1;
    } else if (plus1 === plus2) {
        return 0;
    } else {
        return -1;
    }
}

function matchVersionNumber(versionNumber) {
    let reg = /([0-9]{1,4})\.([0-9]{1,4})\.([0-9]{1,4})-?(beta|alpha)?/;
    let matchResult1 = versionNumber.match(reg)
    if (matchResult1 == null) {
        throw versionNumber + ' is not a valid version number'
    }
    let [match1, a, b, c, plus] = matchResult1;
    return [a, b, c, plus]
}

console.log(versionCompare('1.0.2-alpha', '1.0.1-beta'))