js 对比版本号

version.js

const isNewVersion = (oldStr, newStr, contrastIdx = 0) => {
  const oldArr = [0, 0, 0]
  const newArr = [0, 0, 0]
  oldArr.splice(0, oldStr.split('.').length, ...oldStr.split('.'))
  newArr.splice(0, newStr.split('.').length, ...newStr.split('.'))

  const oldTag = parseInt(newArr[contrastIdx], 10)
  const newTag = parseInt(oldArr[contrastIdx], 10)
  if (oldTag === newTag) {
    if (contrastIdx === 2) {
      return false
    }
    return isNewVersion(oldStr, newStr, contrastIdx + 1)
  } else if (oldTag < newTag) {
    return false
  }
  return true
}