这个主要是我在开发时对于 这个responseCode有点疑惑，毕竟这里面的状态码可能大部分HTTP状态码都实现了，于是谷歌到这个问题，实际上和我有相同疑惑的人不在少数，看看他们是怎么回答的。www.v2ex.com/t/676678?p=…
实际上HTTP状态码有很多，简单看看MDN上的定义developer.mozilla.org/zh-CN/docs/…
列出来大概是这么多
declare enum HttpStatusCode {
Continue = 100,
SwitchingProtocols = 101,
Processing = 102,
EarlyHints = 103,
Ok = 200,
Created = 201,
Accepted = 202,
NonAuthoritativeInformation = 203,
NoContent = 204,
ResetContent = 205,
PartialContent = 206,
MultiStatus = 207,
AlreadyReported = 208,
ImUsed = 226,
MultipleChoices = 300,
MovedPermanently = 301,
Found = 302,
SeeOther = 303,
NotModified = 304,
UseProxy = 305,
Unused = 306,
TemporaryRedirect = 307,
PermanentRedirect = 308,
BadRequest = 400,
Unauthorized = 401,
PaymentRequired = 402,
Forbidden = 403,
NotFound = 404,
MethodNotAllowed = 405,
NotAcceptable = 406,
ProxyAuthenticationRequired = 407,
RequestTimeout = 408,
Conflict = 409,
Gone = 410,
LengthRequired = 411,
PreconditionFailed = 412,
PayloadTooLarge = 413,
UriTooLong = 414,
UnsupportedMediaType = 415,
RangeNotSatisfiable = 416,
ExpectationFailed = 417,
ImATeapot = 418,
MisdirectedRequest = 421,
UnprocessableEntity = 422,
Locked = 423,
FailedDependency = 424,
TooEarly = 425,
UpgradeRequired = 426,
PreconditionRequired = 428,
TooManyRequests = 429,
RequestHeaderFieldsTooLarge = 431,
UnavailableForLegalReasons = 451,
InternalServerError = 500,
NotImplemented = 501,
BadGateway = 502,
ServiceUnavailable = 503,
GatewayTimeout = 504,
HttpVersionNotSupported = 505,
VariantAlsoNegotiates = 506,
InsufficientStorage = 507,
LoopDetected = 508,
NotExtended = 510,
NetworkAuthenticationRequired = 511,
}
其实不难发现，这些都是在传输时定义的状态码，它大概率只能解释传输中的问题，比如你的服务是否正常返回一个200，你的服务不正常，返回一个404或者其他。而后端自定义的responseCode主要是为了定义业务问题，例如
const errCode = {
40000: '请求参数错误',
40001: '请求数据为空',
40100: '未登录',
40101: '无权限',
40301: '访问屏蔽',
50000: '系统内部异常',
}
简单来说，HTTP是传输层的定义，而responseCode是业务层的定义，二者互不相干。
