Javascript 将应用程序表示为http.createServer的参数

当我想使用express.Application作为http.createServer的参数时，我有以下错误：

错误TS2345:类型为“Application”的参数不能分配给类型为“（请求：IncomingMessage，响应：ServerResponse）=>void”的参数。

我的代码：

import * as express from "express"
let app: express.Application = express();
...
import * as http from "http"
let httpServer = http.createServer(app);
httpServer.listen(process.env.HTTP_PORT, (): void => {
    console.log(`HTTP Listen on ${process.env.HTTP_PORT}`)
});

typings.json：

{
  "dependencies": {
    "body-parser": "registry:npm/body-parser#1.15.2+20160815132839",
    "express": "registry:npm/express#4.14.0+20160911114220"
  },
  "globalDependencies": {
    "dotenv": "registry:dt/dotenv#2.0.0+20160327131627",
    "errorhandler": "registry:dt/errorhandler#0.0.0+20160316155526",
    "express-serve-static-core": "registry:dt/express-serve-static-core#4.0.0+20160914120416",
    "method-override": "registry:dt/method-override#0.0.0+20160317120654",
    "morgan": "registry:dt/morgan#1.7.0+20160524142355",
    "node": "registry:dt/node#6.0.0+20160921192128"
  }
}

我解决它。 只需要更新打字。我当前的typings.json文件：

{
  "globalDependencies": {
    "dotenv": "registry:dt/dotenv#2.0.0+20160327131627",
    "errorhandler": "registry:dt/errorhandler#0.0.0+20160316155526",
    "express": "registry:dt/express#4.0.0+20160708185218",
    "express-serve-static-core": "registry:dt/express-serve-static-core#4.0.0+20160916114806",
    "method-override": "registry:dt/method-override#0.0.0+20160317120654",
    "morgan": "registry:dt/morgan#1.7.0+20160524142355",
    "node": "registry:dt/node#6.0.0+20160921192128",
    "serve-favicon": "registry:dt/serve-favicon#0.0.0+20160316155526"
  },
  "dependencies": {
    "body-parser": "registry:npm/body-parser#1.15.2+20160815132839",
    "serve-static": "registry:npm/serve-static#1.11.1+20160810053450"
  }
}

---

看起来你打字的不同之处在于你降低了速成版的等级。是这样吗？如果你能提供更多关于改变了什么以及为什么改变的信息，那会很有帮助。