Question

我正在学习TypeScript，目前正在尝试koa，我认为我已经理解了函数定义，并且tsc同意，因为它可以很好地编译。另一方面，如果我尝试运行ts-node，它将失败，并显示以下错误。

const sequelize = new Sequelize(connectionURI(env));
                                ^
TypeError: connectionURI is not a function

我尝试更改导出和导入无济于事，甚至尝试操作tsconfig，但这几乎就像ts-node忽略了它一样。这些是我当前的设置

{
    "compilerOptions": {
      "target": "es2017",
      "module": "commonjs",
      "noImplicitAny": true,
      "declaration": true,
      "outDir": "./lib",
      "strict": true,
      "sourceMap": true,
      "resolveJsonModule": true,
    },
    "include": ["src/**/*.ts"],
    "exclude": ["node_modules", "**/__tests__/*",".vscode"]
  }

这是我尝试导入的模块

let connectionURI : (env: string) => string;

connectionURI = (env: string):string => {
    switch (env) {
      case 'development': {
        return 'uri';
      }
      default: {
        return ' ';
      }
    }
}

export = connectionURI

这是我的服务器。

import { Sequelize } from 'sequelize';
import * as app from './app';
import * as connectionURI from './conf/conf';

const port = process.env.PORT || 3000;
const env = process.env.NODE_ENV || 'development';
const sequelize = new Sequelize(connectionURI(env));
const server = app.listen(port);

console.info(`Listening to http://localhost:${port} `);

将导出更改为

export default {connectionURI}

和导入到

import connectionURI from './conf/conf';

我可以在一件事上使tsc和ts-node协调一致

Cannot invoke an expression whose type lacks a call signature. Type '{ connectionURI: (env: string) => string; }' has no compatible call signatures.

但是我想在功能足够之前就声明它，这是我做错了吗？

ts-node无法识别功能

0 个答案: