没有出口会员 [英] Has no exported member

问题描述

我是Typescript的新手.我正在使用express js，但存在以下问题.当我运行服务器时，它显示为"...../routes.ts"没有导出的成员"router".我一直在搜索，但没有成功.这些是我的文件.

在我的src/index.ts

import "reflect-metadata"
import * as express from "express"
import { router } from "./routes"

async function main() {
 const app = express()
 app.get('/api',router)
 app.listen(3000, () => console.log("Server running"))
}

main()

在我的src/routes.ts中

import * as express from "express";
var router = express.Router();

router.route('/user').get((req, res) => res.send("Hello world"));

module.exports = router;

解决方案

这不是Typescript问题，您不会将router导出为命名导出，因此{ ... }语法将不起作用.

鉴于它似乎是默认导出，您可以使用

import router from './routes.js'

或者，如果您使用支持export语法的编译器，则可以将路由器导出为命名导出，即

export const router 

这将允许您通过{ router }导入.

I am new in Typescript. I am using express js and I have the folowing problem. When I run the server it appear '...../routes.ts' has no exported member 'router'. I ve been searching but I didnt succeed. These are my files.

In my src/index.ts

import "reflect-metadata"
import * as express from "express"
import { router } from "./routes"

async function main() {
 const app = express()
 app.get('/api',router)
 app.listen(3000, () => console.log("Server running"))
}

main()

In my src/routes.ts

import * as express from "express";
var router = express.Router();

router.route('/user').get((req, res) => res.send("Hello world"));

module.exports = router;

解决方案

This isn't a Typescript issue, you aren't exporting router as a named export so the { ... } syntax won't work.

Given it appears to be the default export, you can use

import router from './routes.js'

Alternatively, if you are using a transpiler that supports the export syntax, you could export your router as a named export i.e.

export const router 

This would allow you to import via { router }.

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