expressjs typescript code example

Example 1: express typescript tsconfig

// it can vary a lot, but this is a beggining

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "outDir": "./dist",
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "esModuleInterop": true
},
  "include": ["src/**/*"],
  "exclude": ["node_modules", "**/*.test.ts"]
}

Example 2: express ts

import express = require('express');

// Create a new express application instance
const app: express.Application = express();

app.get('/', function (req, res) {
  res.send('Hello World!');
});

app.listen(3000, function () {
  console.log('Example app listening on port 3000!');
});

Example 3: express typescript

try this config for nodejs + typescript using babel

https://pastebin.com/TR4BXPqL

Example 4: expressjs typescript test

import { expect } from "chai"
import chai from "chai"
import chaiHttp from "chai-http"
chai.use(chaiHttp);
import express from "express"
import { createHttpTerminator, HttpTerminatorConfig } from "http-terminator"

const testServer: express.Application = express()
let serverRef, httpTerminator: any
describe('Test Description', () => {
    before(() => {
        testServer.get('/toto', (req, res) => {
            res.send('Hello World')
        })
        testServer.get('/tata', (req, res) => {
            res.send('Hello tata')
        })
        serverRef = testServer.listen(3000, function () {
            // console.log('App is listening on port 3000!');
        });
        httpTerminator = createHttpTerminator({ server: serverRef });

    })
    after(async () => {
        await httpTerminator.terminate();
    })
    it('test toto', (done) => {
        chai.request('http://localhost:3000')
        .get('/toto')
        .end(function(err, res) {
            expect(res).to.have.status(200);
            expect(res.text).to.eq('Hello World');
            done(); 
          });
    })
    it('test tata', (done) => {
        chai.request('http://localhost:3000')
        .get('/tata')
        .end(function(err, res) {
            expect(res).to.have.status(200);
            expect(res.text).to.eq('Hello tata');
            done(); 
          });
    })
})