text 如何制作nodejs api模块

Posted 2021-04-30

// use express-generator(optional)

//잡지식
* express -h (사용법)
* Ctrl+D (동시 셀렉트)
* var -> let, ; delete (optional)

//express install
npm i express-generator
express app
cd myapp
npm install (필요 npm 자동 설치 (essential))
npm install body-parser

// make module

1. make 'lib' forder under myapp
2. make module script(example->calculator.js) under lib forder
3. connect app.js with module script

app.js

let cal = require('./lib/calculator')
console.log(cal.test.sum(1,2))
console.log(cal.test.avg(1,2))

calculator.js

let test = {
  sum:function(a, b){
    return a+b
    },
  avg:function(a, b){
    return test.sum(a,b)/2
    }
  }
  
  module.exports.test = test

// make npm api
https://docs.npmjs.com/creating-node-js-modules