computer program javascript nvm node.js

How to export and import local modules in Javascript

Posted on October 5, 2019

Export and import local modules in Javascript

A lot of examples teach you how to import modules in html. But how do you import own-coded modules in JS file? Here is a simple example showing you how to do. More info refer to JS local modules. Main module test.js imports functions from demo_module.js, which is in the same folder as test.js

var mymodule = require('./demo_module.js');
console.log(mymodule.square(11));
console.log(mymodule.diag(4, 3));

In demo_module.js, export your modules 

var sqrt = Math.sqrt;
function square(x) {
    return x*x;
}
function diag(x, y) {
    let v = Math.sqrt(square(x) + square(y));
    return v;
};
module.exports.diag = diag;
module.exports.square = square;
CATALOG
  • javascript
  • node.js
  • import
  • export
  • module
  • html
  • jquery
  • react
  • bootstrap
  • wdpress
  • Cooking, 美食
  • AI
  • technology
  • audio fingerprint, music search
  • Cooking
  • 生活
  • 美食
  • Family
  • life
  • Algorithm
  • Machine learning
  • image understanding
  • Media industry
  • Pet
  • 宠物
  • health
  • Comment
  • 评论
  • office
  • media industry data science
  • travel
  • 旅游
  • 节日
  • data science
  • park
  • photograph
  • food
  • cookware
  • Programming language
  • dog food
  • sport
  • nature
  • book
  • fruit
  • video
  • 文化习俗
  • top news
  • investment,finance
  • Alumni
  • Computer
  • stock
  • visualization
  • sql
  • government
  • 回忆,memory
  • garden
  • event
  • animal
  • history
  • fintech
  • gpt
  • Python
  • AIGC
  • LLM
  • Python package
  • e-commerce
  • multimodal LLM
  • Singapore oversea scholarship
  • agent
  • API
    FEATURED TAGS
    computer program javascript nvm node.js Pipenv Python 美食 AI artifical intelligence Machine learning data science digital optimiser user profile Cooking cycling green railway feature spot 景点 work technology F1 中秋节 dog setting sun sql photograph Alexandra canal flowers bee greenway corridors programming C++ passion fruit sentosa Marina bay sands pigeon squirrel Pandan reservoir rain otter Christmas orchard road PostgreSQL fintech sunset thean hou temple in sungai lembing 海上日出 SQL optimization pieces of memory 回忆 garden festival ta-lib backtrader chatGPT stable diffusion webui draw.io streamlit LLM prompt engineering fastapi stock trading artificial-intelligence