Node. js + express makes a webpage calculator, node. jsexpress

Node. js + express makes a webpage calculator, node. jsexpress

Environment:

HOST: WIN10

Express installation:

1. Install express-generator

Enter the following command:

npm install -g express-generator

2. Install express

Enter the following command:

npm install -g express

3. verify whether the installation is successful

Enter the command: express-V

View help: express -- help

Project Creation:

express -e calculatorcd calculator && npm install

Run the default webpage:

Run npm start or node./bin/www.

The port is configured in/bin/www.

You can perform addition operations.

Source code:

View/index. ejs: Add input box

<! DOCTYPE html> 
Routes/index. js: calculates the submitted data and pushes the results.
Var express = require ('express '); var router = express. router ();/* GET home page. */router. get ('/', function (req, res, next) {res. render ('index', {title: 'calculator V1.0 by jdh ', numa: 0, numb: 0, sum: 0}) ;}); router. post ('/', function (req, res) {console. log ("receive:", req. body. num1, req. body. num2); var sum = parseFloat (req. body. num1) + parseFloat (req. body. num2); console. log ('sum = ', sum); res. render ('index', {title: 'calculator V1.0 by jdh ', // numa: req. body. num1, // numb: req. body. num2 numa: req. body. num1, numb: req. body. num2, sum: sum}) ;}); module. exports = router;

Articles you may be interested in:

 

 
  
Getting started with node. js Web application framework Express
 
  
Express author TJ say goodbye to Node. js and rush to Go
 
  
Getting started with Node. js, Express, Ejs, Mongodb server and application development
 
  
Install and configure the node. js + express development environment in win7