Difference between revisions of "Node Basics"

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== Node Modules ==
== Node Modules ==
[https://nodejs.org/api/ Nodejs api List]
<pre>
<pre>
console.log('starting app');
console.log('starting app');
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</pre>
</pre>


[https://nodejs.org/api/ Nodejs api List]


=== Use external packages in your project===
=== Use external packages in your project===
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  npm install lodash --save
  npm install lodash --save
  // the --save flag will update the content of the json file
  // the --save flag will update the content of the json file
[https://lodash.com/ Lodash API]
==[[#top|Back To Top]]-[[Main_Page| Home]] - [[NodeJS|Category]]==
==[[#top|Back To Top]]-[[Main_Page| Home]] - [[NodeJS|Category]]==

Revision as of 14:32, 3 April 2018

Run a Node App

terminal

node filename.js

You can execute node code in the terminal by typing

node 

This will give you a node command prompt

Node Modules

Nodejs api List

console.log('starting app');

const fs = require('fs');
const os = require('os');
 var user = os.userInfo();
 //console.log(user);
fs.appendFile('greet.txt', `hello${user.username}!` , (e)=>{
    if(e){
        console.log('error');
    }
});

Require your Own Files

const notes = require('./notes.js');

Notes.js file

module.exports.addNote = (a, b)=>{
var c = a + b;
return c;
};

Call the file in the app.js file


console.log('starting app');

const fs = require('fs');
const os = require('os');
const notes = require('./notes.js');
 var user = os.userInfo();
 var ret = notes.addNote(5,255);
//  console.log(user);
fs.appendFile('greet.txt', `hello${user.username}! you are ${ret}.` , (e)=>{
    if(e){
        console.log('error');
    }
});


Use external packages in your project

Go into the project directory

npm init
// answer questions. his will create a json file

Installing lodash Lodash is a set of handy utilities

npm install lodash --save
// the --save flag will update the content of the json file

Lodash API

Back To Top- Home - Category