Node JS Express

Node Js Express

npm & Installation

npm init

npm i express

Require

// organization of a project
const express = require("express");
const compression = require("compression");
const cookieParser = require("cookie-parser");
const csrf = requrie("csurf");
const morgan = require("morgan");
const multer = require("multer");

`Initilasation Express`

const app = express();

EJS COde

app.use("/static", path.join(__dirname, "static"));
app.set("view engine", "ejs");
app.set("views", path.join(__dirname, "/views"));

BOdy Post

app.use(express .urlencoded({extended:true}));

`Routes`

//routers for nav bar .........
app.get("/",(req,res)=>{
    res.send("you are at now Home")
})
app.get("/about",(req,res)=>{
    res.send("About Us")
})
app.get("/Contect",(req,res)=>{

})

Port listen

app.listen(3000, (req,res)=>{
    console.log("you are running a posrt 3000")
})

Comments

react from handerler

form handler 1 step const [user ,setUser] = useState({ email : "" , password : '' }) // 2 step < input onChange = { handleChange } value = { user . email } id = "email-address" name = "email" type = "email" autocomplete = "email" required > //3 step < form onSubmit = { dataHandler } class = "mt-8 space-y-6" action = "#" method = "POST" > 4 step function handleChange (evt) { const value = evt . target . value; setUser({ ... user , [ evt . target . name ]: value }) ; 5 step const dataHandler = (e) => { e . preventDefault () console. log (user) }

ajeet

JavaScript Hash function

java Script hash code for genrating sam number as function hashCode ( string ) { let hash = 0 ; if (string. length == 0 ) { return hash; } for ( let i = 0 ; i < string. length ; i++) { let char = string. charCodeAt (i); hash = ((hash<< 5 )-hash)+char; hash = hash & hash; } return hash; } let input = document . querySelector ( "#input" ) let output = document . querySelector ( "#output" ) input. addEventListener ( "keyup" , () => { output. value = hashCode (input. value ) }) html < p > Enter text here </ p > < input type = "text" id = "input" > < p > 'Random' number outputted here </ p > < input type = "text" disabled = "disabled" value = "" id = "output" >

My Code

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