NodeJS FileSystem
const http = require('http');
//require the http module
const port = 4500 ;
// assign the port
//create a server then using res write on the web page
const server = http.createServer((rej,res)=>{
res.write("hellow");
res.end();
//end the server
})
//listen on port
server.listen(port , ()=>{
console.log(`server started on port :${port}`);
})
taak na bhainpm
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const fs = require('fs');
//read the data of the existing file
fs.readFile('demo.txt' ,(error , data )=>{
if(error){
console.log(error);
}
else{
console.log(data);
console.log(data.toString());
}
})
// it will create a file if not created and write data into that file
fs.writeFile('new.txt' , "hey bro " ,(error)=>{
if(error){
console.log(error);
}
else{
console.log("succesful");
}
})
// append data to already existing file
fs.appendFile('new.txt' , "whats app " ,(error)=>{
if(error){
console.log(error);
}
else{
console.log("appeedn works ");
}
})
// to delete the existing file
fs.unlink('new.txt' , (error)=>{
if(error){
console.log(error);
}
else{
console.log("done deleting");
}
})
// rename the already existing file
fs.rename('file.txt' , 'demo.txt' , (err)=>{
if(err){
console.log(err);
}
else{
console.log("file rename done");
}
})
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