Question Question about Fs npm Module

[Lonster_Monster]

I am trying to get my steam bot to write to a file using the fs.write command here is what i got so far:

 

if (stock[item]){
    var item = ourItems.market_name;
         fs.writeFile(stock[item].instock, stock[item].instock - 1 , (err) => {
            if (err) throw err;
             console.log('The file has been saved!');
            });

}

 

but i keep getting

\app.js:291
 if (err) throw err;
                                                   ^

Error: EBADF: bad file descriptor, write
 

[xLeeJYx]

fs.writeFile('filename', content, function(err){

if(err){

console.log(err

)}

})

[Dr. McKay]

fs is not an npm module. It's built into Node.js.