How to create and write data into a txt text file in Nodejs?

const fs = require('fs');
fs.writeFileSync('/tmp/file_name.txt', 'Hey txt file!');

const fs = require('fs');
fs.writeFile("/tmp/file_name.txt", "Test txt file", function(err) {
    if(err) {
        return console.log(err);
    }
    console.log("Your file was saved!");
}); 

var fs = require('fs');
var stream = fs.createWriteStream("your_file.txt");
stream.once('open', function(fd) {
  stream.write("Line data 1 \n");
  stream.write("Line data 2\n");
  stream.write("Line data 3\n");
  stream.end();
});

fs = require('fs');
fs.writeFile('helloworld.txt', 'Hello World!', function (err) {
    if (err) 
        return console.log(err);
    console.log('Wrote Hello World in file helloworld.txt');
});