fs.writefile
<script>
// Requiring fs module in which
// writeFile function is defined.
const fs = require('fs')
// Data which will write in a file.
let data = "Learning how to write in a file."
// Write data in 'Output.txt' .
fs.writeFile('Output.txt', data, (err) => {
// In case of a error throw err.
if (err) throw err;
})
</script>
var fs = require('fs');
// Save the string "Hello world!" in a file called "hello.txt" in
// the directory "/tmp" using the default encoding (utf8).
// This operation will be completed in background and the callback
// will be called when it is either done or failed.
fs.writeFile('/tmp/hello.txt', 'Hello world!', function(err) {
// If an error occurred, show it and return
if(err) return console.error(err);
// Successfully wrote to the file!
});
// Save binary data to a file called "binary.txt" in the current
// directory. Again, the operation will be completed in background.
var buffer = new Buffer([ 0x48, 0x65, 0x6c, 0x6c, 0x6f ]);
fs.writeFile('binary.txt', buffer, function(err) {
// If an error occurred, show it and return
if(err) return console.error(err);
// Successfully wrote binary contents to the file!
});