node js create file if not exists code example

Example 1: nodejs fs create file if not exists

fs.exists(filename, function(exists) {
  if(exists) {
    // Create a file
  }
  else {
    console.log("Deny overwrite existing", filename);
  }
});

Example 2: fs create or edit file

//Edit file or creates if doesnt exist
 const fs = require('fs');
 fs.appendFile(‘<fileName>’,<content>,callbackFunction)