Get data from fs.readFile

Question

var content;
fs.readFile(\'./Index.html\', function read(err, data) {
    if (err) {
        throw err;
    }
    content = data;
});
console.log(content);
         


        

Answer 1

you can read file by

var readMyFile = function(path, cb) {
      fs.readFile(path, 'utf8', function(err, content) {
        if (err) return cb(err, null);
        cb(null, content);
      });
    };

Adding on you can write to file,

var createMyFile = (path, data, cb) => {
  fs.writeFile(path, data, function(err) {
    if (err) return console.error(err);
    cb();
  });
};

and even chain it together

var readFileAndConvertToSentence = function(path, callback) {
  readMyFile(path, function(err, content) {
    if (err) {
      callback(err, null);
    } else {
      var sentence = content.split('\n').join(' ');
      callback(null, sentence);
    }
  });
};