I want to bring a single value from my json file

Question

This brings me all the values of the json file

Example: I have id, name and lastname, I want to bring the id value

  fs.readFile("user.json", function (err, data) {
    if (err) throw err;
    console.log(data.toString());
});

info file json

{"Identificador":0,"Nombre_Principal":"man","Nombre_Paterno":"man","Nombre_Materno":"man","Contrasena":"man","Correo":"man@man.com","Posicion":"User","Token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1bmlxdWVfbmFtZSI6Im1hbiIsIm5iZiI6MTU0MjgzODU5OCwiZXhwIjoxNTQyODQwMzk4LCJpYXQiOjE1NDI4Mzg1OTgsImlzcyI6Imh0dHA6Ly9sb2NhbGhvc3Q6NjUyMjQiLCJhdWQiOiJodHRwOi8vbG9jYWxob3N0OjY1MjI0In0.W9Tck4QjzCoP2g0CdFIsmshSUoZbzi8AmzR9EnRYIVQ","Estatus":0}

Use JSON.parse() then access what you need as you would with any JavaScript object — charlietfl, Nov 22 '18 at 01:48
@Brad What are you talking about? What was given is fine. An actual JSON file is not needed to answer this question. — Spencer Wieczorek, Nov 22 '18 at 02:03
@SpencerWieczorek The whole question is how to access properties of an object. Seeing an actual structure is helpful. — Brad, Nov 22 '18 at 02:05
I have more, but the only thing I use to call the json is what I wrote above — Manuel Rodriguez, Nov 22 '18 at 02:08
@ManuelRodriguez This is sufficient, thanks for updating your question! — Brad, Nov 22 '18 at 02:08
Possible duplicate of [Read json file content with require vs fs.readFile](https://stackoverflow.com/questions/35389060/read-json-file-content-with-require-vs-fs-readfile) — Spencer Wieczorek, Nov 22 '18 at 02:08
@SpencerWieczorek This question appears to be for Node.js (see the updated tags), and isn't quite a duplicate of what you linked to. — Brad, Nov 22 '18 at 02:10

score 1 · Accepted Answer · answered Nov 22 '18 at 02:07

Before you can access the actual data inside the string containing JSON, you have to parse it first. Use JSON.parse() for this.

fs.readFile('user.json', function (err, data) {
  if (err) throw err;
  data = JSON.parse(data);  // Convert JSON into an actual JavaScript object
  console.log(data.Identificador); // Access object properties with the dot `.` notation
});

I want to bring a single value from my json file

1 Answers1