Access nested json objects in node.js

Question

I am trying to access a nested JSON object, but I am getting Cannot read property 'module' of undefined .

Here is the JSON file.

{
  "server": {
    "module": {
      "InPluginPath": "/usr/home/nah/Website/server/httpModule.js"
    }
  }
}

Then when I try to access the JSON object after reading the file with fs.readFile() , I get the Cannot read property 'module' of undefined , error. Below is the line that causes the error.

console.log(config.server.module.InPluginPath);

Answer 1

You need to JSON.parse() the resulting string from fs.readFile() . For example:

fs.readFile('/tmp/foo.json', { encoding: 'utf8' }, function(err, data) {
  if (err) throw err;
  try {
    data = JSON.parse(data);
  } catch (ex) {
    console.log('Error parsing json');
    return;
  }
  console.log(data.server.module.InPluginPath);
});