Question

I would like to be able to pass a parameter in a callback, but from the original calling function, and with the stipulation below, e.g. given:

function foo() {
  var p = 5;
  getDataFromServer(callBackFunction);
}

function callBackFunction(data) {
  // I need value of 'p' here
  ...
}

function getDataFromServer(callback) {
  // gets data from server
  callback.call();
}

The catch is that I don’t want to change the function getDataFromServer(), (i.e. allowing it to accept another parameter.)

Is this possible? Thanks.

Answer 1

Yes, and this is good to know.

function foo() {
  var p = 5;
  getDataFromServer(function(){
     callBackFunction(p)
  });
}