Scope of variable isn't global?

1

Can anyone tell me why “zip” is still undefined after defining it in the .getJSON function? http://codepen.io/david_vu408/pen/JErXdW

3

The getJSON is asynchronous so your alert returns BEFORE that zip assignment, u should give zip a default value while waiting for getJSON to give u back the data.
Try

var zip = something ;
  $.getJSON("http://ip-api.com/json/?callback=?", function(data) {
    zip = data.zip;
  });
  window.alert(zip);

Or

var zip = something ;
  $.getJSON("http://ip-api.com/json/?callback=?", function(data) {
    zip = data.zip;
    window.alert(zip);
  });