Question

I have a script where I get some data through JSON, this is like :

$.getJSON('phpfile', function(data) { ...

it works perfectly when I receive some data but when its empty, I get the next error :

Uncaught TypeError: Cannot read property ‘length’ of null

Where I get this error is a line like this one :

if(data==null){
 //actions if the JSON is doesnt give me data
}else{
 //actions if I get data
}

What I want is to control when JSON sends data or not, how can I do it ?

EDIT: I get the error with $.each(data, function(key, val) { when data is a null object, when json doesn’t get any data.

Thanks in advance

Answer 1

$.getJSON('phpfile', function handleSuccess(data) {
    if(!data){ 
          //handle if null or undefined
    }else{
         //actions if I get data
    }
    }).error(function handleErrorCase(){
        //handle error i.e. your server returning something other 200 or not json
    };