How to use iframe request in (cross-domain)?

Question

I want to make a cross-domain post request, I use a form that targets an iframe to send the request.

var iframe = document.createElement("iframe");

var uniqueString = "CHANGE_THIS_TO_SOME_UNIQUE_STRING";

document.body.appendChild(iframe);

iframe.style.display = "none";

iframe.contentWindow.name = uniqueString;


var form = document.createElement("form");

form.target = uniqueString;

form.action = myUrl;

form.method = "POST";


// repeat for each parameter

var input = document.createElement("input");

input.type = "hidden";

input.name = "setting";

input.value = params;

form.appendChild(input);

document.body.appendChild(form);

form.submit();

iframe.onload = iframe.onreadystatechange = function(){

if(this.readyState && this.readyState!="complete") return ;

else{                                                                            
       alert("haha");                                                
}
};

Chrome shows iframe is getting return data from remote url, but I can't get iframe content using Javascript? Do you have any tips or solutions?

Answer 1

GUID. GUID . , JSONP GUID, , .