getXHRResponse.tsā¢1.09 kB
/**
* Gets what should be in the `response` property of the XHR. However,
* since we still support the final versions of IE, we need to do a little
* checking here to make sure that we get the right thing back. Consequently,
* we need to do a JSON.parse() in here, which *could* throw if the response
* isn't valid JSON.
*
* This is used both in creating an AjaxResponse, and in creating certain errors
* that we throw, so we can give the user whatever was in the response property.
*
* @param xhr The XHR to examine the response of
*/
export function getXHRResponse(xhr: XMLHttpRequest) {
switch (xhr.responseType) {
case 'json': {
if ('response' in xhr) {
return xhr.response;
} else {
// IE
const ieXHR: any = xhr;
return JSON.parse(ieXHR.responseText);
}
}
case 'document':
return xhr.responseXML;
case 'text':
default: {
if ('response' in xhr) {
return xhr.response;
} else {
// IE
const ieXHR: any = xhr;
return ieXHR.responseText;
}
}
}
}