metro/react-packager/example_project/js/XHR.js

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JavaScript
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/**
* @providesModule XHR
*/
function request(method, url, callback) {
var xhr = new XMLHttpRequest();
xhr.open(method, url);
xhr.onreadystatechange = function() {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
callback(null, xhr);
} else {
callback(new Error('status = ' + xhr.status, xhr));
}
}
};
xhr.send();
}
exports.get = function(url, callback) {
request('GET', url, callback);
};