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Promise constructor
function getSomeJSON(url, callback) {
// AJAX call to get data from server. Accepts callback and calls
// with callback(err, response)
...
}
function fetchJSON(url) {
return new Promise(function (resolve, reject) {
getSomeJSON(url, function (err, response) {
if (err) return reject(err);
resolve(response);
});
});
}
fetchJSON("http://www.google.com").then(..);
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