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Start your free trialHernan Diaz
7,197 PointsWhy do we return callback return in getJSON(), this return is not used?
function getJSON(url, callback) {
const xhr = new XMLHttpRequest();
xhr.open('GET', url);
xhr.onload = () => {
if(xhr.status === 200) {
let data = JSON.parse(xhr.responseText);
return callback(data); // <<<<<<<=========== HERE, we don't need it, do we?
}
};
xhr.send();
}
1 Answer
Farid Lavizadeh
12,006 PointsI believe it's used for the parameter (json). Then json.people.map uses the "data" as argument for json.