function getArticlesData(id, callback) {
// Simulate async operation
setTimeout(() => {
callback([{ username: ‘user1‘ }, { username: ‘user2‘ }]); // Dummy data
}, 1000);
}
// Simulate async operation
setTimeout(() => {
callback([{ username: ‘user1‘ }, { username: ‘user2‘ }]); // Dummy data
}, 1000);
}
function getUserData(username, callback) {
// Simulate async operation
setTimeout(() => {
callback(username + ‘_name‘); // Dummy transformation
}, 1000);
}
function getAddress(name, callback) {
// Simulate async operation
setTimeout(() => {
callback(name + ‘_address‘); // Dummy transformation
}, 1000);
}
// Calling the functions in a callback hell manner
getArticlesData(20, (articles) => {
console.log(“article lists“, articles);
// Assuming you want to process the first article in the list
getUserData(articles[0].username, (name) => {
console.log(name);
getAddress(name, (item) => {
console.log(item);
// This goes on and on…
});
});
});
