So I have 4 tasks: getStatus()
, updateStatus(A)
, getTask()
, updateTask()
, it should be executed in this way:
getStatus(function(status) {
// A
updateStatus(status, function(status) {
// B
getTask(function(task) {
// C
updateTask(task, function(task) {
// D
})
})
})
})
So in order to avoid callback hell, I used promise, now all these four tasks return a Promise, then I changed it to this way
getStatus().then(function(status) {
// A
updateStatus(status).then(function(status) {
// B
getTask().then(function(task) {
// C
updateTask(task).then(function(task) {
//D
})
})
})
})
As you can see, it still has then hell
,
Am I doing something wrong with Promise?