JavaScript assigning value to variable from callback function

Question

I'm trying to assign a value to variable from a callback, but in console.log it shows me undefined.

What am I doing wrong?

var threadsList = threads(data => {
  return data
})

console.log(threadsList)

Possible duplicate of [How does Asynchronous Javascript Execution happen? and when not to use return statement?](https://stackoverflow.com/questions/7104474/how-does-asynchronous-javascript-execution-happen-and-when-not-to-use-return-st) — Emile Bergeron, Jun 16 '17 at 02:31
Your arrow function is returning data to `threads()` If `threads()` is not returning that data back, it will not be going into `threadsList` As an illustration try `var threadsList = threads(data => { console.log(data); })` This should log your data showing you that the callback was called. — mhatch, Jun 16 '17 at 19:57

score 0 · Answer 1 · edited Jun 16 '17 at 05:50

0

Solved!

threads(data => {
  this.$data.threads = data
})

edited Jun 16 '17 at 05:50

Gerard

answered Jun 16 '17 at 03:02

Johnny Anderson

1 Answers1