back js...
01 - pengenalan asynchronous
02 - callback
03 - ajax
04 - menerima data
05 - response status
06 - state di ajax
07 - hookbin
08 - mengirim data
09 - url search param
10 - form data ajax
11 - upload file ajax
12 - promise
13 - promise method
14 - promise static method
15 - fetch api
16 - fetch api 2
17 - asynch wait
18 - await
19 - error handler asynch await
20 - web worker