front end vs back end explained

13:01

9:13

3:32

9:03

1:36

2:15

9:09

9:57

10:33

8:23

کوتاه

18:03

2:15

9:30

10:56

2:37

9:16

3:36

10:21

5:40

کوتاه

23:39

10:01

7:38

3:05

1:36:16

20:35

29:11

6:39

10:11

9:03

51:48

8:38

11:51

12:05

2:14

1:50:34

1:32:10

14:50

1:06