People who know which team on js the commands of other WEB languages ​​are being executed

Question

People who know which team on js the commands of other WEB languages ​​are being executed

Answer 1

what is team refers to

Answer 2

backend developer

Answer 3

what?

Answer 4

Well, let's say there is an animation and write the text body {
backgruund-color: red:
}
after some time it must be fulfilled
as?