class Player $\{$

constructor$($name$,$ position$)\{$

this.name $=$ name;

this.position $=$ position;

$\}$

describe$()\{$

return $\text{'}$$$\{$this$.$name$\}$ plays $$\{$this$.$position$\}.\text{'}$;

$\}$

$\}$

class Team $\{$

constructor$($name$)\{$

this.name $=$ name;

this.players $=[]$;

$\}$

addPlayer$($player$)\{$

if $($player instanceof Player$)\{$

this.players.push$($player$)$;

$\}$ else $\{$

throw new Error$(\text{'}$You can only add an instance of Player. Argument is not a player: $$\{$player$\}\text{'})$;

$\}$

$\}$

describe$()\{$

return $\text{'}$$$\{$this$.$name$\}$ has $$\{$this$.$players.length$\}$ players.$\text{'}$;

$\}$

$\}$

class Menu $\{$

constructor$()\{$

this.teams $=[]$;

this.selectedTeam $=$ null;

$\}$

start$()\{$

let selection $=$ this.showMainMenuOptions$()$;

while $($selection $!=0)\{$

switch $($selection$)\{$

case $\text{'}1\text{'}$:

this.createTeam$()$;

break;

case $\text{'}2\text{'}$:

this.viewTeam$()$;

break;

case $\text{'}3\text{'}$:

this.deleteTeam$()$;

break;

case $\text{'}4\text{'}$:

this.displayTeams$()$;

break;

default:

selection $=0$;

$\}$

selection $=$ this.showMainMenuOptions$()$;

$\}$

alert$(\text{'}$Goodbye$!\text{'})$;

$\}$

showMainMenuOptions$()\{$

return prompt$(\text{'}$

$0)$ exit

$1)$ create new team

$2)$ view team

$3)$ delete team

$4)$ display all teams

$\text{'})$;

$\}$

showTeamMenuOptions$($teamInfo$)\{$

return prompt$(\text{'}$

$0)$ back

$1)$ create player

$2)$ delete player

$-----------------------$

$$\{$teamInfo$\}$

$\text{'})$;

$\}$

displayTeams$()\{$

let teamString $=\text{'}\text{'}$;

for $($let i $=0$; i $<$ this.teams.length; i$++)\{$

teamString $+=$ i $+\text{'})\text{'}+$ this.teams$[$i$].$name $+\text{'}$

$\text{'}$;

$\}$

alert$($teamString$)$;

$\}$

createTeam$()\{$

let name $=$ prompt$(\text{'}$Enter name for new team:$\text{'})$;

this.teams.push$($new Team$($name$))$;

$\}$

viewTeam$()\{$

let index $=$ prompt$(\text{'}$Enter the index of the team you wish to view:$\text{'})$;

if $($index $>-1$ && index $<$ this.teams.length$)\{$

this.selectedTeam $=$ this.teams$[$index$]$;

let description $=$ 'Team Name: $\text{'}+$ this.selectedTeam.name $+\text{'}$

$\text{'}$;

for $($let i $=0$; i $<$ this.selectedTeam.players.length; i$++)\{$

description $+=$ i $+\text{'})\text{'}+$ this.selectedTeam.players$[$i$].$name

$+\text{'}-\text{'}+$ this.selectedTeam.players$[$i$].$position $+\text{'}$

$\text{'}$;

$\}$

let selection $=$ this.showTeamMenuOptions$($description$)$;

switch $($selection$)\{$

case $\text{'}1\text{'}$:

this.createPlayer$()$;

break;

case $\text{'}2\text{'}$:

this.deletePlayer$()$;

$\}$

$\}$

$\}$

deleteTeam$()\{$

let index $=$ prompt $(\text{'}$Enter the index of the team you wish to delete:$\text{'})$;

if $($index $>-1$ && index $<$ this.teams.length$)\{$

this.teams.splice$($index$,1)$;

$\}$

$\}$

createPlayer$()\{$

let name $=$ prompt$(\text{'}$Enter name for new player:$\text{'})$;

let position $=$ prompt$(\text{'}$Enter position for new player:$\text{'})$;

this.selectedTeam.players.push$($new Player$($name$,$ position$))$;

$\}$

deletePlayer$()\{$

let index $=$ prompt$(\text{'}$Enter the index of the player you wish to delete:$\text{'})$;

if $($index $>-1$ && index $<$ this.selectedTeam.players.length$)\{$

this.selectedTeam.players.splice$($index$,1)$;

$\}$

$\}$

$\}$

let menu $=$ new Menu$()$;

menu.start$()$;

help debugg