Question $53$

What is the output of this code?

class Emitter $\{$

constructor$()\{$

this, events $=\{\}$;

$\}$

on$($type$,$ listener$)\{$

this.events$[$type$]=$ this,events$[$type$]||[]$;

this events $[$type$],$ push$($listener$)$;

$\}$

emit$($type$)\{$

if $($this$,$events$[$type$])\{$

this.events $[$type$].$ forEach$($listener $=>$ listener$())$;

$\}$

$\}$

$\}$

let myEmitter $=$ new Emitter$()$;

myEmitter.on$(\text{'}$click$\text{'},()=>$ console. event triggered!$\text{'}))$;

myEmitter, emit$(\text{'}$click$\text{'})$;

Click

Error

No output

Click event triggered!

Question $54$

what is the output of this code

console. $log("$Start$")$;

setTimeout $(()=>\{$

console.log$("$Timer Done"$)$;

$\},1000)$;

console. $log("$End$")$;

Start, Timer Done, End

Timer Done, Start, End

Start, End, Timer Done

End, Timer Done, Start