Question

I would like to know if I need to add semicolon after the constructor. Looks like adding semicolon or not adding, both are working.

function test() {
};

function test2() {}

Answer 1

In short, you don’t need to add a semi-colon.

According to an article that covers the topic of semi-colon necessity in JavaScript quite thoroughly, these are all valid examples of lines without semi-colons:

var a=1
var b=2
var c=3

// before
if(condition) stuff()

// after
if(condition){
  stuff()
}

// after minification
if(condition){stuff()}

This, on the other hand, will not work:

a = b + c
(d + e).print()