Where to use semicolons in JS?

Question

While writing in JS frequently we have to use ; . Please can anyone say where to use or not to use ; .

Answer 1

It is a good practice to use semi-colon.

The only situation you shouldn't use semi-colon is when you are chaining response callback of promise.

from Morpheus :

Maz I m glad you asked, I was waiting for this question :-)

Actually if we write codes correctly then we dont need to use semicolons, but mistakes happen and the problem is ASI will cover your mistake without even throwing an error,

thats y linters like JShint, JSlint throw warning on missing semicolons on those bad scenarios. and in general its a good habit to include them,

regarding those statements here are the 3 articles

quick: https://news.codecademy.com/your-guide-to-semicolons-in-javascript/

in depth : http://www.bradoncode.com/blog/2015/08/26/javascript-semi-colon-insertion/

official: http://www.ecma-international.org/ecma-262/6.0/index.html#sec-automatic-semicolon-insertion (see chapter 11.9)

source:
https://www.sololearn.com/post/36048/?ref=app
https://code.sololearn.com/Wyr76080kKxS/?ref=app

Answer 2

The JavaScript parser will automatically add a semicolon when, during the parsing of the source code, it finds these particular situations:

1.when the next line starts with code that breaks the current one (code can spawn on multiple lines)

2.when the next line starts with a }, closing the current block

3.when the end of the source code file is reached

4.when there is a return statement on its own line

5.when there is a break statement on its own line

6.when there is a throw statement on its own line

7.when there is a continue statement on its own line