Use const declarations instead of var wherever constants are declared

[Jaifroid]

We have established with #613 that const works with all the browsers we support, and it improves readability as well as (presumably) improving browser/app memory management (likely a very tiny effect).

[yonis9]

Hi, can I take it?

[Jaifroid]

@yonis9 Yes, this would be an easy first PR. Just make sure that it is only constants that you define with const, i.e. nothing that can change values. Generally we indicate constants with capital letters. For example, you'll see three at the beginning of app.js.

[ritikkuril]

can i take this issue

[Jaifroid]

Yes you can, thanks.

[ritikkuril]

i new to this so just asking i just need to convert all var type in const type in all .js scripts

[Jaifroid]

@ritikkuril No, as is written above, only values that are actually constants should be converted.

[fabcoder547]

@ritikkuril have you done setup on your localpc? can you guide me in that ? how you did that?

[ritikkuril]

@fabcoder547 i am also new bro