Concepts

The story will be used for mentioning all interesting, one liner, and important concepts.

Speedup cpp:

static int speedup = [](){
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(0);
    return 0;
}();

The above is not for speed up particularly but it still works.

Browser with file system:
1. Browsers can access you file system while helps all kind of uploader.
2. It also work as file readers like pdf, image, text, word.
3. Browser is a HTML editor with inbuilt capability to understand css and js.
4. localhost — default location is /var/www/index.html (if not configured using apache, nginx, etc)
5. ~ — user folder, / — root folder

AntD CSS Styles
1. It uses different css classes for production and development environment.

URL
1. Generally following url are different in a website:
www.abc.com
https://www.abc.com
www.abc.com/
https://www.abc.com/
abc.com
abc.com/
http://www.abc.com
http://abc.com
http://abc.com/
http://www.abc.com/
https://abc.com/
https://abc.com

But this rules are added in the cloud platform such that they rewrite to 1 common url (https://www.abc.com) as it is a good practice.