A. JavaScript Object Notation Basic Functions

1. JSON.parse() - Use to convert strings into JSON Objects.

const users = '{"name": "aryan", "age": 21, "height": 6.3}'
const users_parse = JSON.parse(users)

1. JSON.stringify() - Used to convert JSON Object to string.

const user2 = {
    name   : "ARYAN",
    gender : "MALE",
}
console.log(user2)

const user2string = JSON.stringify(user2)
console.log(user2string)

B. What is HTTP Server?

• Hyper text transfer protocol.
• Used by machines to communicate to each other.
• Also used by the frontend to talk to the backend.
• The s in HTTPS means secure.
• Protocol - http / https
• Address - (URL, IP, Port) : chat.openai.com
• Route - /backend-api/conversations
• Headers - Key & Value pairs automatically sent by browser or client. Used for Auth, etc.
• Body - Contains the data sent by the user.
• Query - Filters and parameters in the URL, placed after the ?.

C. Firing a Request!

• Browser parses the URL.
• It then does a DNS lookup → when we go to www.google.com, we are indirectly looking for a DNS.