# What is state?

state basically ek object hota hai. jaise hum varible main data ko store karte hai. usi tarah state ka use bhi data ko store karne ke liye hota hai.

# use of state

component ko update karne ke liye state ka use karte hai.

Q. state public hai ya private hai?
Q. ek component ki state ko state ke bahar use kar paoga?

# what is React?

https://www.youtube.com/watch?v=9Tz2tY-ZEwQ&list=PL8p2I9GklV47BCAjiCtuV_liN9IwAl8pM&index=1

# import is react functionality or javascript?

it is javascript functionality.

# ek component ke ander dusre component ko use kar sakte hai?

ha kar sakte hai per usse component ko hum usi component main use kar sakte hai usse bahar nahi use kar sakte.

# hum React or angular ko ek sath use kar sakte hai?

Ha hum react or angular ko ek sath use kar sakte hai kyonki react ek library hai to usse hum vue or other jagah use kar sakte hai.

# Jsx ko bina React ke use kar sakte hai?

Ha kar sakte hai.

# function and Event

https://www.youtube.com/watch?v=tmt7lf2nCBY&list=PL8p2I9GklV47BCAjiCtuV_liN9IwAl8pM&index=11

# variable update kyon nahi hota hai?

jaise hi hum variable ko update karwate hai hamara component rerender nahi hota hai. wo freeze hi rehta hai uske liye hame state use karni padhti hai.

# state public hai ya private?

state public hoti hai.

# ek component ki state ko state se bahar use kar sakta hu?

nahi kar sakte.

# React ke class component main useState ka use kar sakte hai?

Nahi kar sakte

# shouldComponentUpdate pehele run hota hai ya componentDidUpdate? which one is run first?

shouldComponentUpdate run first.

# render pehele run hota hai ya componentDidMount? which one is run first?
render

# why use componentDidMount?
for api call use componentDidMount.

# difference b/w componentDidMount or componentDidUpdate?

componentDidMount jab call hota hai jab hamar html css sab load ho chuki hoti hai or componenet tab call hota hai jab koi state update hoti hai.

# kya hame render ke ander state ko update karana chahiye?
Nahi
# kya hum componentDidMount ke under state ko update kara sakte hai?

# kya hum function ke ander useEffect ka use kar sakte hai?
# kya hum useEffect ke ander function bana sakte hai?

# useEffect state ke change hone per chalta hai ki nahi?
chalta hai. jitni baar state change hogi useEfeect utni baar call hoga.

# useEffect ek page main ek se jayeda baar use kar sakte hai?
ha kar sakte hai.