react_notes.md

React Notes

notes on react framework

States

Why do we use states? States are used to store encapsulated data.

useEffect

• It's one of the lifecycle method on JavaScript.
• We use it to fetch data, store something as array etc.
• For making any request useEffect is being used and after making request we can store something as array.

useEffect(() => {
  // effect geoes here or request code.
}, [array]); // here inside [] we store our things.

// So whenever we make a request we need to make sure the request goes once.
// on the 2nd aurgument the [] creates epmty set of arrays to store something.
// the 2nd aurgument ensures that the useEffect should run once.