React App

useState 1: two setCount's

count2:20 count:0

useState 2: one setCount for object of three counts

invariable:20 invariable2:20 count:0

UseState 3: two indepence setCount's

count2:20 count:0

useState 4: form

email password

useState 5: useForm custom Hook

UseEffect1 form notification while rendering

email passwordtel

present change in 'email': present change in 'password'

useEffect2 unmount rendering notification

Hello

useef2liliya 052 371 83 90 elionora 054 495 61 92 daniel 052 372 9187

Hello

useef2liliya 052 371 83 90 elionora 054 495 61 92 daniel 052 372 9187

useEffect3 unmount rendering notification

Hello

useef3mount_unmountliliya 052 371 83 90 elionora 054 495 61 92 daniel 052 372 9187

useEffect4 cleaning old values.email & rendering notification

useEffect5 events shows mouse's screenX screenY

screenX screenY

useEffect6 rerendering API within custom Hook

useEffect7 saveState catched API within custom Hook

count:

useRef1 storing reference to a Component

Hello1

useRef2 storing reference to a Component plus useFetch

Hello2

count2:

UseRef3 count renderings (with createRoot it is *2)

count:

Helloref3 count of renderings

renders:1

useRef4: fetch after Timeout while Hello was unmounting (not working and not nessesary)

Hellouseref4 setState after unmounting

count:

useRef5 click on referenced button make focus to one Input and send text to another

useLayout1measures

UseLayout2width

data: loading...

"data's div measures: 19x119"

trainingcount: 1

no rendering cause of being setCount within useCallback

UseCallbackMap mapping array without rerendering

UseCallbackHello changes count by 5

Square class changes count

useMemo avoid unnecesary computing

count 0

1 time longest Word was written without computing: ""

useReducer listening to an action that will be dispatch

useReducer1: basic use instead of redux: add todo to the list

useReducer: use instead of redux: line-through todo if completed

useReducer3 instead redux if there is only one place to dispatch

number of todos: 0

UseContext with BrowserRouter

UseConext with changelable value

UseContext3 with data from login file

useContext last changes