Seidu Abdul Salam的动态

State management in React, simple but sometimes frustrating process. Recently, I was talking to a friend of mine about how the useState hook works in react. When you call the setState function with a particular value, useState doesn't return the current value you just set. Instead, it returns the previous value but still changes the state to the new one. This is a funny but expected behaviour. The component state you're updating has to rerender before you can utilise the newly set state. Some are of opinion that this behaviour is because useState(and similar tools like dispatch and useReducer) are asynchronous. This is not entirely true though because if it were, a simple "async-await" should fix it. The reason is: for each component render, the state is immutable. So, a component can have only one state per render, not more. Now you may ask, what if I want to use the state I just set right away, like in my case in the code below? In my case, I have a default courseDetails state which after updating, the updated state can only be accessed after another rerender. Now it's just a matter of: " can I wait for the next rerender to use the updated state"? If you can, you just use the state in the next rerender. If not, you can use the updated values directly i.e say you're making an api call, you can use the values from the api call directly then set the state to the result of the api call to be able to access later as the new state. I hope this has been helpful?? #softwaredevelopment #softwareengineering #react #statemanagement #redux #problemsolving

useState() In React,?useState?is a built-in hook that allows you to add state to functional components. It is used to declare a state variable and a function to update that variable. The?useState?hook returns an array with two elements: the current state value and a function to update the state. Here's an example of how to use?useState?in React

I have a nested value in array and I want to update value using useState and it is updated but it a Check it out: https://lnkd.in/gZif3StA Join the conversation! #reactjs

????????????????? ???????????? ???????????????? ? In React, the state (declared using useState) is ?????????????? by React. Whenever the state changes, React ????-?????????????? the component, and the changes are instantly reflected in the websites. This automatic re-rendering capability is ?????? ?????????????????? with normal variables. If you update a normal variable, React does not reflected on websites. That's why we use useState instead of a normal variable

???????????????????????? ???????????????? ???????? ???? ?????????? 1. ?? Import useState from "react". 2. ?? Define the variable name and set-function within your useState hook. 3. ?? Specify the variable type inside the useState function. Note: ? useState should always be used inside functional components. #React #Hooks #ProgrammingTips ????

A very comprehensive video that wraps up all the mistakes made regarding the use of useState and useEffect in React

Explore efficient state management alternatives for React applications! ??

https://lnkd.in/g6tCSJS8 Optimize React Performance: Minimize Re-renders with React.memo()

The First Project Using React Library ?? This website simply save you a things related to your travel journey , allows you to enter name and count , mark what you packed , sorting using 3 ways ,and finally clear all items what you entered , also calculate stat. info of count of items