[Solved] The useState set method not reflecting a change immediately

Hello Guys, As React developers Manytimes Our useState Set method is Not Reflecting Changes Immidetiely So we are going to discuss The useState set method not reflecting a change immediately And What Are the Possible Solutions to solve this. So let’s Start This article without wasting your time.

When The useState set method is not reflecting a change immediately?

I am Using useState for my Post const. setPosts will set all Post That Came from the API. But Unfortunately, The useState set method is not reflecting a change immediately.

Here is My Code.

const [posts, setPosts] = useState([]);

useEffect(() => {

    const myData = await axios({
      method: "post",
      url: "my_api_call",

    });
    setPosts(myData.data);

}, []);

How To Solve The useState set method is not reflecting a change immediately?

Solution 1: use the useEffect hook

You need to use the useEffect hook Just like we are using componentDidUpdate. It will Update your posts as they happen. Just like below code.

useEffect(() => {
    // setPosts Here
}, [posts]);

Now, Your problem will be solved. Thank You.

Solution 2: Use a Temp Variable

IF you’re not able to assign value Directly then Use a temporary Variable with await. maybe Your API can Take time so Await for that time and then set the value. Just like the below code.

const [posts, setPosts] = useState([]);

useEffect(() => {

    const myData = await axios({
      method: "post",
      url: "my_api_call",

    });
    const newPosts = await myData.data; // Temp Variable with await
    setPosts(newPosts);

}, []);

Now, Your error Should be Fixed. Thank you.

Solution 3: Merge Response

If You want to merge your response with previous data then you must use the callback syntax of state updation along with the correct use of spread syntax like

setPosts(prevPostsData=> ([...prevPostsData, ...newPostsData]));

Solution 4: try React.useRef()

You can Also Try React.useRef() instead of useEffect(). Here React.useRef() is Usefull for instant change in the React hook. Here is My Example.

const posts = React.useRef(null);

useEffect(() => {
   posts.current='values';
   console.log(posts.current)
}, [])

This is How you can Use React.useRef() and now Your error should be solved.

Conclusion

It’s all About this error. I hope We Have solved Your error. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you?

Also, Read

• The above error occurred in the component
• Argument type ‘unknown’ is not assignable parameter of type
• Cannot invoke an object which is possibly ‘undefined’
• Invariant Violation: Too many re-renders. React limits the number of renders to prevent an infinite loop
• Failed to load config “react-app” to extend from