javascript - React query infinite scroll pageParams is undefined - Stack Overflow

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I am trying to get data Using useInfiniteQuery, but on my console, I am getting the data but the pageParams is showing undefined, am I missing something to get the pageParams?

Here is my query hook

const useActivityFeedData = () => {
  const {data} = useInfiniteQuery(
    ACTIVITY_FEED,
    ({pageParam}) => Api.user.getActivityFeedData(pageParam),
    {
      getNextPageParam: (lastPage: any) => lastPage?.meta,
    },
  );
console.log(data)
};

My API

  getActivityFeedData: (pageParam: number) => {
    console.log(pageParam, 'pageParam'); // undefined

    return api.get(
      `/rest/s1/eyon/viewer/channel/activity-feed?pageSize=10&pageIndex=0`,
      {},
      {},
    );
  },

I am trying to get data Using useInfiniteQuery, but on my console, I am getting the data but the pageParams is showing undefined, am I missing something to get the pageParams?

Here is my query hook

const useActivityFeedData = () => {
  const {data} = useInfiniteQuery(
    ACTIVITY_FEED,
    ({pageParam}) => Api.user.getActivityFeedData(pageParam),
    {
      getNextPageParam: (lastPage: any) => lastPage?.meta,
    },
  );
console.log(data)
};

My API

  getActivityFeedData: (pageParam: number) => {
    console.log(pageParam, 'pageParam'); // undefined

    return api.get(
      `/rest/s1/eyon/viewer/channel/activity-feed?pageSize=10&pageIndex=0`,
      {},
      {},
    );
  },

• javascript
• reactjs
• react-hooks
• react-query

Share Improve this question Follow asked Jun 15, 2022 at 14:28 JerinJerin 73633 gold badges1616 silver badges3939 bronze badges

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1 Answer 1

Sorted by: Reset to default 5

You're not missing anything - this is the intended behaviour. pageParams is always calculated for the next page, usually from the previous result. That's what you do in getNextPageParams.

For the first page, there is no "previous result", because it is the first page. That's why the pageParams are undefined. Note how we use default values during destructuring in the examples, e.g.:

const queryResult = useInfiniteQuery(
  ['projects'],
  ({ pageParam = 0 }) => axios.get('/api/projects?cursor=' + pageParam),
  {
    getNextPageParam: (lastPage, pages) => lastPage.nextCursor,
  }
)

for the first page, the cursor will be set to 0, as pageParam is undefined.

So it's just up to you to convert undefined to something that represents "the first page" for your api call.

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