reactjs - 是什么导致了 notistack 的这个排队 snackbar 错误？

Question

我正在尝试使用 notistack 库中的 useSnack Hook ，但我不断收到此错误

TypeError: Cannot destructure property 'enqueueSnackbar' of 'Object(...)(...)' as it is undefined.

这是代码:

import React, { useContext, useEffect } from "react";
import AlertContext from "../context/alert/alertContext";
import { SnackbarProvider, useSnackbar } from "notistack";

const Alerts = (props) => {
  const alertContext = useContext(AlertContext);
  // This line below is where the error seems to be
  const { enqueueSnackbar } = useSnackbar();
  useEffect(() => {
    alertContext.msg !== "" &&
      enqueueSnackbar(alertContext.msg, {
        variant: alertContext.type,
      });
  }, [alertContext]);
  return <SnackbarProvider maxSnack={4}>{props.children}</SnackbarProvider>;
};

export default Alerts;

Answer 1

useSnackbar Hook 可从 SnackbarProvider 到树下的任何地方.
所以你不能在与 SnackbarProvier 相同的组件中使用它。 .

import AlertContext from "../context/alert/alertContext";
import { SnackbarProvider } from "notistack";

const Alerts = (props) => {
  const alertContext = useContext(AlertContext);
  const providerRef = React.useRef();

  useEffect(() => {
    alertContext.msg !== "" &&
      providerRef.current.enqueueSnackbar(alertContext.msg, {
        variant: alertContext.type,
      });
  }, [alertContext]);
  return <SnackbarProvider ref={providerRef} maxSnack={4}>
       {props.children}
       </SnackbarProvider>;
};

export default Alerts;