What causes a Next.js App to crash when a prop is not defined in destructuring code?

Let me share the issue I am facing. I have developed a custom Context API wrapper to handle all my data. However, there is this docType property that may not always be defined or may not exist at times.

When I destructure it in this way:

const { docType } children?.props?.data; // My Next App / JS crashes and getting the undefined error.

This approach seems to work fine:

const docType = children.props.data?.docType;

I'm wondering why this discrepancy exists. If I don't follow this specific structuring for my code, other data props fail to destructure properly. Here's how I've set up my context with React:

import { createContext, useContext } from "react";

const AppContext = createContext();

export const AppWrapper = ({ children }) => {
  const docType = children.props.data?.docType;
  const site = children.props.data?.site;
  const page = children.props.data?.page;
  const preview = children.props?.preview;

  const sharedState = {
    docType,
    preview,
    page,
    site,
  };

  return (
    <AppContext.Provider value={sharedState}>{children}</AppContext.Provider>
  );
};

export const useAppContext = () => useContext(AppContext);

If anyone could shed some light on why I encounter this issue, it would be greatly appreciated.

Answer №1

This method can be utilized in the following manner:

const { typeOfDocument, website, webpage, website} = children?.props?.data || {}

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