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Error: A cross-origin error was thrown. React doesn't have access to the actual error object in development.

Last updated at Posted at 2021-04-21

事象

Reactのアプリケーションで以下のエラーが出ました。

Error: A cross-origin error was thrown. React doesn't have access to the actual error object in development. See https://fb.me/react-crossorigin-error for more information

スクリーンショット 2021-04-21 11.46.11.png

原因

sample.js
// localStorageに"hogehoge"はない
const hoge = localStorage.getItem("hogehoge")

対応

  • localStorageの"hogehoge"を参照する前に条件分岐を入れることで対応しました。
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