Coding⏱️ 3 min read📅 2026-06-04

How to Fix: Parsing error: DeprecationError: 'originalKeywordKind' has been deprecated since v5.0.0 and can no longer be used

React project parsing error due to deprecated code.

Quick Answer: Update the affected files by replacing 'originalKeywordKind' with 'identifierToKeywordKind(identifier)'.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🛠️ Step-by-Step Verified Fixes
  3. 🎯 Final Words

The error 'Parsing error: DeprecationError: 'originalKeywordKind' has been deprecated since v5.0.0 and can no longer be used' occurs when using older versions of React in a project that is being upgraded to a newer version.

This error can be frustrating for developers, especially if they are not aware of the deprecation notice. However, by following these steps, you should be able to diagnose and remove the error.

⚠️ Common Causes

  • The primary reason for this error is that the 'originalKeywordKind' function has been replaced with a new function called 'identifierToKeywordKind(identifier)' in React version 5.0.0.
  • This change was made to improve the performance and maintainability of the React library, but it may cause issues for developers who are not aware of the deprecation notice.

🛠️ Step-by-Step Verified Fixes

Update React Version

  1. Step 1: Open your project's package.json file and update the version of react to a compatible version (e.g. 'react@17.x.x').
  2. Step 2: Run npm install or yarn upgrade to update the dependencies in your project.
  3. Step 3: Verify that the error has been resolved by checking the console output for any remaining errors.

Update Code to Use New Function

  1. Step 1: Search for occurrences of 'originalKeywordKind' in your code and replace it with 'identifierToKeywordKind(identifier)'.
  2. Step 2: Use a code editor's find-and-replace feature or a code refactoring tool to automate the process.
  3. Step 3: Test your code to ensure that it is working correctly after making the changes.

🎯 Final Words

By following these steps, you should be able to diagnose and remove the 'Parsing error: DeprecationError: 'originalKeywordKind' has been deprecated since v5.0.0 and can no longer be used' error in your React project. Remember to update your React version and make any necessary code changes to ensure a smooth upgrade process.

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