There are a few ways to handle validation issues in MERN:

• Use a validation library: There are a number of validation libraries available for MERN. These libraries can help to simplify the process of validating data and prevent common errors.
• Write your own validation logic: If you are comfortable with writing code, you can write your own validation logic. This can be helpful if you need to validate data in a specific way.
• Use a combination of validation libraries and your own validation logic: This is a good option if you want to use the strengths of both approaches.

No matter which approach you choose, it is important to handle validation issues gracefully. This means that you should display an error message to the user and allow them to try again.

Here are some additional tips for handling validation issues in MERN:

• Use a centralized validation library: This can help to ensure that all of your validation logic is consistent.
• Use a validation library that supports different data types: This can help you to validate a wider range of data.
• Write clear and concise error messages: This can help users to understand what went wrong and how to fix it.
• Allow users to try again: This can help users to avoid getting frustrated if they make a mistake.