What Causes TypeError51 in Venia PWA and How to Debug It?

by Wasalu Duckworth

If you encounter the error message 'Sorry! An unexpected error occurred. Debug: TypeError51 at /RootCmp_PRODUCT__default.1b66b4c414dc44018e9b.js:312:62' while working on Magento 2.4.5 PWA with React on the product detail page (PDP), don't panic. This issue can be resolved with the right debugging approach.

Understanding the Error

The 'TypeError51' error in the Venia PWA PDP page signifies that a type mismatch has occurred at a specific location in the JavaScript bundle.

The error message includes the file path and line number, which can be extremely helpful in identifying the root cause of the issue.

Locating the Source of the Error

To start debugging, navigate to the file mentioned in the error message

'/RootCmp_PRODUCT__default.1b66b4c414dc44018e9b.js', and proceed to line 312, character 62. It's crucial to carefully review the code at this location to understand the context in which the type error is occurring.

Examining the Code

Once at the specified location, it's essential to inspect the surrounding code to identify potential type-related issues.

Look for variable assignments, function calls, or type conversions that could be leading to the type error.

Additionally, consider any recent code changes that might have introduced this issue.

Utilizing Debugging Tools

In a React PWA project, utilizing browser developer tools can aid in diagnosing type errors.

Utilize breakpoints, console logging, and runtime inspection to track the flow of data and identify the point at which the type mismatch occurs.

Addressing the Type Mismatch

Upon pinpointing the source of the type error, proceed to rectify the issue.

This could involve adjusting variable types, refining function parameters, or validating data to ensure type consistency.

Verifying the Resolution

After implementing changes, thoroughly test the PDP page to confirm that the 'TypeError51' error no longer occurs.

Performing end-to-end testing and considering diverse use cases is essential to ensure that the issue has been successfully resolved.