How to Fix TypeError: reviews.slice is Not a Function in React Pagination Code

Discover the solution to the common TypeError issue in React Pagination and ensure your JavaScript code runs smoothly.
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What Causes This Error?

This error surfaces when the reviews variable, on which the slice() method is being called, is not an array. The method slice() is designed to work on arrays, so if the reviews isn't properly initialized as an array, JavaScript throws a type error.

Some possible reasons why this might happen include:

Improper Data Initialization: The reviews might be initialized as a different data type, such as an object or a number, instead of an array.

Incorrect API Response: If you're fetching data from an API and directly using the response, ensure the response is in an expected array format.

Variable Re-assignment: Somewhere in the code, reviews might have been unintentionally re-assigned a non-array value.

How to Troubleshoot

Check Initialization

Start by making sure that reviews is initialized as an array. For example:

[[See Video to Reveal this Text or Code Snippet]]

This initializes reviews as an empty array, ensuring that the slice() method can be used on it.

Validate API Response

When the reviews array is populated via an API call, make sure the data is in the correct format:

[[See Video to Reveal this Text or Code Snippet]]

The above snippet ensures that the data fetched is confirmed to be an array before setting it to reviews.

Review Code for Re-Assignments

Check through your codebase to ensure there are no accidental reassignments:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion