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Discover how to dynamically sort table data in React-Table even when modifying cell display values using cell props.
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How to Sort Table Data Dynamically in React-Table

When working with dynamic tables in React, maintaining predictable sorting behavior can often become challenging, especially when modifying how data is displayed without changing the underlying data structure. If you’ve been using react-table with the useSortBy hook and found yourself in a bind when displaying formatted values, you're not alone.

In this post, we'll look into a common problem faced by React developers – sorting table data based on changed cell values – and how to efficiently solve this issue without disrupting the default sorting functionality.

Background

Imagine you have a table that showcases various dataset columns. One of the columns requires formatting or combining multiple data values into a single display output. For instance, a column that originally holds plain numbers may need to display them with formatting (like commas) or as compound values (like concatenated strings).

However, the problem arises when the table sorting still relies on the original values, leading to incorrect or unexpected sorting outcomes. Let's explore how to navigate this challenge effectively.

Problem Statement

Consider the following scenario:

You have a column displaying a number, say 5510, which you want to format as 5,510 個.

This formatting allows easy readability, but it also complicates sorting behavior.

For another column, you want to combine multiple row values, such as two or three variables into one display, like var1-var2-var3. Unfortunately, the sorting of this newly formed string does not align with how the table sorts based on its default structure.

After implementing your custom display logic, you might notice that sorting still refers back to the props.value, leading to discrepancies in the expected sorting order.

Solution

To ensure that your table sorts correctly based on your custom display values, you can preprocess the data before it reaches your Table component. This means modifying the dataset by formatting the values as needed without altering the original data structure used for sorting. Here’s how you can do it:

Step 1: Format Your Data

Create a formatting function that prepares your data by adding new properties or reshaping existing ones:

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

Step 2: Utilize useMemo to Optimize Data Processing

Use the useMemo hook to ensure that your formatted data is only recalculated when the underlying data changes:

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

Step 3: Pass the Processed Data to the Table Component

Now that you have a neatly formatted dataset, you can feed this data into your table, facilitating correct sorting based on your new format.

Example Integration in Your Result Component

Here’s how to integrate everything into your existing Result component:

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

Conclusion

By following the approach outlined above, you can effectively ensure that your react-table maintains accurate sorting behavior even as you alter how data is displayed. This solution allows you to uphold the integrity of your data while enhancing user experience through better readability.

Feel free to embrace this method in your projects, and refine the formatting logic as per your specific requirements. Happy coding with React and react-table!