Sort Data Before Displaying in React JS | Records Sorting in React JS

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How can we sort records in react js before displaying them? We need it because even if records are sorted from the beginning, these may not remain sorted when data is deleted and new data is inserted in records. Sort Array of Objects in React Before Render. We will use useState hook to store records in state.

So import useState from react.
Take data (array with objects) in state with ids.
I have intentionally used a and b as ids in records to just show you that this method works also in the case when ids are not only numbers.

We will display records by using map method.
As we can see that records are sorted when ids are already sorted in state.
What if we change order of records?
Consider if records are not sorted in state or data set.
We can sort these records before displaying them using sort method.
So sort object before mapping over it.
Use sort() function with a custom comparator definition.

The sort() method accepts an optional argument which is a function that compares two elements of the array. The compare function of the sort() method accepts two arguments and returns a value that determines the sort order. Based on this technique, we can use sort method along with ternary operator in react js to sort data. We will compare ids against each other to sort data. Now records are perfectly sorted even records with ids a and b are also sorted. So this is how we can use sort method with custom comparator to sort data in react js by using sort method before map method.

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