javascript - Remove duplicates in array list react

Question

array name stays and it duplicates and repeating this process just clogs the list up.

Thank you.

        setListItems(contents.data);
        console.log(contents.data);

Answer 1

To convert the array contents.data to Set, do this:

const setData = new Set(contents.data);

That will remove all the duplicate items. Then to convert it back, do this:

const uniqueArray = Array.from(setData);

The above will only work if the original array (contents.data) consisted of primitive values. If it was an array of objects then this will not work as-is and will require some changes.