In JavaScript, the findLastIndex() method is used to find the last index of an array element that satisfies a given condition. It works similarly to findIndex(), but it starts searching from the end of the array instead of the beginning. array.findLastIndex(callback(element, index, array)); callback: A function that runs for each element in the array. element: The current element b... https://docs.vultr.com/javascript/standard-library/Array/lastIndexOf