@workday/canvas-kit-react/dist/es6/pagination/lib/Pagination/buildPageRange.js

The parent module that contains all Workday Canvas Kit React components

const buildRange = (max, min) => {
    // `max` determines the size of the range, and `min + index` determines its values
    return [...Array(max)].map((_, index) => min + index);
};
export const buildPageRange = ({ currentPage, lastPage, rangeSize }) => {
    // prevent the range size exceeding the number of pages
    const adjustedRangeSize = lastPage < rangeSize ? lastPage : rangeSize;
    // Prevent the range from going below 1
    if (currentPage <= Math.floor(rangeSize / 2)) {
        const rangeMin = 1;
        return buildRange(adjustedRangeSize, rangeMin);
    }
    // Prevent the range from going above the lastPage
    if (currentPage + Math.floor(adjustedRangeSize / 2) > lastPage) {
        const rangeMin = lastPage - adjustedRangeSize + 1;
        return buildRange(adjustedRangeSize, rangeMin);
    }
    const rangeMin = currentPage - Math.floor(adjustedRangeSize / 2);
    return buildRange(adjustedRangeSize, rangeMin);
};