Array paginate interval JS

getPaginateInterval.js

function getInterval(totalItens = 100, perPage = 10, maxShowingNumbers = 5, currentPage = 1) {
		
    let lastPage = Math.ceil(totalItens / perPage)
    
    if (totalItens < 0 ) {
        console.error(`Total of itens cant be less or equal than 0`)
        return;
    } else if (lastPage > 0 && currentPage > lastPage) {
        console.error(`Current page [${currentPage}] cant be bigger than last page [${lastPage}]`)
        return;
    }
    
    function getRange(start, end, step = 1) {
        let len = Math.floor((end - start) / step) + 1
        return Array(len).fill().map((_, idx) => start + (idx * step))
    }
    
    let interval = lastPage > 0 
    ? getRange(
        Math.max(1, Math.min(lastPage - maxShowingNumbers + 1, currentPage)),
        Math.min(lastPage, Math.min(maxShowingNumbers, lastPage) - 1 + currentPage)
    )
    : []

    console.log(interval)
}

-> Outputs

getInterval(100, 10, 5, 1) -> (5) [1, 2, 3, 4, 5]

getInterval(559, 20, 3, 28) -> (3) [26, 27, 28]

getInterval(200, 15, 5, 17) -> Current page [17] cant be bigger than last page [14]

getInterval(1, 10, 5, 1) -> [1]

getInterval(1000, 10, 5, 100) -> (5) [96, 97, 98, 99, 100]

getInterval(0, 10, 5, 10) -> []

getInterval(-1 , 10, 5, 10) -> total itens cant be less than 0