@ajna/pagination

@ajna/pagination

Table of Contents

• Version
• Installation
• Demo with all options applied
• Components
  • Pagination
  • PaginationContainer
  • PaginationPageGroup
  • PaginationPrevious
  • PaginationNext
  • PaginationPage
  • PaginationSeparator
• Hooks
  • usePagination
• Usage
  • Minimal
  • Styling
  • Disabling
  • Page size
  • Limits
  • Separator
  • Offset
  • Total
  • Full usage example

Version

Installation

npm

npm i @ajna/pagination

Yarn

yarn add @ajna/pagination

Demo with all options applied

Check it out in this Sandbox

Components

Pagination

Prop	Description	Type	Default	Required
pagesCount	The total number of pages	number		yes
currentPage	The page which is currently being selected	number		yes
onPageChange	On change handler which returns the last selected page	(currentPage: number) => void		yes
isDisabled	Denotates if all items on the pagination are disabled or not	boolean	false	no

PaginationContainer

It's a Flex component, so any FlexProps are accepted

PaginationPageGroup

It's a Stack component, so any StackProps are accepted

PaginationPrevious

It's a Button component, so any ButtonProps are accepted

PaginationNext

It's a Button component, so any ButtonProps are accepted

PaginationPage

It's a Button component, so any ButtonProps are accepted

PaginationSeparator

It's a Button component, so any ButtonProps are accepted

Hooks

usePagination

Options

Prop	Description	Type	Default	Required
initialState	Initial states for pagination values	InitialState		yes
total	The total amount of items from the endpoint you are consuming	number	undefined	no
limits	The limits cut the amount of pages to show	Limits	undefined	no
pagesCount	If the amount of pages is manually set, it will take precedence	number	undefined	no

Returned values

Prop	Description	Type	Default
offset	Offset value generated	number	0
pages	The array of pages to render	number[]	[]
pagesCount	The total amount of pages	number	0
currentPage	The page which is currently being selected	number
pageSize	The amount of items per page	number	undefined
isDisabled	Denotates if all items on the pagination are disabled or not	boolean	false
setPageSize	A setter for the isDisabled value	Dispatch<SetStateAction>
setIsDisabled	A setter for the isDisabled value	Dispatch<SetStateAction>
setCurrentPage	A setter for the currentPage value	Dispatch<SetStateAction>

Usage

Minimal

This is the bare minimum set up you need to get it up and working

import React, { FC, ChangeEvent, useEffect, useState } from "react";
import { ChakraProvider } from "@chakra-ui/react";
import {
  Pagination,
  usePagination,
  PaginationNext,
  PaginationPage,
  PaginationPrevious,
  PaginationContainer,
  PaginationPageGroup,
} from "@ajna/pagination";

const Minimal: FC = () => {
  const {
    currentPage,
    setCurrentPage,
    pagesCount,
    pages
  } = usePagination({
    pagesCount: 12,
    initialState: { currentPage: 1 },
  });

  return (
    <ChakraProvider>
      <Pagination
        pagesCount={pagesCount}
        currentPage={currentPage}
        onPageChange={setCurrentPage}
      >
        <PaginationContainer>
          <PaginationPrevious>Previous</PaginationPrevious>
          <PaginationPageGroup>
            {pages.map((page: number) => (
              <PaginationPage 
                key={`pagination_page_${page}`} 
                page={page} 
              />
            ))}
          </PaginationPageGroup>
          <PaginationNext>Next</PaginationNext>
        </PaginationContainer>
      </Pagination>
    </ChakraProvider>
  );
};

export default Demo;

Styling

The _curent prop will contain the props for the page which is currently selected All other props will apply to every other page

<PaginationPage
  w={7}
  bg="red.300"
  fontSize="sm"
  _hover={{
    bg: "green.300"
  }}
  _current={{
    w: 7,
    bg: "green.300"
    fontSize: "sm"
    _hover: {
      bg: "blue.300"
    },
  }}
>

<PaginationPrevious
  bg="blue.500"
  w="20rem"
  //...any button prop
>
  Previous
</PaginationPrevious>

<PaginationNext
  w={7}
  bg="red.300"
  fontSize="sm"
  //...any button prop
>
  Next
</PaginationNext>

<PaginationContainer
  bg="blue.500"
  w="full"
  //...any flex prop
>
  ...
</PaginationContainer>

<PaginationPageGroup
  bg="blue.500"
  w="full"
  //...any stack prop
>
  ...
</PaginationPageGroup>

Disabling

It's provided a commodity disable prop to disable/enable all your pagination components at once

const { isDisabled, setIsDisabled } = usePagination({
  initialState: { isDisabled: false }
});

const handleDisableClick = () => {
  return setIsDisabled((oldState) => !oldState);
};

<Pagination
  isDisabled={isDisabled}
>

Page size

It's provided a commodity page size setter and getter

const { pageSize, setPageSize } = usePagination({
  initialState: { pageSize: 5 },
});

const handlePageSizeChange = (event: ChangeEvent<HTMLSelectElement>) => {
  const pageSize = Number(event.target.value);

  setPageSize(pageSize);
};

Limits

You can trim the ammount of pages you show by passing both limits at the same time You need to pass them both, otherwise no limits will be applied

const { pages } = usePagination({
  limits: {
    outer: outerLimit,
    inner: innerLimit,
  },
});

Separator

Additionaly, you can customize the separator component used when limits are defined

<PaginationPageGroup separator={<PaginationSeparator _hover={{ bg: 'purple.500' }} bg='teal.500'>}>
  {pages.map((page: number) => (
    <PaginationPage key={`pagination_page_${page}`} page={page} />
  ))}
</PaginationPageGroup>

Offset

It's possible that the API for the pagination you are consuming works with an offset One it's calculated and provided for you using the pageSize and currentPage values

This is calculated with the next formula:

[currentPage * pageSize - pageSize]

currentPage === 1 && pageSize === 5 // offset = 0;
currentPage === 2 && pageSize === 5 // offset = 5;
currentPage === 3 && pageSize === 5 // offset = 10;

const { offset, pageSize } = usePagination({
  initialState: { pageSize: 5 },
});

fetchUsingOffset(pageSize, offset).then((data) => {
  // use data
});

Total

Keep in mind that if you know the total amount of items of the requested endpoint, which is not a strange thing to be returned, you can use that to generate the pages for you

const { pages, pagesCount } = usePaginator({
  total: 4021,
  initialState: { pageSize: 5 }
});

<Pagination
  pagesCount={pagesCount}
>

<PaginationPageGroup>
  {pages.map((page: number) => (
    <PaginationPage key={`pagination_page_${page}`} page={page} />
  ))}
</PaginationPageGroup>

Full usage example

In this example you can see all the possible features provided by the library being applied to show 10 pokemons names, with the ability to play with the page size and disable state

import React, { FC, ChangeEvent, useEffect, useState } from "react";
import { Grid, Center, Select, Text, Button, Stack } from "@chakra-ui/react";
import {
  Pagination,
  usePagination,
  PaginationPage,
  PaginationNext,
  PaginationPrevious,
  PaginationPageGroup,
  PaginationContainer,
  PaginationSeparator,
} from "@ajna/pagination";

const fetchPokemons = async (
  pageSize: number,
  offset: number
): Promise<any> => {
  return await fetch(
    `https://pokeapi.co/api/v2/pokemon?limit=${pageSize}&offset=${offset}`
  ).then(async (res) => await res.json());
};

const Full: FC = () => {
  // states
  const [pokemonsTotal, setPokemonsTotal] = useState<number | undefined>(
    undefined
  );
  const [pokemons, setPokemons] = useState<any[]>([]);

  // constants
  const outerLimit = 2;
  const innerLimit = 2;

  // pagination hook
  const {
    pages,
    pagesCount,
    offset,
    currentPage,
    setCurrentPage,
    setIsDisabled,
    isDisabled,
    pageSize,
    setPageSize,
  } = usePagination({
    total: pokemonsTotal,
    limits: {
      outer: outerLimit,
      inner: innerLimit,
    },
    initialState: {
      pageSize: 5,
      isDisabled: false,
      currentPage: 1,
    },
  });

  // effects
  useEffect(() => {
    fetchPokemons(pageSize, offset)
      .then((pokemons) => {
        setPokemonsTotal(pokemons.count);
        setPokemons(pokemons.results);
      })
      .catch((error) => console.error("App =>", error));
  }, [currentPage, pageSize, offset]);

  // handlers
  const handlePageChange = (nextPage: number): void => {
    // -> request new data using the page number
    setCurrentPage(nextPage);
    console.log("request new data with ->", nextPage);
  };

  const handlePageSizeChange = (
    event: ChangeEvent<HTMLSelectElement>
  ): void => {
    const pageSize = Number(event.target.value);

    setPageSize(pageSize);
  };

  const handleDisableClick = (): void => {
    setIsDisabled((oldState) => !oldState);
  };

  return (
    <Stack>
      <Pagination
        pagesCount={pagesCount}
        currentPage={currentPage}
        isDisabled={isDisabled}
        onPageChange={handlePageChange}
      >
        <PaginationContainer
          align="center"
          justify="space-between"
          p={4}
          w="full"
        >
          <PaginationPrevious
            _hover={{
              bg: "yellow.400",
            }}
            bg="yellow.300"
            isDisabled
            onClick={() => console.warn("I'm clicking the previous")}
          >
            <Text>Previous</Text>
          </PaginationPrevious>
          <PaginationPageGroup
            isInline
            align="center"
            separator={
              <PaginationSeparator
                isDisabled
                onClick={() => console.warn("I'm clicking the separator")}
                bg="blue.300"
                fontSize="sm"
                w={7}
                jumpSize={11}
              />
            }
          >
            {pages.map((page: number) => (
              <PaginationPage
                w={7}
                bg="red.300"
                key={`pagination_page_${page}`}
                page={page}
                onClick={() => console.warn("Im clicking the page")}
                fontSize="sm"
                _hover={{
                  bg: "green.300",
                }}
                _current={{
                  bg: "green.300",
                  fontSize: "sm",
                  w: 7,
                }}
              />
            ))}
          </PaginationPageGroup>
          <PaginationNext
            _hover={{
              bg: "yellow.400",
            }}
            bg="yellow.300"
            onClick={() => console.warn("I'm clicking the next")}
          >
            <Text>Next</Text>
          </PaginationNext>
        </PaginationContainer>
      </Pagination>
      <Center w="full">
        <Button
          _hover={{
            bg: "purple.400",
          }}
          bg="purple.300"
          onClick={handleDisableClick}
        >
          Disable ON / OFF
        </Button>
        <Select ml={3} onChange={handlePageSizeChange} w={40}>
          <option value="10">10</option>
          <option value="25">25</option>
          <option value="50">50</option>
        </Select>
      </Center>
      <Grid
        gap={3}
        mt={20}
        px={20}
        templateColumns="repeat(5, 1fr)"
        templateRows="repeat(2, 1fr)"
      >
        {pokemons?.map(({ name }) => (
          <Center key={name} bg="green.100" p={4}>
            <Text>{name}</Text>
          </Center>
        ))}
      </Grid>
    </Stack>
  );
};

export default Full;