react-icons/bs#BsChevronDoubleDown JavaScript Examples

export default function Chat() {
  const [height, setHeight] = useState(window.innerHeight - 205);
  const {
    scrollRef,
    onScroll,
    scrollToBottom,
    isOnBottom,
    unviewedMessageCount,
  } = useAppContext();
  useEffect(() => {
    window.addEventListener("resize", () => {
      setHeight(window.innerHeight - 205);
    });
  }, []);

  return (
    <Container maxW="600px" pb="20px">
      <Box
        bg="white"
        p="5"
        overflow="auto"
        borderRadius="10px"
        height={height}
        onScroll={onScroll}
        ref={scrollRef}
      >
        <Messages />
        {!isOnBottom && (
          <div
            style={{
              position: "sticky",
              bottom: 8,
              // right: 0,
              float: "right",
              cursor: "pointer",
            }}
            onClick={scrollToBottom}
          >
            {unviewedMessageCount > 0 ? (
              <Badge
                ml="1"
                fontSize="0.8em"
                colorScheme="green"
                display="flex"
                borderRadius="7px"
                padding="3px 5px"
                alignItems="center"
              >
                {unviewedMessageCount}
                <BsChevronDoubleDown style={{ marginLeft: "3px" }} />
              </Badge>
            ) : (
              <BsChevronDoubleDown style={{ marginLeft: "3px" }} />
            )}
          </div>
        )}
      </Box>
    </Container>
  );
}

ManageSelection = ({ muts, mode = 'single', addingMut, setAddingMut, removeMutation }) => {
  let content
  if (muts.length === 0) {
    content =
      <p className='text-subheading text-sm flex items-center h-10 border border-gray-200 dark:border-gray-500 rounded px-3'>
        select mutation below
      </p>
  } else if (mode === 'multi') {
    content = (
      <div className='flex xl:flex-row-reverse items-center self-center space-x-2 xl:gap-2'>
        <Popover as='div' className='relative'>
          <Popover.Button
            as={Button}
            className='inline-flex items-center justify-center px-3 h-10 whitespace-nowrap'
          >
            {muts.length} mutation{muts.length === 1 ? '' : 's'}
            <BsChevronDoubleDown className='ml-2 h-4 w-4' />
          </Popover.Button>
          <Transition
            as={React.Fragment}
            enter="transition ease-out duration-100"
            enterFrom="transform opacity-0 scale-95"
            enterTo="transform opacity-100 scale-100"
            leave="transition ease-in duration-75"
            leaveFrom="transform opacity-100 scale-100"
            leaveTo="transform opacity-0 scale-95"
          >
            <Popover.Panel
              className={`
                absolute z-20 top-full left-0 xl:left-auto xl:right-0 mt-2 origin-top-left xl:origin-top-right font-medium py-1
                bg-white rounded shadow-md ring-1 ring-black ring-opacity-5
                focus:outline-none dark:bg-gray-600 dark:text-white dark:ring-gray-500
              `}
              as='ul'
            >
              {muts.map((mut, idx) =>
                <li
                  key={mut}
                  className={classNames(
                    'py-1.5 pl-3 md:pl-4 pr-2 flex items-center hover:bg-gray-100 dark:hover:bg-gray-700',
                    { 'border-t-2 border-dotted border-gray-300 dark:border-gray-400': !addingMut && muts.length > 1 && idx === muts.length - 1 }
                  )}
                >
                  <span className='mr-3'>{mut}</span>
                  <button
                    className={`
                    text-subheading ml-auto rounded border border-transparent
                      active:primary-ring active:bg-white dark:active:bg-gray-600
                      focus:outline-none focus-visible:primary-ring
                    `}
                    title='Remove mutation'
                    onClick={() => removeMutation(idx)}
                  >
                    <BsX className='h-5 w-5' />
                  </button>
                </li>
              )}
            </Popover.Panel>
          </Transition>
        </Popover>
        <Button
          className='pl-3 pr-1.5 self-center flex items-center h-10'
          onClick={() => setAddingMut(!addingMut)}
          title={addingMut ? 'Cancel next mutation' : 'Add next mutation'}
        >
          <span className='pr-0.5'>{ addingMut ? 'cancel' : 'Add' }</span>
          { addingMut
            ? <BsX className='w-5 h-5 opacity-70' />
            : <BsPlus className='w-5 h-5' /> }
        </Button>
      </div>
    )
  } else {
    content = (
      <div className='border border-gray-200 dark:border-gray-500 rounded p-1.5'>
        <span className='px-1.5 mr-1.5'>{muts[0]}</span>
        <Button
          className='py-0.5 px-1.5 self-center'
          onClick={removeMutation}
          title='Remove mutation'
        >
          remove
        </Button>
      </div>
    )
  }

  return (
    <section
      className='flex items-center max-w-max text-sm leading-6'
    >
      <h3 className='text-subheading font-bold uppercase text-xs tracking-wider leading-6 sr-only'>
        Selected:
      </h3>
      {content}
    </section>
  )
}