use-scroll-into-view

Scrolls given element into view

Source

Docs

Package

Usage

The use-scroll-into-view hook handles scroll behavior for any scrollable element. Basic usage works the same way as element.scrollIntoView(). The hook adjusts the scrolling animation with respect to the reduced-motion user preference.

Hello there

import { useScrollIntoView } from '@mantine/hooks';
import { Button, Text, Group, Box } from '@mantine/core';

function Demo() {
  const { scrollIntoView, targetRef } = useScrollIntoView<HTMLDivElement>({
    offset: 60,
  });

  return (
    <Group justify="center">
      <Button
        onClick={() =>
          scrollIntoView({
            alignment: 'center',
          })
        }
      >
        Scroll to target
      </Button>
      <Box
        style={{
          width: '100%',
          height: '50vh',
          backgroundColor: 'var(--mantine-color-blue-light)',
        }}
      />
      <Text ref={targetRef}>Hello there</Text>
    </Group>
  );
}

API

The hook is configured with a settings object:

onScrollFinish – function that will be called after the scroll animation
easing – custom math easing function
duration - duration of the scroll animation in milliseconds
axis - axis of the scroll
cancelable - indicator if the animation may be interrupted by user scrolling
offset - additional distance between the nearest edge and the element
isList - indicator that prevents content jumping in scrolling lists with multiple targets, for example Select, Carousel

The hook returns an object with:

scrollIntoView – function that starts the scroll animation
cancel – function that stops the scroll animation
targetRef - ref of the target HTML node
scrollableRef - ref of the scrollable parent HTML element; if not used, the document element will be used

The returned scrollIntoView function accepts a single optional argument alignment - optional target element alignment relative to the parent based on the current axis.

import { useScrollIntoView } from '@mantine/hooks';

const { scrollIntoView } = useScrollIntoView();

scrollIntoView({ alignment: 'center' });

Easing

The hook accept custom easing math function to control the flow of animation. It takes t argument, which is a number between 0 and 1.

Default easing is easeInOutQuad - more info here. You can find other popular examples on easings.net

import { useScrollIntoView } from '@mantine/hooks';

useScrollIntoView({
  easing: (t) => (t < 0.5 ? 16 * t ** 5 : 1 - (-2 * t + 2) ** 5 / 2), // easeInOutQuint
});

Parent node

Scroll me into view

import { useScrollIntoView } from '@mantine/hooks';
import { Button, Text, Group, Paper, Box } from '@mantine/core';

function Demo() {
  const { scrollIntoView, targetRef, scrollableRef } = useScrollIntoView<
    HTMLDivElement,
    HTMLDivElement
  >();

  return (
    <Group justify="center">
      <Paper ref={scrollableRef} h={300} style={{ overflowY: 'scroll', flex: 1 }}>
        <Box pt={260} pb={450}>
          <Paper
            ref={targetRef}
            p="xl"
            style={{
              backgroundColor: 'var(--mantine-color-blue-light)',
              width: '100%',
            }}
          >
            <Text>Scroll me into view</Text>
          </Paper>
        </Box>
      </Paper>
      <Button onClick={() => scrollIntoView()}>Scroll to target</Button>
    </Group>
  );
}

Scroll X axis

Scroll me into view

import { useScrollIntoView } from '@mantine/hooks';
import { Button, Text, Group, Paper, Box } from '@mantine/core';

function Demo() {
  const { scrollIntoView, targetRef, scrollableRef } = useScrollIntoView<
    HTMLDivElement,
    HTMLDivElement
  >({ axis: 'x' });

  return (
    <Group justify="center">
      <Paper ref={scrollableRef} h={150} w={300} style={{ overflowX: 'scroll' }}>
        <Box pl={260} pr={450}>
          <Paper
            ref={targetRef}
            p="md"
            style={{
              backgroundColor: 'var(--mantine-color-blue-light)',
              width: 'max-content',
            }}
          >
            <Text>Scroll me into view</Text>
          </Paper>
        </Box>
      </Paper>
      <Button onClick={() => scrollIntoView()}>Scroll to target</Button>
    </Group>
  );
}

Definition

interface UseScrollIntoViewAnimation {
  /** Target element alignment relatively to parent based on current axis */
  alignment?: 'start' | 'end' | 'center';
}

interface UseScrollIntoViewOptions {
  /** Callback fired after scroll */
  onScrollFinish?: () => void;

  /** Duration of scroll in milliseconds */
  duration?: number;

  /** Axis of scroll */
  axis?: 'x' | 'y';

  /** Custom mathematical easing function */
  easing?: (t: number) => number;

  /** Additional distance between nearest edge and element */
  offset?: number;

  /** Indicator if animation may be interrupted by user scrolling */
  cancelable?: boolean;

  /** Prevents content jumping in scrolling lists with multiple targets */
  isList?: boolean;
}

export interface UseScrollIntoViewReturnValue<
  Target extends HTMLElement = any,
  Parent extends HTMLElement | null = null,
> {
  scrollableRef: React.RefObject<Parent | null>;
  targetRef: React.RefObject<Target | null>;
  scrollIntoView: (params?: UseScrollIntoViewAnimation) => void;
  cancel: () => void;
}

function useScrollIntoView<
  Target extends HTMLElement = any,
  Parent extends HTMLElement | null = null
>(
  options?: UseScrollIntoViewOptions,
): UseScrollIntoViewReturnValue<Target, Parent>

Exported types

UseScrollIntoViewOptions and UseScrollIntoViewReturnValue types are exported from the @mantine/hooks package; you can import them in your application:

import type { UseScrollIntoViewOptions, UseScrollIntoViewReturnValue } from '@mantine/hooks';

use-resize-observer

use-scroll-spy