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Base Checkbox animation preview

Base Checkbox animation preview

This preview uses fictional demo content. See the props below for the customization options available in this component.

npx nativeanimation add base-checkbox

Base Checkbox

React Native Checkbox Component

A checkbox with an animated check stroke that takes its colors and radius from a configurable theme.

Native Animation Base · Free · MIT

Read and download source

Add to your project

Copy the component and its assets into your app with the Native Animation CLI, or paste the agent prompt into Claude Code, Codex or Cursor once the MCP server is connected.

About this component

A checkbox with an animated check stroke that takes its colors and radius from a configurable theme.

How it works

The box has a 4 pt radius, input border, shadow-xs.
Checking fills the box from 70% scale in 300 ms, then draws the check after 200 ms: the short leg first, then the long one (300 ms, draw curve), with a pop spring (500/24).
Unchecking erases the stroke in 300 ms and fades the fill out in 150 ms.
The check is the Lucide check path drawn with two views, so it needs no SVG dependency.

Install

npx nativeanimation add base-checkbox

The CLI also copies base-theme. Dependencies, if you copy by hand:

npx expo install react-native-gesture-handler react-native-reanimated react-native-worklets

Usage

import { BaseCheckbox } from './base-checkbox';

<BaseCheckbox value={done} onValueChange={setDone} accessibilityLabel="Draft the launch email" />

Next to a label, as a row:

<Pressable onPress={() => setDone(!done)} style={{ flexDirection: 'row', gap: 12 }}>
  <BaseCheckbox value={done} accessibilityLabel="Accept the terms" />
  <Text>Accept the terms</Text>
</Pressable>

Wrap your app in BaseThemeProvider (from base-theme) to choose light/dark and an accent; without it, pieces use the light neutral theme. Every piece also takes a theme prop that wins over the provider.

Props

Prop	Type	Default	Description
`value`	`boolean`	—	Checked (controlled).
`defaultValue`	`boolean`	`false`	Initial state (uncontrolled).
`onValueChange`	`(value: boolean) => void`	—	Called when toggled.
`disabled`	`boolean`	`false`	Dims and blocks toggling.
`accessibilityLabel`	`string`	—	What is being checked.
`theme`	`BaseTheme`	provider	Overrides the theme from `BaseThemeProvider`.
`testID`	`string`	—	Test identifier on the root view.

Compatibility

Expo SDK 58 · React Native 0.88 · Reanimated 4.7 · react-native-worklets 0.13. Runs on iOS, Android and web, in Expo Go and in development builds. Part of Native Animation Base, a free family that shares one theme: install base-theme once (the CLI does it for you) and every Base piece picks it up.

Accessibility

Announced as a checkbox with checked and disabled states, synchronized through native accessibility state and ARIA. The 16 pt box sits inside a 48 dp Android or 44 pt iOS/web target. Supports screen-reader activation and Enter/Space on web. With Reduce Motion on, the fill and check appear without animation.

Part of a shared foundation

Use it in a screen

Compose Base Checkbox with other Base components and a single shared theme. Ask your agent to read each API, then connect real navigation, state, and callbacks.

Build a habit tracker Build with an agent CLI and manual installation Theme and dark mode Accessibility checklist Native Animation Base UI library

Go further.

Base covers the everyday. Choose a more expressive interaction when your app calls for it.

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Vertical Range Window ↗

A vertical range control with independent handles and a draggable interval band, with configurable bounds, palette, and fonts.

Another way to solve this task · $9

Document Corner Capture ↗

A document review tool with draggable corners and an image loupe, with configurable image, labels, palette, and fonts.

Source code

Loading public source…

Dependencies

Package	Version
react-native-gesture-handler	~3.3.0
react-native-reanimated	4.7.1
react-native-worklets	0.13.0

Compatibility

SDK	Status	Revision	Last revision	Platforms	Dependencies
Expo SDK 58	Tested	1	10/27/2026	iOS, Web, Android	react-native-gesture-handler ~3.3.0, react-native-reanimated 4.7.1, react-native-worklets 0.13.0
Expo SDK 57	Tested	1	10/27/2026	iOS, Web, Android	react-native-gesture-handler ~2.32.0, react-native-reanimated 4.5.1, react-native-worklets 0.10.1

Scroll the table horizontally to review every column ↔

More animations

BaseCheckbox.tsx

import Animated, {
  ReduceMotion,
  useAnimatedStyle,
  useSharedValue,
  withDelay,
  withSpring,
  withTiming,
} from 'react-native-reanimated';
import {
  baseActivationProps,
  useBaseReducedMotion,
  spring,
  timing,
  useBaseTheme,
  type BaseTheme,
} from '../base-theme';
import React, { useEffect, useState } from 'react';
import { Platform, View } from 'react-native';
import { Gesture, GestureDetector } from 'react-native-gesture-handler';
import { scheduleOnRN } from 'react-native-worklets';

export type BaseCheckboxProps = {
  value?: boolean;
  defaultValue?: boolean;
  onValueChange?: (value: boolean) => void;
  disabled?: boolean;
  theme?: BaseTheme;
  testID?: string;
  accessibilityLabel?: string;
};

const BOX = 16;
// The check icon (polyline 4,12 9,17 20,6 on a 24 grid) at 14px, centered in the 16px box.
const K = 14 / 24;
const A = { x: 1 + 4 * K, y: 1 + 12 * K };
const B = { x: 1 + 9 * K, y: 1 + 17 * K };
const C = { x: 1 + 20 * K, y: 1 + 6 * K };
const STROKE = 2 * K;
const LEG1 = Math.hypot(B.x - A.x, B.y - A.y);
const LEG2 = Math.hypot(C.x - B.x, C.y - B.y);
const SPLIT = LEG1 / (LEG1 + LEG2);

export function BaseCheckbox({
  value: controlled,
  defaultValue = false,
  onValueChange,
  disabled = false,
  theme: override,
  testID,
  accessibilityLabel,
}: BaseCheckboxProps) {
  const theme = useBaseTheme(override);
  const { colors } = theme;
  const [internal, setInternal] = useState(defaultValue);
  const checked = controlled ?? internal;
  const reduced = useBaseReducedMotion();

  const fill = useSharedValue(checked ? 1 : 0);
  const draw = useSharedValue(checked ? 1 : 0);
  const pop = useSharedValue(checked ? 1 : 0);

  useEffect(() => {
    if (checked) {
      fill.set(withTiming(1, timing(theme, 'fill', reduced)));
      const delay = reduced ? 0 : (theme.motion.transitions.check.delay ?? 0);
      draw.set(
        withDelay(
          delay,
          withTiming(1, timing(theme, 'check', reduced)),
          ReduceMotion.Never,
        ),
      );
      pop.set(
        reduced
          ? 1
          : withDelay(
              delay,
              withSpring(1, spring(theme, 'checkPop')),
              ReduceMotion.Never,
            ),
      );
    } else {
      draw.set(withTiming(0, timing(theme, 'uncheck', reduced)));
      pop.set(withTiming(0, timing(theme, 'popOut', reduced)));
      fill.set(withTiming(0, timing(theme, 'popOut', reduced)));
    }
  }, [checked, reduced, theme, fill, draw, pop]);

  const toggle = () => {
    if (disabled) return;
    const next = !checked;
    if (controlled === undefined) setInternal(next);
    onValueChange?.(next);
  };
  const tap = Gesture.Tap()
    .enabled(!disabled)
    .onEnd((_event, success) => {
      if (!success) return;
      scheduleOnRN(toggle);
    });

  const fillStyle = useAnimatedStyle(() => ({
    opacity: fill.get(),
    transform: [
      {
        scale:
          theme.motion.scales.fill +
          (1 - theme.motion.scales.fill) * fill.get(),
      },
    ],
  }));
  const iconStyle = useAnimatedStyle(() => ({
    transform: [{ scale: 0.5 + 0.5 * pop.get() }],
  }));
  const leg1Style = useAnimatedStyle(() => ({
    width:
      Math.min(1, draw.get() / SPLIT) * LEG1 +
      (draw.get() > 0 ? STROKE / 2 : 0),
  }));
  const leg2Style = useAnimatedStyle(() => ({
    width:
      Math.max(0, (draw.get() - SPLIT) / (1 - SPLIT)) * LEG2 +
      (draw.get() > SPLIT ? STROKE / 2 : 0),
  }));

  const stroke = {
    position: 'absolute' as const,
    height: STROKE,
    borderRadius: STROKE,
    backgroundColor: colors.primaryForeground,
    transformOrigin: 'left center',
  };

  return (
    <GestureDetector gesture={tap}>
      <View
        testID={testID}
        accessible
        accessibilityRole="checkbox"
        accessibilityLabel={accessibilityLabel}
        accessibilityState={{ checked, disabled }}
        aria-checked={checked}
        aria-disabled={disabled}
        {
          /* RN Web forwards DOM events rather than native event objects. */
          ...(baseActivationProps(toggle, disabled) as object)
        }
        style={{
          width: Platform.OS === 'android' ? 48 : 44,
          height: Platform.OS === 'android' ? 48 : 44,
          alignItems: 'center',
          justifyContent: 'center',
        }}
      >
        <View
          style={{
            width: BOX,
            height: BOX,
            borderRadius: 4,
            borderWidth: 1,
            borderColor: checked ? colors.primary : colors.input,
            backgroundColor: colors.inputSurface,
            boxShadow: theme.shadow.xs,
            opacity: disabled ? 0.5 : 1,
          }}
        >
          <Animated.View
            style={[
              {
                position: 'absolute',
                top: -1,
                left: -1,
                width: BOX,
                height: BOX,
                borderRadius: 4,
                backgroundColor: colors.primary,
              },
              fillStyle,
            ]}
          />
          <Animated.View
            style={[
              {
                position: 'absolute',
                top: -1,
                left: -1,
                width: BOX,
                height: BOX,
              },
              iconStyle,
            ]}
          >
            <Animated.View
              style={[
                stroke,
                {
                  left: A.x,
                  top: A.y - STROKE / 2,
                  transform: [
                    { rotate: `${Math.atan2(B.y - A.y, B.x - A.x)}rad` },
                  ],
                },
                leg1Style,
              ]}
            />
            <Animated.View
              style={[
                stroke,
                {
                  left: B.x,
                  top: B.y - STROKE / 2,
                  transform: [
                    { rotate: `${Math.atan2(C.y - B.y, C.x - B.x)}rad` },
                  ],
                },
                leg2Style,
              ]}
            />
          </Animated.View>
        </View>
      </View>
    </GestureDetector>
  );
}

LICENSE

MIT License

Copyright (c) 2026 Native Animation

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

nativeanimation.manifest.json

{
  "schemaVersion": 1,
  "id": "base-checkbox",
  "family": "base",
  "license": "MIT",
  "kind": "component",
  "registryDependencies": [
    "base-theme"
  ],
  "dependencies": {
    "react-native-gesture-handler": "~3.3.0",
    "react-native-reanimated": "4.7.1",
    "react-native-worklets": "0.13.0"
  }
}