@freakycoder/animated-tabbar/lib/module/AnimatedTabBarView.js

A 60FPS animated tab bar with a variety of cool animation presets.

function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
import React, { useMemo, useEffect, useRef } from 'react';
import Animated, { useSharedValue, useAnimatedReaction, runOnJS } from 'react-native-reanimated';
import Presets from './presets';
/**
 * @DEV
 * this is needed for react-native-svg to animate on the native thread.
 * @external (https://github.com/software-mansion/react-native-reanimated/issues/537)
 */
Animated.addWhitelistedUIProps({
  width: true,
  stroke: true,
  backgroundColor: true
});
export function AnimatedTabBarView(props) {
  // props
  const {
    index: controlledIndex,
    onIndexChange,
    onLongPress,
    tabs: _tabs,
    preset = 'flashy',
    style,
    itemInnerSpace,
    itemOuterSpace,
    itemContainerWidth,
    iconSize,
    duration,
    easing,
    isRTL,
    ...rest
  } = props;

  // verify props
  if (!Object.keys(Presets).includes(preset)) {
    throw new Error(`Wrong preset been provided. expected one of these: [${Object.keys(Presets).join(', ')}], but found "${preset}".`);
  }

  // variables
  const selectedIndex = useSharedValue(controlledIndex);
  const tabs = useMemo(() => {
    return Object.keys(_tabs).map(key => {
      return _tabs[key].title && _tabs[key].key ? _tabs[key] : {
        title: key,
        key: `tab-${key}`,
        ..._tabs[key]
      };
    });
  }, [_tabs]);

  //#region Effects
  const indexRef = useRef(controlledIndex);
  useEffect(() => {
    selectedIndex.value = controlledIndex;
  }, [controlledIndex]);
  useAnimatedReaction(() => selectedIndex.value, (current, previous) => {
    if (current !== previous) {
      runOnJS(onIndexChange)(current);
    }
  }, [onIndexChange]);
  //#endregion

  const PresetComponent = Presets[preset].component;

  // render
  return /*#__PURE__*/React.createElement(PresetComponent, _extends({
    style: style,
    selectedIndex: selectedIndex,
    tabs: tabs,
    itemInnerSpace: itemInnerSpace,
    itemOuterSpace: itemOuterSpace,
    itemContainerWidth: itemContainerWidth,
    iconSize: iconSize,
    duration: duration,
    easing: easing,
    isRTL: isRTL,
    onLongPress: onLongPress
  }, rest));
}
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