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@monterosa/react-native-parallax-scroll

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All notable changes to this project will be documented in this file.

* header translateY when header is fixed and `headerFixedTransformY` is too big

* issues #17, #18 - fatal error when `scrollableComponent` prop is missing

* issue #15 - scroll to top if scrollableComponent is not Animatable

* onHeaderFixed - Header interpolation when parallxHeight === headerHeight

* onHeaderFixed - A callback function that is invoked when the header will attach to the top

* headerFixedTransformY - This number indicating how much the fixed header should move upwards during the scroll. Used as the hack to change fixed header height during scroll

  "name": "@monterosa/react-native-parallax-scroll",

  "description": "Parallax scroll for React Native",

    "url": "https://github.com/monterosalondon/react-native-parallax-scroll.git"

    "start": "node node_modules/react-native/local-cli/cli.js start",

    "adb-reverse-8081": "adb reverse tcp:8081 tcp:8081",

    "adb-reverse-7007": "adb reverse tcp:7007 tcp:7007",

    "lint": "eslint -c ./.eslintrc ./src/index.js",

    "format": "prettier-eslint --write ./src/index.js ./storybook/**/*.js",

    "storybook": "storybook start -p 7007"

    "@storybook/react-native": "^3.3.13",

    "babel-preset-react-native": "4.0.0",

[![](https://img.shields.io/npm/dm/@monterosa/react-native-parallax-scroll.svg?style=flat-square)](https://www.npmjs.com/package/@monterosa/react-native-parallax-scroll)

* Can be nested within other views(FlatList, SectionList)

$ npm install @monterosa/react-native-parallax-scroll --save

YouTube - https://www.youtube.com/watch?v=zM4koduK32Y

| ![](./demo/ios-demo-1.gif) | ![](./demo/ios-demo-2.gif) |

| ![](./demo/ios-demo-4.gif) | ![](./demo/ios-demo-1.gif) | ![](./demo/ios-demo-2.gif) |

![](./demo/ios-demo-3.gif) | ![](./demo/demo-1.gif) | ![](./demo/demo-2.gif) |

import ParallaxScroll from '@monterosa/react-native-parallax-scroll';

// Inside of a component's render() method:

      renderHeader={({ animatedValue }) => <Header animatedValue={animatedValue} />}

      renderParallaxBackground={({ animatedValue }) => <Background animatedValue={animatedValue} />}

      renderParallaxForeground={({ animatedValue }) => <Foreground animatedValue={animatedValue} />}

      parallaxForegroundScrollSpeed={2.5}

Please clone the repo and run `npm run storybook` or `yarn storybook` to show examples of usages.

All of the properties of `ScrollView` are supported. Please refer to the

[`ScrollView` documentation](https://facebook.github.io/react-native/docs/scrollview.html) for more detail.

The `ParallaxScroll` component adds a few additional properties, as described below.

| ------------------------------- | ------------------------------------------ | ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

| `style`                         | `object`                                   | `{}`                                      | Component's styles                                                                                                                                                                                  |

| `scrollStyle`                   | `object`                                   | `{}`                                      | These styles will be applied to the scroll view.                                                                                                                                                    |

| `renderHeader`                  | `({ width, height, animatedValue }) => {}` | `null`                                    | This renders an optional sticky(fixed) header that will be visible to the top of the view.                                                                                                          |

| `useNativeDriver`               | `bool`                                     | `false`                                   | Enable [Native driver](https://facebook.github.io/react-native/blog/2017/02/14/using-native-driver-for-animated.html) for animated. NOTE: Works only with `Animated.ScrollView` component.          |

| `headerBackgroundColor`         | `string`                                   | `rgba(0, 0, 0, 0)`                        | The color of the unsticked(unfixed) header background. Can be empty `''` string. NOTE: Dosen't work with useNativeDriver.                                                                           |

| `contentContainerStyle`         | `object`                                   | `{}`                                      | These styles will be applied to the scroll view content container which wraps all of the child views.                                                                                               |

| `headerFixedTransformY`         | `number`                                   | `0`                                       | This number indicating how much the fixed header should move upwards during the scroll. Used as the hack to change fixed header height during scroll.                                               |

| `onChangeHeaderVisibility`      | `func`                                     | `null`                                    | A callback function that is invoked when the parallax header is hidden or shown (as the user is scrolling). Function is called with a `boolean` value to indicate whether header is visible or not. |

| `renderParallaxBackground`      | `({ width, height, animatedValue }) => {}` | `null`                                    | This renders the background of the parallax.                                                                                                                                                        |

| `renderParallaxForeground`      | `({ width, height, animatedValue }) => {}` | `null`                                    | This renders the foreground of the parallax.                                                                                                                                                        |

* Header interpolation when parallxHeight === headerHeight

I welcome contributions! Please open an issue if you have any feature ideas

or find any bugs. I also accept pull requests with open arms. I will

/* eslint-disable import/no-extraneous-dependencies */

import React, { PureComponent } from 'react';

import { View, Animated, Dimensions, ListViewDataSource } from 'react-native';

/* eslint-enable import/no-extraneous-dependencies */

export default class ParallaxScroll extends PureComponent {

    data: PropTypes.oneOfType([PropTypes.array]),

    style: PropTypes.oneOfType([PropTypes.number, PropTypes.object]),

    sections: PropTypes.oneOfType([PropTypes.array]),

    children: PropTypes.oneOfType([PropTypes.array, PropTypes.element]),

    dataSource: PropTypes.instanceOf(ListViewDataSource),

    scrollStyle: PropTypes.oneOfType([PropTypes.number, PropTypes.object]),

    scrollableComponent: PropTypes.oneOfType([PropTypes.func, PropTypes.object]),

    isBackgroundScalable: PropTypes.bool,

    headerFixedTransformY: PropTypes.number,

    headerBackgroundColor: PropTypes.string,

    contentContainerStyle: PropTypes.oneOfType([

    onChangeHeaderVisibility: PropTypes.func,

    renderParallaxBackground: PropTypes.func,

    renderParallaxForeground: PropTypes.func,

    fadeOutParallaxForeground: PropTypes.bool,

    fadeOutParallaxBackground: PropTypes.bool,

    headerFixedBackgroundColor: PropTypes.string,

    parallaxBackgroundScrollSpeed: PropTypes.number,

    parallaxForegroundScrollSpeed: PropTypes.number

    parallaxHeight: window.width * RATIO,

    scrollableComponent: Animated.ScrollView,

    headerBackgroundColor: 'rgba(0, 0, 0, 0)',

    headerFixedBackgroundColor: 'rgba(0, 0, 0, 1)',

    this.scrollableComponent = props.scrollableComponent;

		@@ -5,2 +5,8 @@ # Changelog

		### 1.5.4 - 2018-03-3

		#### Fixed

		* header translateY when header is fixed and `headerFixedTransformY` is too big

		### 1.5.3 - 2018-02-1
		@@ -7,0 +13,0 @@

		{
		"name": "@monterosa/react-native-parallax-scroll",
		"version": "1.5.3",
		"version": "1.5.4",
		"description": "Parallax scroll for React Native",
		@@ -5,0 +5,0 @@ "repository": {

		@@ -23,3 +23,3 @@ [![](https://img.shields.io/npm/dm/@monterosa/react-native-parallax-scroll.svg?style=flat-square)](https://www.npmjs.com/package/@monterosa/react-native-parallax-scroll)

		\| ![](./demo/ios-demo-1.gif) \| ![](./demo/ios-demo-2.gif) \|
		\| ![](./demo/ios-demo-4.gif) \| ![](./demo/ios-demo-1.gif) \| ![](./demo/ios-demo-2.gif) \|
		![](./demo/ios-demo-3.gif) \| ![](./demo/demo-1.gif) \| ![](./demo/demo-2.gif) \|
		@@ -93,2 +93,8 @@

		### 1.5.4 - 2018-03-3

		#### Fixed

		* header translateY when header is fixed and `headerFixedTransformY` is too big

		### 1.5.3 - 2018-02-1
		@@ -106,8 +112,2 @@

		### 1.5.1 - 2017-12-01

		#### Fixed

		* Header interpolation when parallxHeight === headerHeight

		## Contributing
		@@ -114,0 +114,0 @@

		@@ -340,3 +340,3 @@ /* eslint-disable import/no-extraneous-dependencies */
		translateY: this.scrollY.interpolate({
		inputRange: [0, parallaxHeight - height],
		inputRange: [0, headerFixedTransformY],
		outputRange: [0, -headerFixedTransformY],
		@@ -343,0 +343,0 @@ extrapolate: 'clamp'

Improved metrics