React-bling NPM

react-bling :gem:

`npm i react-bling`

A simple library that brings together react-animations, styled-components and react-waypoint to give you out-of-the-box animations for your React project.

Overview

First, you install the react-bling library.

npm i react-bling or yarn install react-bling

Next, you import the default Bling component along with the animations that you want to use from the react-bling library.

import Bling, { fadeIn, tada} from 'react-bling';

Finally, you wrap some React component(s) or element(s) in a Bling component and pass it animations and display information via props.

Animations can either applied one of two ways:

On the initial render via the animate prop
When the Bling component enters or exits the viewport via the waypoint prop.

This library exposes the animations and merge function provided by react-animations along with the ability to chain these animations.

I created the following website, which lets you sample all of the animations provided provided by react-animations: https://rad.surge.sh

Basic Usage

Here is the most basic example using the animate prop and fadeIn animation only:

import React from 'react';
import Bling, { fadeIn } from 'react-bling';

const App = () => (
  <Bling animate={{ animation: fadeIn }}>
    <p>Go react-bling!</p>
  </Bling>
);
export default App;

Props

react-bling accepts the following props: el, animate, waypoint

`el`

type: string

default: 'div'

The el prop is used to define the html element type used as the Bling wrapper component. You can use any element within the limitations of the language. For instance, you cannot use el='p' and also render a p tag as a child.

Example:

<Bling el="div" ... />

Note- The animate and waypoint props cannot be used together.

`animate`

type: object or array

The animate prop is used to set animation(s) when the Bling wrapper component first renders. You can either provide a single animation object or multiple animation objects in an array. If an array is provided, the animations will be applied in the same order as the array.

A single animation

import React from 'react';
import Bling, { fadeIn } from 'react-bling';

const App = () => (
  <Bling
    animate={{
      animation: fadeIn,
      duration: 3,
      delay: 2,
      iterate: 2,
    }}
    render={<p>Go react-bling!</p>}
  />
);

export default App;

An array of animations

const App = () => (
  <Bling
    animate={[
      {
        animation: fadeIn,
        duration: 3,
      },
      {
        animation: tada,
        duration: 2,
        iterate: 2,
      },
      {
        animation: fadeOut,
        duration: 4,
      },
    ]}
    render={<p>Go react-bling!</p>}
  />
);

export default App;

Properties:

animation

type: object (required)

You can pass any animation that you import from react-bling. You can also use react-animations' merge function to make your own unique animations. animation: merge(fadeIn, tada)

duration

type: number default: 2

This property accepts a number representing the duration of the animation in seconds.

delay

type: number default: 0

This property accepts a number representing the delay of the animation in seconds.

iterate

type: number | string default: 1

This property accepts a number representing the number of times the animation should repeat. You can also pass the string 'infinite' to repeat until the end of time.

direction

type: string default: 'normal'

This property accepts a number representing the animation-direction property.

accepted values: 'normal' | 'reverse' | 'alternate' | 'alternate-reverse'

`waypoint`

type: object

The waypoint prop is used to set animation(s) when the Bling wrapper component enters and leaves the viewport.

Properties:

position

type: string options: 'above' | 'below' default: 'above'

Places the waypoint above or below the wrapped component(s) or element(s).

topOffset

type: string || number examples: 100 | -100 | '100px' | '100%' default: '0px'

bottomOffset

type: string || number examples: 100 | -100 | '100px' | '100%' default: '0px'

The topOffset and bottomOffset properties control the top and bottom boundaries of the waypoint component and can be a little tricky to grasp at first. You can provide a number, which represents pixels. You can also represent pixels, percentages, etc. as strings. (eg. '100%')

If you set topOffset:'100px', this can be thought of like pushing the top boundary of the page down 100 pixels. This means that if you are scrolling up from the bottom, your leave animation would be triggered when the waypoint got to 100 pixels below the top of the screen. And if you are scrolling down from the very top, the enter animation will not be triggered until it reaches 100 pixels below the top of the screen.

If you set bottomOffset:'100px', this can be thought of like pushing the bottom boundary of the page up 100 pixels. This means that if you are scrolling down from the top, your leave animation would be triggered when the waypoint got to 100 pixels above the bottom of the screen. And if you are scrolling up from the very bottom, the enter animation will not be triggered until it reaches 100 pixels above the bottom of the screen.

Hopefully that makes sense. If you are still blurry, you might find this explanation from react-waypoint useful:

topOffset can either be a number, in which case its a distance from the top of the container in pixels, or a string value. Valid string values are of the form "20px", which is parsed as pixels, or "20%", which is parsed as a percentage of the height of the containing element. For instance, if you pass "-20%", and the containing element is 100px tall, then the waypoint will be triggered when it has been scrolled 20px beyond the top of the containing element.

enter

type: object || array (required)

leave

type: object || array (required)

The enter and leave properties are used to define the animations and animation details for when the Bling component enters and leaves the viewport. These properties have the same structure as the animate prop and are defined the same way, except as properties on the waypoint prop object.

onEnter

type: function

onLeave

type: function

Both the onEnter and onLeave properties accept a callback that you can provide for when the Bling component enters or leaves the viewport respectively. The onEnter and onLeave callbacks provide you with three values in the following order:

currentPosition - Either 'inside' or 'outside' (the boundaries)

previousPosition- Either 'inside' or 'outside' (the boundaries)

event

Styling the `Bling` component

The bling component can be styled in a number of different ways:

With inline styles

<Bling
  style={{ border: '2px solid firebrick' }}
  ...
/>

By extending the component with styled-components

const StyledBling = styled(Bling)`
  position: fixed;
  width: 100%;
  text-align: center;
  z-index: 9.97999999890000033531123335706e29;
`;

By using the .bling class

Styles created with the .bling class will be applied to all Bling components rendered on the page. Maybe this is what you want. If not, consider the other styling options.

.bling {
  position: fixed;
  width: 100%;
  text-align: center;
  z-index: 9.97999999890000033531123335706e29;
}

Example components

Using the animate prop

<Bling
  animate={[
    {
      animation: merge(tada, flip),
      duration: 2,
      iterate: 2,
      direction: 'alternate',
    },
    {
      animation: fadeOut,
      duration: 3,
      delay: 2,
    },
  ]}
  render={<h1>Hello</h1>}
/>

Using the waypoint prop

<Bling
  waypoint={{
    onEnter: (currentPosition, previousPosition, event) => {
      console.log(currentPosition, previousPosition, event);
    },
    onLeave: (currentPosition, previousPosition, event) => {
      console.log(currentPosition, previousPosition, event);
    },
    position: 'above',
    enter: {
      animation: merge(tada, flip),
      duration: 2,
    },
    leave: [
      {
        animation: tada,
        duration: 3,
      },
      {
        animation: fadeOut,
        duration: 3,
      },
    ],
  }}
  render={<h1>Hello</h1>}
/>

List of available animations

bouceOut bounce bounceIn bounceInDown bounceInLeft bounceInRight bounceInUp bounceOutDown bounceOutLeft bounceOutRight bounceOutUp fadeIn fadeInDown fadeInDownBig fadeInLeft fadeInLeftBig fadeInRight fadeInRightBig fadeInUp fadeInUpBig fadeOut fadeOutDown fadeOutDownBig fadeOutLeft fadeOutLeftBig fadeOutRight fadeOutRightBig fadeOutUp fadeOutUpBig flash flip flipInX flipInY flipOutX flipOutY headShake hinge jello lightSpeedIn lightSpeedOut pulse rollIn rollOut rotateIn rotateInDownLeft rotateInDownRight rotateInUpLeft rotateInUpRight rotateOut rotateOutDownLeft rotateOutDownRight rotateOutUpLeft rotateOutUpRight rubberBand shake slideInDown slideInLeft slideInRight slideInUp slideOutDown slideOutLeft slideOutRight slideOutUp swing tada wobble zoomIn zoomInDown zoomInLeft zoomInRight zoomInUp zoomOut zoomOutDown zoomOutLeft zoomOutRight zoomOutUp

More about `merge`

From the react-animations README:

react-animations also exports a merge function that takes two animations and returns a new animation that combines the transforms from both. This is experimental and wont work (well) with animations that have conflicting transforms, such as fadeIn and fadeOut. The merged animation can be used just like any of the imported animations.

Design Decisions

While creating this library, I went back and forth between two approaches to handling arrays of animations:

The current (and more verbose) approach:

<Bling
  animate={[
    {
      animation: fadeIn,
      duration: 3,
    },
    {
      animation: tada,
      duration: 2,
      iterate: 2,
    },
    {
      animation: fadeOut,
      duration: 4,
    },
  ]}
  render={<p>Go react-bling!</p>}
/>

and the more succinct approach:

<Bling
  animate={{
    animation: [fadeIn, tada, fadeOut],
    duration: [3, 2, 4],
    delay: [0, 0, 1],
    iterate: [1, 2, 1],
  }}
  render={<p>Go react-bling!</p>}
/>

Ultimately, I decided to go with the more verbose approach as I found it easier to read, understand and work with. Imagine you pass an array of three animations but an array of only two durations. Should the last animation use the previous duration or the default duration value? I find it much easier to explicitly define the properties for each animation with the assumption that the defaults are applied if no value is provided.

Also, if you decide to change the order of animations later, it's much easier when they are grouped together as objects as opposed to each value being a part of a seperate array.

Made with :green_heart: by a vegan