Features

• 🚥 Render timelines in three different modes (Horizontal, Vertical, Vertical-Alternating).
• 📺  Auto play the timeline with the slideshow mode.
• 🖼️  Display Images & Videos in the timeline with ease.
• ⌨  Keyboard accessible.
• 🔧  Render custom content easily.
• 🌿  Nested timelines.
• ⚡  Data driven API.
• 🎨  Customize colors with ease.
• 🎭  Use custom icons in the timeline.
• 💪  Built with Typescript.
• 🎨  Styled with emotion.

Table of Contents

• ⚡ Installation
• Getting Started
  • 🚥Vertical Mode
  • 🚥Vertical Alternating
• Props
  • Mode
  • Timeline item Model
  • ⌨Keyboard Navigation
  • Scrollable
  • 📺Media
  • Text overlay mode
  • 🛠Rendering custom content
  • 🎭Custom icons for the Timeline
  • Nested Timelines
  • Slideshow
  • Outline
  • Item Width
  • Media Settings
  • 🎨Theme
  • Customize Font sizes
  • Customize alt text for buttons
• Using custom class names
• 📦CodeSandbox Examples
• Kitchen Sink
• 📚Storybook
• 🔨Build Setup
• 🧪Tests
• 🤝Contributing
• 🧱Built with
• Meta
• Contributors ✨

⚡ Installation

// install with yarn
yarn add react-chrono

// or with npm
npm install react-chrono

Getting Started

Please make sure you wrap the component in a container that has a width and height.

When no mode is specified, the component defaults to HORIZONTAL mode. Please check props for all the available options.

  import React from "react"
  import { Chrono } from "react-chrono";

  const Home = () => {
    const items = [{
      title: "May 1940",
      cardTitle: "Dunkirk",
      url: "http://www.history.com",
      cardSubtitle:"Men of the British Expeditionary Force (BEF) wade out to..",
      cardDetailedText: "Men of the British Expeditionary Force (BEF) wade out to..",
      media: {
        type: "IMAGE",
        source: {
          url: "http://someurl/image.jpg"
        }
      }
    }, ...];

    return (
      <div style={{ width: "500px", height: "400px" }}>
        <Chrono items={items} />
      </div>
    )
  }

🚥Vertical Mode

To render the timeline vertically use the VERTICAL mode

<div style={{ width: '500px', height: '950px' }}>
  <Chrono items={items} mode="VERTICAL" />
</div>

🚥Vertical Alternating

In VERTICAL_ALTERNATING mode the timeline is rendered vertically with cards alternating between left and right side.

<div style={{ width: '500px', height: '950px' }}>
  <Chrono items={items} mode="VERTICAL_ALTERNATING" />
</div>

Props

name	description	default
activeItemIndex	Selects the active timeline item on load.	0
allowDynamicUpdate	Allows timeline items to be updated dynamically.	false
borderLessCards	Removes the border & shadow from the timeline cards.	false
buttonTexts	Customize the alt text for all buttons
cardHeight	Sets the minimum height of the timeline card.	200
cardLess	Disables timeline cards on both horizontal and vertical modes.	false
cardPositionHorizontal	Positions the card in HORIZONTAL mode. can be either TOP or BOTTOM.
cardWidth	Sets the maximum width of the timeline card.
classNames	Prop to apply custom class names for the different card elements
contentDetailsHeight	Prop to control the height of the details section. This applies only if you are using the cardDetailedText. Refer TimelineItem model for more info	150
disableAutoScrollOnClick	Disables the timeline from auto-scrolling when a timeline card is clicked.	false
disableClickOnCircle	Disables click action on the circular points.	false
disableNavOnKey	Disables keyboard navigation.	false
enableDarkToggle	Enables the toggle switch for dark mode.	false
enableOutline	Enables the outline menu on VERTICAL and VERTICAL_ALTERNATING mode.	false
flipLayout	Flips the layout (RTL).	false
focusActiveItemOnLoad	Setting this to true automatically scrolls and focuses the activeItemIndex on load	false
fontSizes	Property to customize the font sizes
hideControls	Hides the navigation controls.	false
itemWidth	Width of the timeline section in HORIZONTAL mode.	300
items	Collection of Timeline Item Model.	[]
lineWidth	Prop to customize the width of the timeline track line.	3px
mediaHeight	Sets the minimum height of the media element. Applicable only when a image or a video is embedded in the card	200
mediaSettings	Configures certain media specific layout settings. Refer mediaSettings for more info
mode	Sets the mode of the component. can be HORIZONTAL, VERTICAL or VERTICAL_ALTERNATING.	VERTICAL_ALTERNATING
nestedCardHeight	Sets the height of the nested timeline card	150
onItemSelected	Callback invoked on a item selection. passes all of the data pertinent to the item.
onScrollEnd	Use the onScrollEnd to detect the end of the timeline.
onThemeChange	Callback invoked when the theme is changed. Triggered via enableDarkToggle
scrollable	Makes the timeline scrollable (applicable for VERTICAL & VERTICAL_ALTERNATING).	true
showAllCardsHorizontal	In horizontal mode, only the active card is displayed. With this prop, you can display all the cards.	false
slideItemDuration	Duration (in ms), the timeline card is active during a slideshow.	5000
slideShow	Enables the slideshow control.	false
textOverlay	Displays text as a overlay on top of media elements. Refer Text Overlay for more info	false
theme	Prop to customize the colors. Refer Theme for more info
timelinePointDimension	Dimensions of the circular points on the timeline	false
timelinePointShape	Prop to configure the shape of the timeline points. can be circle, square, diamond	circle
titleDateFormat	date format to be used when date is passed for each timeline item. supports all dayjs format.	'MMM DD, YYYY'
useReadMore	Enables or disables the "read more" button. The "read more" button is only available if the text content on the card is taller than the card itself.	true

Mode

react-chrono supports three modes HORIZONTAL, VERTICAL and VERTICAL_ALTERNATING. No additional setting is required.

<Chrono items={items} mode="HORIZONTAL" />

<Chrono items={items} mode="VERTICAL" />

<Chrono items={items} mode="VERTICAL_ALTERNATING" />

Timeline item Model

name	description	type
cardDetailedText	detailed text displayed in the timeline card	String or String[]
cardSubtitle	text displayed in the timeline card	String
cardTitle	title that is displayed on the timeline card	String
date	date to be used in the title. when used, this will override the title property	Date
media	media object to set image or video	Object
timelineContent	render custom content instead of text.This prop has higher precedence over cardDetailedText	ReactNode
title	title of the timeline item	String
url	url to be used in the title	String

{
  title: "May 1940",
  cardTitle: "Dunkirk",
  cardSubtitle:
    "Men of the British Expeditionary Force (BEF) wade out to a destroyer during the evacuation from Dunkirk.",
  cardDetailedText: ["paragraph1", "paragraph2"],
  timelineContent: <div>Custom content</div>,
}

if you have a large text to display(via cardDetailedText) and want to split the text into paragraphs, you can pass an array of strings.

each array entry will be created as a paragraph inside the timeline card.

⌨Keyboard Navigation

The timeline can be navigated via keyboard.

• For HORIZONTAL mode use your LEFT RIGHT arrow keys for navigation.
• For VERTICAL or VERTICAL_ALTERNATING mode, the timeline can be navigated via the UP DOWN arrow keys.
• To easily jump to the first item or the last item in the timeline, use HOME or END keys.

To disable keyboard navigation set disableNavOnKey to true.

<Chrono items={items} disableNavOnKey />

Scrollable

With the scrollable prop, you can enable scrolling on both VERTICAL and VERTICAL_ALTERNATING modes.

<Chrono items={items} scrollable />

The scrollbar is not shown by default. To enable the scrollbar, pass an object with prop scrollbar to scrollable prop.

<Chrono items={items} scrollable={{ scrollbar: true }} />

📺Media

Both images and videos can be embedded in the timeline.

Just add the media attribute to the Timeline Item model and the component will take care of the rest.

To embed a image

{
  title: "May 1940",
  cardTitle: "Dunkirk",
  media: {
    name: "dunkirk beach",
    source: {
      url: "http://someurl/image.jpg"
    },
    type: "IMAGE"
  }
}

To embed a video

Videos start playing automatically when active and will be automatically paused when not active.

Like images, videos are also automatically hidden when not in the visible viewport of the container.

{
  title: "7 December 1941",
  cardTitle: "Pearl Harbor",
  media: {
    source: {
      url: "/pearl-harbor.mp4",
      type: "mp4"
    },
    type: "VIDEO",
    name: "Pearl Harbor"
  }
}

To embed YouTube videos, use the right embed url.

{
  title: "7 December 1941",
  cardTitle: "Pearl Harbor",
  media: {
    source: {
      url: "https://www.youtube.com/embed/f6cz9gtMTeI",
      type: "mp4"
    },
    type: "VIDEO",
    name: "Pearl Harbor"
  }
}

Text overlay mode

The textOverlay prop allows you to overlay text on top of a media element in a card.To enable the text overlay feature, simply add the text property to the items array in your Chrono timeline data. Here's an example:

Copy code
import { Chrono } from 'react-chrono';

const items = [
  {
    title: 'First item',
    media: {
      type: 'IMAGE',
      source: {
        url: 'https://example.com/image.jpg',
      },
    },
    text: 'This is the caption for the first item.',
  },
];

function MyTimeline() {
  return (
    <Chrono items={items} textOverlay />
  );
}

The user can click on the expand button to expand the text and see more details. Here's what it looks like:

With the textOverlay prop, you can give your timeline a modern and sleek look, and provide additional context or information about each item.

🛠Rendering custom content

The Timeline cards of the component can also support embedded custom content. To insert custom content, pass the blocked elements between the Chrono tags. For instance, the below code snippet will generate two timeline items, where each div element will be automatically converted into a timeline item and inserted into the timeline card. The items collection mentioned in the code is completely optional, and custom rendering is supported on all three modes.

Copy code
<Chrono mode="VERTICAL">
  <div>
    <p>Lorem Ipsum. Lorem Ipsum. Lorem Ipsum</p>
  </div>
  <div>
    <img src="<url to  a nice image" />
  </div>
</Chrono>

Note that the items collection will also work well with any custom content that is passed. In the following code snippet, the title and cardTitle are set for the custom contents.

Copy code
const items = [
  { title: 'Timeline title 1', cardTitle: 'Card Title 1' },
  { title: 'Timeline title 2', cardTitle: 'Card Title 2' },
];

<Chrono mode="VERTICAL" items={items}>
  <div>
    <p>Lorem Ipsum. Lorem Ipsum. Lorem Ipsum</p>
  </div>
  <div>
    <img src="<url to  a nice image" />
  </div>
</Chrono>;

🎭Custom icons for the Timeline

To utilize personalized icons on the timeline, enclose a collection of images between the chrono tags, wrapped in a container.

The icons are arranged sequentially; meaning, the first image that you pass in will be used as the icon for the first timeline item, and so on.

It is important to note that the image collection must be passed in inside a container with the designated chrono-icons className. This is a required convention, as the component relies on this className to select the appropriate images.

<Chrono items={items} mode="VERTICAL_ALTERNATING">
  <div className="chrono-icons">
    <img src="image1.svg" alt="image1" />
    <img src="image2.svg" alt="image2" />
  </div>
</Chrono>

custom icons also works if you are rendering custom content inside the cards.

<Chrono mode="VERTICAL" items={items}>
  <div>
    <p>Lorem Ipsum. Lorem Ipsum. Lorem Ipsum</p>
  </div>
  <div>
    <img src="<url to  a nice image" />
  </div>
  <div className="chrono-icons">
    <img src="image1.svg" alt="image1" />
    <img src="image2.svg" alt="image2" />
  </div>
</Chrono>

Nested Timelines

Nested timelines in React-Chrono allow you to display timelines within timeline cards. This feature is data-driven, which means that if a timeline item has an items array, the component will automatically attempt to render the nested timeline inside the timeline card.

To use nested timelines, simply provide an array of items within the items property of a timeline item. The component will then take care of rendering the nested timeline for you.

You can also adjust the height of the nested timeline card using the nestedCardHeight prop. This allows you to control the size of the card to fit your specific use case.

const items = [
  {
    title: 'Timeline title 1',
    cardTitle: 'Card Title 1',
    items: [
      { cardTitle: 'nested card title 1' },
      { cardTitle: 'nested card title 2' },
    ],
  },
  { title: 'Timeline title 2', cardTitle: 'Card Title 2' },
];

<Chrono mode="VERTICAL" items={items}></Chrono>;

Slideshow

Enabling the slideshow feature can be done by setting the slideShow prop to true. Additionally, an optional slideItemDuration prop can be set to determine the time delay between cards.

Enabling this prop will cause the play button to appear in the timeline control panel. Use the slideShowType prop to set the type of slideshow animation.

Mode	Default Slideshow Type
VERTICAL	reveal
VERTICAL_ALTERNATING	slide_from_sides
HORIZONTAL	slide_in

<Chrono
  items={items}
  slideShow
  slideItemDuration={4500}
  slideShowType="reveal"
/>

The slideshow can be cancelled by clicking on the stop button in the control panel or by pressing the ESC key.

Outline

With enableOutline prop you can enable outline on the timelines and quickly jump to a specific timeline item. The outlines are only supported on VERTICAL and VERTICAL_ALTERNATING modes.

<Chrono items={items} enableOutline />

Item Width

The itemWidth prop can be used to set the width of each individual timeline sections. This setting is applicable only for the HORIZONTAL mode.

Media Settings

Use media settings to align the media or change how a image is displayed in the card.

Name	Description	Type	Default
align	aligns the media. can be left, right or center	string	center
fit	fits the image. can be cover or contain	string	cover

<Chrono items={items} mediaSettings={{ align: 'right', fit: 'contain' }} />

🎨Theme

Customize colors with the theme prop.

<Chrono
  items={items}
  theme={{
    primary: 'red',
    secondary: 'blue',
    cardBgColor: 'yellow',
    titleColor: 'black',
    titleColorActive: 'red',
  }}
/>

Customize Font sizes

Use the fontSizes prop to customize the font sizes of the timeline card.

<Chrono
  items={data}
  mode="HORIZONTAL"
  fontSizes={{
    cardSubtitle: '0.85rem',
    cardText: '0.8rem',
    cardTitle: '1rem',
    title: '1rem',
  }}
></Chrono>

Customize alt text for buttons

With the buttonTexts prop, you can change the button's alt text.

<Chrono
  items={data}
  mode="HORIZONTAL"
  buttonTexts={{
    first: 'Jump to First',
    last: 'Jump to Last',
    next: 'Next',
    previous: 'Previous',
  }}
></Chrono>

Defaults

Property	Value
first	'Go to First'
last	'Go to Last'
next	'Next'
play	'Play Slideshow'
previous	'Previous'

Using custom class names

You can use the classNames prop to employ your own class names. The subsequent example illustrates how you can use custom class names on different elements.

<Chrono
  className="my-timeline"
  items={items}
  classNames={{
    card: 'my-card',
    cardMedia: 'my-card-media',
    cardSubTitle: 'my-card-subtitle',
    cardText: 'my-card-text',
    cardTitle: 'my-card-title',
    controls: 'my-controls',
    title: 'my-title',
  }}
/>

📦CodeSandbox Examples

• Horizontal Basic
• Horizontal - Show all cards
• Vertical basic
• Vertical Alternating
• Vertical All Images
• Vertical Custom content
• Vertical Custom content with items collections
• Custom Icons

Kitchen Sink

• Kitchen Sink

📚Storybook

Deep dive into wide variety of examples hosted as a Storybook.

• Horizontal Collection
• Vertical Collection

🔨Build Setup

# install dependencies
pnpm install

# start dev
pnpm dev

# run css linting
pnpm lint:css

# eslint
pnpm eslint

# prettier
pnpm lint

# package lib
pnpm rollup

🧪Tests

  # run unit tests
  pnpm test

  # run cypress tests
  pnpm cypress:test

🤝Contributing

1. Fork it
2. Create your feature branch (git checkout -b new-feature)
3. Commit your changes (git commit -am 'Add feature')
4. Push to the branch (git push origin new-feature)
5. Create a new Pull Request

🧱Built with

• Typescript.
• Styled with emotion.

Meta

Huge thanks to BrowserStack for the Open Source License!

Distributed under the MIT license. See LICENSE for more information.

Prabhu Murthy – @prabhumurthy2 – prabhu.m.murthy@gmail.com https://github.com/prabhuignoto

Contributors ✨

Thanks goes to these wonderful people (emoji key):

Alois 📖	Koji 📖	Alexandre Girard 💻	Ryuya 📖	Taqi Abbas 💻	megasoft78 💻	Eric（书生） 💻
Christophe Bernard 💻

This project follows the all-contributors specification. Contributions of any kind welcome!