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
  • Item Width
  • 🎥Media Settings
  • Breakpoint
  • 🎨Theme
  • Customize Font sizes
  • Customize alt text for buttons
  • Search Functionality
• 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 ensure you wrap the component in a container with specified width and height dimensions.

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

Below are the available configuration options for the component:

Name	Default	Description
activeItemIndex	0	Selects the active timeline item when loading.
allowDynamicUpdate	false	Enables or disables dynamic updates of timeline items.
borderLessCards	false	Removes borders and shadows from the timeline cards.
buttonTexts		Customizes the alternative text for all buttons.
cardHeight	200	Defines the minimum height of timeline cards.
cardLess	false	Disables timeline cards in both horizontal and vertical layouts.
cardPositionHorizontal		Positions the card in horizontal mode. Options: TOP or BOTTOM.
cardWidth		Sets the maximum width of timeline cards.
classNames		Applies custom class names to different card elements.
contentDetailsHeight	150	Controls the height of the details section if using cardDetailedText. Refer to TimelineItem model for more info.
disableAutoScrollOnClick	false	Prevents auto-scrolling when a timeline card is clicked.
disableClickOnCircle	false	Disables the click action on circular points.
disableInteraction	false	Disables all the interactions with the Timeline.
disableNavOnKey	false	Turns off keyboard navigation.
disableTimelinePoint	false	Disables the timeline point in both HORIZONTAL and VERTICAL mode.
enableBreakPoint	true	Automatically switches to vertical mode when the vertical breakpoint is reached.
enableDarkToggle	false	Adds a toggle switch for dark mode.
enableLayoutSwitch	true	Switches the timeline layout
enableQuickJump	true	Allows to quickly jump to a timeline item
flipLayout	false	Reverses the layout (Right to Left).
focusActiveItemOnLoad	false	Automatically scrolls to and focuses on the activeItemIndex when loading.
fontSizes		Allows customization of font sizes.
highlightCardsOnHover	false	Highlights the card on hover
items	[]	A collection of Timeline Item Models.
itemWidth	300	Sets the width of the timeline section in horizontal mode.
lineWidth	3px	Adjusts the width of the timeline track line.
mediaHeight	200	Sets the minimum height for media elements like images or videos in the card.
mediaSettings		Configures settings specific to media layout. Refer to mediaSettings for more info.
mode	VERTICAL_ALTERNATING	Sets the component mode. Options: HORIZONTAL, VERTICAL, VERTICAL_ALTERNATING.
nestedCardHeight	150	Defines the height of nested timeline cards.
noUniqueId	false	Prevents generating a unique id for the table wrapper.
onItemSelected		Invokes a callback on item selection, passing relevant data.
onScrollEnd		Detects the end of the timeline via onScrollEnd.
onThemeChange		Invokes a callback when the theme changes, triggered via enableDarkToggle.
parseDetailsAsHTML	false	Parses the cardDetailedText as HTML.
responsiveBreakPoint	1024	Break point at which the timeline changes to VERTICAL mode when VERTICAL_ALTERNATING is the default mode
scrollable	true	Makes the timeline scrollable in VERTICAL and VERTICAL_ALTERNATING modes.
showAllCardsHorizontal	false	Displays all cards in horizontal mode. By default, only the active card is shown.
slideItemDuration	5000	Sets the duration (in milliseconds) that a timeline card is active during a slideshow.
slideShow	false	Enables slideshow control.
textDensity	HIGH	Configures the amount of text to be displayed in each timeline card. Can be either HIGH or LOW
textOverlay	false	Displays text as an overlay on media elements. Refer to Text Overlay for more info.
theme		Customizes colors. Refer to Theme for more info.
timelinePointDimension		Defines the dimensions of circular points on the timeline.
timelinePointShape	circle	Configures the shape of timeline points. Options: circle, square, diamond.
titleDateFormat	'MMM DD, YYYY'	Formats the date for each timeline item. Supports all dayjs formats.
toolbarPosition	TOP	Configures the position of the toolbar. Can be TOP or BOTTOM
uniqueId		Used with noUniqueId to set a custom unique id for the wrapper.
useReadMore	true	Enables or disables the "read more" button. Available if text content on the card is taller than the card itself.
disableToolbar	false	Hides the toolbar / control panel
searchPlaceholder	"Search..."	Customizes the placeholder text for the search input.
searchAriaLabel	"Search timeline"	Sets the aria-label for the search input for accessibility.
clearSearch	"Clear search"	Customizes the text for the clear search button.

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:

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.

<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.

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 - if a timeline item has an items array, the component will automatically 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

You can enable the slideshow feature 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.

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 an 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' }} />

Breakpoint

Use the breakpoint feature to automatically switch the timeline to VERTICAL mode when there isn't enough space for VERTICAL_ALTERNATING mode, such as on mobile devices. Set the auto switch to happen by enabling the enableBreakPoint prop and specifying the pixel limit with the verticalBreakPoint prop.

<Chrono items={items} enableBreakPoint verticalBreakPoint={400} />

🎨Theme

Customize colors with the theme prop.

Checkout the documentation for the complete list of available theme properties.

<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'

Search Functionality

React-Chrono includes a powerful search feature that allows users to quickly find specific content within your timeline. The search functionality is included in the toolbar by default and can be customized with several props.

The search feature scans through all text content in your timeline items, including titles, card titles, subtitles, and detailed text. When matches are found, users can navigate through the results, and the timeline will automatically focus on the matching items.

<Chrono
  items={data}
  searchPlaceholder="Find in timeline..."
  searchAriaLabel="Search through timeline events"
  clearSearch="Reset search"
/>

You can hide the search functionality (along with the rest of the toolbar) by setting the disableToolbar prop to true.

Using custom class names

You can use the classNames prop to apply your own class names. The following example shows how to 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

  # run cypress tests in headless mode
  pnpm cypress:headless

  # run cypress tests in quiet mode
  pnpm cypress:quiet

🤝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 – [email protected] 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!