React Calendar Timeline

A modern and responsive React timeline component.

🎉 Version 0.30.0-beta.1 Now Available!

We're excited to announce the beta release of v0.30.0 which includes:

• Full TypeScript rewrite
• Vite as bundler
• Updated dependencies to latest versions
• React 18+ support

The beta version is available via:

1npm install react-calendar-timeline@beta

We encourage users to try out the beta and provide feedback before the stable release. Please report any issues on GitHub.

Note: Testing framework has been updated and some tests are currently being migrated.

⚠️⚠️⚠️⚠️ HELP WANTED

please email me ahmad.ilaiwi@gmail.com and we will setup some time to speak and see if you can help maintain this library.

Checkout the examples here!

Contents

• Getting Started
• Usage
• API
• Timeline Markers
• Timeline Headers
• FAQ
• Contribute

Getting started

1# via yarn
2yarn add react-calendar-timeline
3
4# via npm
5npm install --save react-calendar-timeline

react-calendar-timeline has react, react-dom, moment and interactjs as peer dependencies.

Usage

At the very minimum:

1import Timeline from 'react-calendar-timeline'
2// make sure you include the timeline stylesheet or the timeline will not be styled
3import 'react-calendar-timeline/lib/Timeline.css'
4import moment from 'moment'
5
6const groups = [{ id: 1, title: 'group 1' }, { id: 2, title: 'group 2' }]
7
8const items = [
9  {
10    id: 1,
11    group: 1,
12    title: 'item 1',
13    start_time: moment(),
14    end_time: moment().add(1, 'hour')
15  },
16  {
17    id: 2,
18    group: 2,
19    title: 'item 2',
20    start_time: moment().add(-0.5, 'hour'),
21    end_time: moment().add(0.5, 'hour')
22  },
23  {
24    id: 3,
25    group: 1,
26    title: 'item 3',
27    start_time: moment().add(2, 'hour'),
28    end_time: moment().add(3, 'hour')
29  }
30]
31
32ReactDOM.render(
33  <div>
34    Rendered by react!
35    <Timeline
36      groups={groups}
37      items={items}
38      defaultTimeStart={moment().add(-12, 'hour')}
39      defaultTimeEnd={moment().add(12, 'hour')}
40    />
41  </div>,
42  document.getElementById('root')
43)

API

NB! All props need to be immutable. For example, this means if you wish to change the title of one of your items, please pass in a whole new items array instead of changing the title in the old array. Here's more info.

The component can take many props:

groups

Expects either a vanilla JS array or an immutableJS array, consisting of objects with the following attributes:

1{
2  id: 1,
3  title: 'group 1',
4  rightTitle: 'title in the right sidebar',
5  stackItems?: true,
6  height?: 30
7}

If you use the right sidebar, you can pass optional rightTitle property here. If you want to overwrite the calculated height with a custom height, you can pass a height property as an int in pixels here. This can be very useful for categorized groups.

items

Expects either a vanilla JS array or an immutableJS array, consisting of objects with the following attributes:

1{
2  id: 1,
3  group: 1,
4  title: 'Random title',
5  start_time: 1457902922261,
6  end_time: 1457902922261 + 86400000,
7  canMove: true,
8  canResize: false,
9  canChangeGroup: false,
10  itemProps: {
11    // these optional attributes are passed to the root <div /> of each item as <div {...itemProps} />
12    'data-custom-attribute': 'Random content',
13    'aria-hidden': true,
14    onDoubleClick: () => { console.log('You clicked double!') },
15    className: 'weekend',
16    style: {
17      background: 'fuchsia'
18    }
19  }
20}

The preferred (fastest) option is to give Unix timestamps in milliseconds for start_time and end_time. Objects that convert to them (JavaScript Date or moment()) will also work, but will be a lot slower.

defaultTimeStart and defaultTimeEnd

Unless overridden by visibleTimeStart and visibleTimeEnd, specify where the calendar begins and where it ends. This parameter expects a Date or moment object.

visibleTimeStart and visibleTimeEnd

The exact viewport of the calendar. When these are specified, scrolling in the calendar must be orchestrated by the onTimeChange function. This parameter expects a Unix timestamp in milliseconds.

Note that you need to provide either defaultTimeStart/End or visibleTimeStart/End for the timeline to function

buffer

a number (default to 3) which represents the extra timeline rendered on right and lift of the visible area which the user will scroll through before the time rerenders.

more explication in section behind the scenes

Note: setting buffer to 1 will disable the scrolling on the timeline

selected

An array with id's corresponding to id's in items (item.id). If this prop is set you have to manage the selected items yourself within the onItemSelect handler to update the property with new id's and use onItemDeselect handler to clear selection. This overwrites the default behaviour of selecting one item on click.

keys

An array specifying keys in the items and groups objects. Defaults to

1{
2  groupIdKey: 'id',
3  groupTitleKey: 'title',
4  groupRightTitleKey: 'rightTitle',
5  itemIdKey: 'id',
6  itemTitleKey: 'title',    // key for item div content
7  itemDivTitleKey: 'title', // key for item div title (<div title="text"/>)
8  itemGroupKey: 'group',
9  itemTimeStartKey: 'start_time',
10  itemTimeEndKey: 'end_time',
11}

className

Additional class names as a string for the root Timeline element.

sidebarWidth

Width of the sidebar in pixels. If set to 0, the sidebar is not rendered. Defaults to 150.

sidebarContent

Everything passed here will be displayed above the left sidebar. Use this to display small filters or so. Defaults to null.

rightSidebarWidth

Width of the right sidebar in pixels. If set to 0, the right sidebar is not rendered. Defaults to 0.

rightSidebarContent

Everything passed here will be displayed above the right sidebar. Use this to display small filters or so. Defaults to null.

dragSnap

Snapping unit when dragging items. Defaults to 15 * 60 * 1000 or 15min. When so, the items will snap to 15min intervals when dragging.

minResizeWidth

The minimum width, in pixels, of a timeline entry when it's possible to resize. If not reached, you must zoom in to resize more. Default to 20.

lineHeight

Height of one line in the calendar in pixels. Default 30

itemHeightRatio

What percentage of the height of the line is taken by the item? Default 0.65

minZoom

Smallest time the calendar can zoom to in milliseconds. Default 60 * 60 * 1000 (1 hour)

notes: please note than second won't show up unless you change this to 60 * 1000

maxZoom

Largest time the calendar can zoom to in milliseconds. Default 5 * 365.24 * 86400 * 1000 (5 years)

clickTolerance

How many pixels we can drag the background for it to be counted as a click on the background. Default 3

canMove

Can items be dragged around? Can be overridden in the items array. Defaults to true

canChangeGroup

Can items be moved between groups? Can be overridden in the items array. Defaults to true

canResize

Can items be resized? Can be overridden in the items array. Accepted values: false, "left", "right", "both". Defaults to "right". If you pass true, it will be treated as "right" to not break compatibility with versions 0.9 and below.

useResizeHandle

Append a special .rct-drag-right handle to the elements and only resize if dragged from there. Defaults to false

stackItems

Stack items under each other, so there is no visual overlap when times collide. Can be overridden in the groups array. Defaults to false. Requires millisecond or Moment timestamps, not native JavaScript Date objects.

traditionalZoom

Zoom in when scrolling the mouse up/down. Defaults to false

itemTouchSendsClick

Normally tapping (touching) an item selects it. If this is set to true, a tap will have the same effect, as selecting with the first click and then clicking again to open and send the onItemClick event. Defaults to false.

timeSteps

With what step to display different units. E.g. 15 for minute means only minutes 0, 15, 30 and 45 will be shown.

Default:

1{
2  second: 1,
3  minute: 1,
4  hour: 1,
5  day: 1,
6  month: 1,
7  year: 1
8}

scrollRef

Ref callback that gets a DOM reference to the scroll body element. Can be useful to programmatically scroll.

onItemDrag(itemDragObject)

Called when an item is moving or resizing. Returns an object with the following properties:

property	type	description
eventType	string	retuns either move or resize
itemId	number	ID of the item being moved or resized
time	number	UNIX timestamp in milliseconds
edge	string	on resize, returns a value of either left or right
newGroupOrder	number	on move, index position of the new group that the item is moving to

onItemMove(itemId, dragTime, newGroupOrder)

Callback when an item is moved. Returns 1) the item's ID, 2) the new start time and 3) the index of the new group in the groups array.

onItemResize(itemId, time, edge)

Callback when an item is resized. Returns 1) the item's ID, 2) the new start or end time of the item 3) The edge that was dragged (left or right)

onItemSelect(itemId, e, time)

Called when an item is selected. This is sent on the first click on an item. time is the time that corresponds to where you click/select on the item in the timeline.

onItemDeselect(e)

Called when deselecting an item. Used to clear controlled selected prop.

onItemClick(itemId, e, time)

Called when an item is clicked. Note: the item must be selected before it's clicked... except if it's a touch event and itemTouchSendsClick is enabled. time is the time that corresponds to where you click on the item in the timeline.

onItemDoubleClick(itemId, e, time)

Called when an item was double clicked. time is the time that corresponds to where you double click on the item in the timeline.

onItemContextMenu(itemId, e, time)

Called when the item is clicked by the right button of the mouse. time is the time that corresponds to where you context click on the item in the timeline. Note: If this property is set the default context menu doesn't appear.

onCanvasClick(groupId, time, e)

Called when an empty spot on the canvas was clicked. Get the group ID and the time as arguments. For example open a "new item" window after this.

onCanvasDoubleClick(groupId, time, e)

Called when an empty spot on the canvas was double clicked. Get the group ID and the time as arguments.

onCanvasContextMenu(groupId, time, e)

Called when the canvas is clicked by the right button of the mouse. Note: If this property is set the default context menu doesn't appear

onZoom(timelineContext, unit)

Called when the timeline is zoomed, either via mouse/pinch zoom or clicking header to change timeline units

moveResizeValidator(action, itemId, time, resizeEdge)

This function is called when an item is being moved or resized. It's up to this function to return a new version of change, when the proposed move would violate business logic.

The argument action is one of move or resize.

The argument resizeEdge is when resizing one of left or right.

The argument time describes the proposed new time for either the start time of the item (for move) or the start or end time (for resize).

The function must return a new unix timestamp in milliseconds... or just time if the proposed new time doesn't interfere with business logic.

For example, to prevent moving of items into the past, but to keep them at 15min intervals, use this code:

1function (action, item, time, resizeEdge) {
2  if (time < new Date().getTime()) {
3    var newTime = Math.ceil(new Date().getTime() / (15*60*1000)) * (15*60*1000);
4    return newTime;
5  }
6
7  return time
8}

onTimeChange(visibleTimeStart, visibleTimeEnd, updateScrollCanvas, unit)

A function that's called when the user tries to scroll. Call the passed updateScrollCanvas(start, end) with the updated visibleTimeStart and visibleTimeEnd (as unix timestamps in milliseconds) to change the scroll behavior, for example to limit scrolling.

Here is an example that limits the timeline to only show dates starting 6 months from now and ending in 6 months.

1// this limits the timeline to -6 months ... +6 months
2const minTime = moment().add(-6, 'months').valueOf()
3const maxTime = moment().add(6, 'months').valueOf()
4
5function (visibleTimeStart, visibleTimeEnd, updateScrollCanvas) {
6  if (visibleTimeStart < minTime && visibleTimeEnd > maxTime) {
7    updateScrollCanvas(minTime, maxTime)
8  } else if (visibleTimeStart < minTime) {
9    updateScrollCanvas(minTime, minTime + (visibleTimeEnd - visibleTimeStart))
10  } else if (visibleTimeEnd > maxTime) {
11    updateScrollCanvas(maxTime - (visibleTimeEnd - visibleTimeStart), maxTime)
12  } else {
13    updateScrollCanvas(visibleTimeStart, visibleTimeEnd)
14  }
15}

onBoundsChange(canvasTimeStart, canvasTimeEnd)

Called when the bounds in the calendar's canvas change. Use it for example to load new data to display. (see "Behind the scenes" below). canvasTimeStart and canvasTimeEnd are unix timestamps in milliseconds.

itemRenderer

Render prop function used to render a customized item. The function provides multiple parameters that can be used to render each item.

Parameters provided to the function has two types: context params which have the state of the item and timeline, and prop getters functions

Render props params

context

• item has the item we passed as a prop to the calendar.

• timelineContext

property	type	description
timelineWidth	number	returns the full width of the timeline.
visibleTimeStart	number	returns the exact start of view port of the calendar
visibleTimeEnd	number	returns the exact end of view port of the calendar.
canvasTimeStart	number	denotes the start time in ms of the canvas timeline
canvasTimeEnd	number	denotes the end time in ms of the canvas timeline

• itemContext

property	type	description
dimensions	object	returns the dimensions of the item which includes collisionLeft, collisionWidth, height, isDragging, left, order, originalLeft, stack, top, and width
useResizeHandle	boolean	returns the prop useResizeHandle from calendar root component
title	string	returns title to render in content element.
canMove	boolean	returns if the item is movable.
canResizeLeft	boolean	returns if the item can resize from the left
canResizeRight	boolean	returns if the item can resize from the right.
selected	boolean	returns if the item is selected.
dragging	boolean	returns if the item is being dragged
dragStart	object	returns x and y of the start dragging point of the item.
dragTime	number	current drag time.
dragGroupDelta	number	returns number of groups the item moved. if negative, moving was to top. If positive, moving was to down
resizing	boolean	returns if the item is being resized.
resizeEdge	left, right	the side from which the component is being resized form
resizeStart	number	returns the x value from where the component start moving
resizeTime	number	current resize time
width	boolean	returns the width of the item (same as in dimensions)

prop getters functions

These functions are used to apply props to the elements that you render. This gives you maximum flexibility to render what, when, and wherever you like.

Rather than applying props on the element yourself and to avoid your props being overridden (or overriding the props returned). You can pass an object to the prop getters to avoid any problems. This object will only accept some properties that our component manage so the component make sure to combine them correctly.

property	type	description
getItemProps	function(props={})	returns the props you should apply to the root item element.
getResizeProps	function(props={})	returns two sets of props to apply on the left and right elements as resizing elements if you have useResizeHandle prop set to true

• getItemProps returns the props you should apply to the root item element. The returned props are:

  • key: item id
  • ref: function to get item reference
  • className: classnames to be applied to the item
  • onMouseDown: event handler
  • onMouseUp: event handler
  • onTouchStart: event handler
  • onTouchEnd: event handler
  • onDoubleClick: event handler
  • onContextMenu: event handler
  • style: inline object

  ** the given styles will only override the styles that are not a requirement for positioning the item. Other styles like color, radius and others

  These properties can be overriden using the prop argument with properties:

  • className: class names to be added
  • onMouseDown: event handler will be called after the component's event handler
  • onMouseUp: event handler will be called after the component's event handler
  • onTouchStart: event handler will be called after the component's event handler
  • onTouchEnd: event handler will be called after the component's event handler
  • onDoubleClick: event handler will be called after the component's event handler
  • onContextMenu: event handler will be called after the component's event handler
  • style: extra inline styles to be applied to the component

• getResizeProps returns the props you should apply to the left and right resize handlers only if useResizeHandle set to true. The returned object has the props for the left element under property left and the props to be applied to the right element under right :

  • left
    • ref: function to get element reference
    • style: style to be applied to the left element
    • className: class names to be applied to left className
  • right
    • ref: function to get element reference
    • style: style to be applied to the right element
    • className: class names to be applied to left className

These properties can be override using the prop argument with properties:

• leftStyle: style to be added to left style
• rightStyle: style to be added to right style
• leftClassName: classes to be added to left handler
• rightClassName: classes to be added to right handler

example

1let items = [
2  {
3    id: 1,
4    group: 1,
5    title: 'Title',
6    tip: 'additional information',
7    color: 'rgb(158, 14, 206)',
8    selectedBgColor: 'rgba(225, 166, 244, 1)',
9    bgColor : 'rgba(225, 166, 244, 0.6)',
10    ...
11  }
12]
13
14itemRenderer: ({
15  item,
16  itemContext,
17  getItemProps,
18  getResizeProps
19}) => {
20  const { left: leftResizeProps, right: rightResizeProps } = getResizeProps()
21  return (
22    <div {...getItemProps(item.itemProps)}>
23      {itemContext.useResizeHandle ? <div {...leftResizeProps} /> : ''}
24
25      <div
26        className="rct-item-content"
27        style={{ maxHeight: `${itemContext.dimensions.height}` }}
28      >
29        {itemContext.title}
30      </div>
31
32      {itemContext.useResizeHandle ? <div {...rightResizeProps} /> : ''}
33    </div>
34  )}
35
36}

groupRenderer

React component that will be used to render the content of groups in the sidebar. Will be passed the group and isRightSidebar as props.

1let groups = [
2  {
3    id: 1,
4    title: 'Title',
5    tip: 'additional information'
6  }
7]
8
9groupRenderer = ({ group }) => {
10  return (
11    <div className="custom-group">
12      <span className="title">{group.title}</span>
13      <p className="tip">{group.tip}</p>
14    </div>
15  )
16}

resizeDetector

The component automatically detects when the window has been resized. Optionally you can also detect when the component's DOM element has been resized. To do this, pass a resizeDetector. Since bundling it by default would add ~18kb of minimized JS, you need to opt in to this like so:

1import containerResizeDetector from 'react-calendar-timeline/lib/resize-detector/container'
2
3<Timeline resizeDetector={containerResizeDetector} ... />

verticalLineClassNamesForTime(start, end)

This function is called when the vertical line is rendered. start and end are unix timestamps in milliseconds for the current column. The function should return an array of strings containing the classNames which should be applied to the column. This makes it possible to visually highlight e.g. public holidays or office hours. An example could look like (see: demo/vertical-classes):

1verticalLineClassNamesForTime = (timeStart, timeEnd) => {
2  const currentTimeStart = moment(timeStart)
3  const currentTimeEnd = moment(timeEnd)
4
5  for (let holiday of holidays) {
6    if (
7      holiday.isSame(currentTimeStart, 'day') &&
8      holiday.isSame(currentTimeEnd, 'day')
9    ) {
10      return ['holiday']
11    }
12  }
13}

Be aware that this function should be as optimized for performance as possible as it will be called on each render of the timeline (i.e. when the canvas is reset, when zooming, etc)

horizontalLineClassNamesForGroup(group)

This function is called when the horizontal line is rendered. group is the group which will be rendered into the current row. The function should return an array of strings containing the classNames which should be applied to the row. This makes it possible to visually highlight categories or important items. An example could look like:

1horizontalLineClassNamesForGroup={(group) => group.root ? ["row-root"] : []}

Timeline Markers

Timeline markers are markers that are overlayed on the canvas at specific datepoints.

Overview

Markers can be placed in the Timeline by declaring them as children of the Timeline component:

1import Timeline, {
2  TimelineMarkers,
3  CustomMarker,
4  TodayMarker,
5  CursorMarker
6} from 'react-calendar-timeline'
7
8<Timeline>
9  <TimelineMarkers>
10    <TodayMarker />
11    <CustomMarker date={today} />
12    <CustomMarker date={tomorrow}>
13      {/* custom renderer for this marker */}
14      {({ styles, date }) => {
15        const customStyles = {
16          ...styles,
17          backgroundColor: 'deeppink',
18          width: '4px'
19        }
20        return <div style={customStyles} onClick={someCustomHandler} />
21      }}
22    </CustomMarker>
23    <CursorMarker />
24  </TimelineMarkers>
25</Timeline>

Each marker allows for passing in a custom renderer via a function as a child component. This allows the user to render whatever they want (event handlers, custom styling, etc). This custom renderer receives an object with two properties:

styles: {position: 'absolute', top: 0, bottom: 0, left: number}

This object must be passed to the root component's style prop in order to be rendered properly. Note that you can merge this object with any other properties.

date: number

Date in unix timestamp of this marker. This can be used to change how your marker is rendered (or if its rendered at all)

TimelineMarkers

Wrapper for timeline markers that you want rendered.

TodayMarker

Marker that is placed on the current date/time.

interval: number | default: 10000

How often the TodayMarker refreshes. Value represents milliseconds.

children: function({styles: object, date: number}) => JSX.Element

Custom renderer for this marker. Ensure that you always pass styles to the root component's style prop as this object contains positioning of the marker.

1// custom interval
2const twoSeconds = 2000
3
4<TodayMarker interval={twoSeconds} />
5
6//custom renderer
7
8<TodayMarker>
9  {({ styles, date }) =>
10    // date is value of current date. Use this to render special styles for the marker
11    // or any other custom logic based on date:
12    // e.g. styles = {...styles, backgroundColor: isDateInAfternoon(date) ? 'red' : 'limegreen'}
13    <div style={styles} />
14  }
15</TodayMarker>

CustomMarker

Marker that is placed on the current date/time.

date: number | required

Where to place the marker on the timeline. date value is unix timestamp.

children: function({styles: object, date: number}) => JSX.Element

Custom renderer for this marker. Ensure that you always pass styles to the root component's style prop as this object contains positioning of the marker.

1const today = Date.now()
2<CustomMarker date={today} />
3
4//custom renderer
5<CustomMarker date={today}>
6  {({ styles, date }) => <div style={styles} />}
7</CustomMarker>
8
9// multiple CustomMarkers
10const markerDates = [
11  {date: today, id: 1,},
12  {date: tomorrow, id: 2,},
13  {date: nextFriday, id: 3,},
14]
15
16<TimelineMarkers>
17  {markerDates.map(marker => <CustomMarker key={marker.date} date={marker.date}/> )}
18</TimelineMarkers>

CursorMarker

Marker that is displayed when hovering over the timeline and matches where your cursor is.

children: function({styles: object, date: number}) => JSX.Element

Custom renderer for this marker. Ensure that you always pass styles to the root component's style prop as this object contains positioning of the marker.

1// render default marker for Cursor
2<CursorMarker />
3
4//custom renderer
5<CursorMarker>
6  {({ styles, date }) =>
7    // date is value of current date. Use this to render special styles for the marker
8    // or any other custom logic based on date:
9    // e.g. styles = {...styles, backgroundColor: isDateInAfternoon(date) ? 'red' : 'limegreen'}
10    <div style={styles} />
11  }
12</CursorMarker>

Timeline Headers

Timeline headers are the section above the timeline which consist of two main parts: First, the calender header which is a scrolable div containing the dates of the calendar called DateHeader. Second, is the headers for the sidebars, called SidebarHeader, the left one and optionally the right one.

Default usage

For the default case, two DateHeaders are rendered above the timeline, one primary and secondary. The secondary has the same date unit as the timeline and a primary which has a unit larger than the timeline unit by one.

For the SidebarHeaders an empty SidebarHeader will be render for the left and optionally an empty right sidebar header if rightSidebarWith exists.

Overview

To provide any custom headers for DateHeader or SidebarHeader. You need to provide basic usage to provide any custom headers. These Custom headers should be always included inside TimelineHeaders component in the component's children.

1import Timeline, {
2  TimelineHeaders,
3  SidebarHeader,
4  DateHeader
5} from 'react-calendar-timeline'
6
7<Timeline>
8  <TimelineHeaders>
9    <SidebarHeader>
10      {({ getRootProps }) => {
11        return <div {...getRootProps()}>Left</div>
12      }}
13    </SidebarHeader>
14    <DateHeader unit="primaryHeader" />
15    <DateHeader />
16  </TimelineHeaders>
17<Timeline>

Components

Custom headers are implemented through a set of component with mostly function as a child component pattern, designed to give the user the most control on how to render the headers.

TimelineHeader

Is the core component wrapper component for custom headers

props

Prop	type	description
style	object	applied to the root component of headers
className	string	applied to the root component of the headers
calendarHeaderStyle	object	applied to the root component of the calendar headers -scrolable div- DateHeader and CustomHeader)
calendarHeaderClassName	string	applied to the root component of the calendar headers -scrolable div- DateHeader and CustomHeader)
headerRef	function	used to get the ref of the header element

SidebarHeader

Responsible for rendering the headers above the left and right sidebars.

props

Prop	type	description
variant	left (default), right	renders above the left or right sidebar
children	Function	function as a child component to render the header
headerData	any	Contextual data to be passed to the item renderer as a data prop

Child function renderer

a Function provides multiple parameters that can be used to render the sidebar headers

Prop getters functions

Rather than applying props on the element yourself and to avoid your props being overridden (or overriding the props returned). You can pass an object to the prop getters to avoid any problems. This object will only accept some properties that our component manage so the component make sure to combine them correctly.

property	type	description
getRootProps	function(props={})	returns the props you should apply to the root div element.
data	any	Contextual data passed by headerData prop

• getRootProps The returned props are:

  • style: inline object style

  These properties can be override using the prop argument with properties:

  • style: extra inline styles to be applied to the component

example

1import Timeline, {
2  TimelineHeaders,
3  SidebarHeader,
4  DateHeader
5} from 'react-calendar-timeline'
6
7<Timeline>
8  <TimelineHeaders>
9    <SidebarHeader>
10      {({ getRootProps }) => {
11        return <div {...getRootProps()}>Left</div>
12      }}
13    </SidebarHeader>
14    <SidebarHeader variant="right" headerData={{someData: 'extra'}}>
15      {({ getRootProps, data }) => {
16        return <div {...getRootProps()}>Right {data.someData}</div>
17      }}
18    </SidebarHeader>
19    <DateHeader unit="primaryHeader" />
20    <DateHeader />
21  </TimelineHeaders>
22<Timeline>

Note : the Child function renderer can be a component or a function for convenience

DateHeader

Responsible for rendering the headers above calendar part of the timeline. Consists of time intervals dividing the headers in columns.

props

Prop	type	description
style	object	applied to the root of the header
className	string	applied to the root of the header
unit	second, minute, hour, day, week, month, year or primaryHeader	intervals between columns
labelFormat	Function or string	controls the how to format the interval label
intervalRenderer	Function	render prop to render each interval in the header
headerData	any	Contextual data to be passed to the item renderer as a data prop
height	number default (30)	height of the header in pixels

Note: passing primaryHeader to unit the header will act as the main header with interval unit larger than timeline unit by 1

Interval unit

intervals are decided through the prop: unit. By default, the unit of the intervals will be the same the timeline.

If primaryHeader is passed to unit, it will override the unit with a unit a unit larger by 1 of the timeline unit.

If unit is set, the unit of the header will be the unit passed though the prop and can be any unit of time from momentjs.

Label format

To format each interval label you can use 2 types of props to format which are:

• string: if a string was passed it will be passed to startTime method format which is a momentjs object .

• Function: This is the more powerful method and offers the most control over what is rendered. The returned string will be rendered inside the interval

  1  type Unit = `second` | `minute` | `hour` | `day` | `month` | `year`
  2([startTime, endTime] : [Moment, Moment], unit: Unit, labelWidth: number, formatOptions: LabelFormat = defaultFormat ) => string

Default format

by default we provide a responsive format for the dates based on the label width. it follows the following rules:

The long, mediumLong, medium and short will be be decided through the labelWidth value according to where it lays upon the following scale:

|-----`short`-----50px-----`medium`-----100px-----`mediumLong`-----150px--------`long`-----

1// default format object
2const format : LabelFormat = {
3year: {
4  long: 'YYYY',
5  mediumLong: 'YYYY',
6  medium: 'YYYY',
7  short: 'YY'
8},
9month: {
10  long: 'MMMM YYYY',
11  mediumLong: 'MMMM',
12  medium: 'MMMM',
13  short: 'MM/YY'
14},
15week: {
16  long: 'w',
17  mediumLong: 'w',
18  medium: 'w',
19  short: 'w'
20},
21day: {
22  long: 'dddd, LL',
23  mediumLong: 'dddd, LL',
24  medium: 'dd D',
25  short: 'D'
26},
27hour: {
28  long: 'dddd, LL, HH:00',
29  mediumLong: 'L, HH:00',
30  medium: 'HH:00',
31  short: 'HH'
32},
33minute: {
34  long: 'HH:mm',
35  mediumLong: 'HH:mm',
36  medium: 'HH:mm',
37  short: 'mm',
38},
39second: {
40  "long": 'mm:ss',
41  mediumLong: 'mm:ss',
42  medium: 'mm:ss',
43  "short": 'ss'
44}
45}

Note: this is only an implementation of the function param. You can do this on your own easily

intervalRenderer

Render prop function used to render a customized interval. The function provides multiple parameters that can be used to render each interval.

Paramters provided to the function has two types: context params which have the state of the item and timeline, and prop getters functions

Note : the renderProp can be a component or a function for convenience

interval context

An object contains the following properties:

property	type	description
interval	object : {startTime, endTime, labelWidth, left}	an object containing data related to the interval
intervalText	string	the string returned from labelFormat prop

Prop getters functions

Rather than applying props on the element yourself and to avoid your props being overridden (or overriding the props returned). You can pass an object to the prop getters to avoid any problems. This object will only accept some properties that our component manage so the component make sure to combine them correctly.

property	type	description
getIntervalProps	function(props={})	returns the props you should apply to the root div element.

• getIntervalProps The returned props are:

  • style: inline object style
  • onClick: event handler
  • key

  These properties can be extended using the prop argument with properties:

  • style: extra inline styles to be applied to the component
  • onClick: extra click handler added to the normal showPeriod callback

data

data passed through headerData

example

1import Timeline, {
2  TimelineHeaders,
3  SidebarHeader,
4  DateHeader
5} from 'react-calendar-timeline'
6
7<Timeline>
8  <TimelineHeaders>
9    <SidebarHeader>
10      {({ getRootProps }) => {
11        return <div {...getRootProps()}>Left</div>
12      }}
13    </SidebarHeader>
14    <DateHeader unit="primaryHeader" />
15    <DateHeader />
16    <DateHeader
17      unit="day"
18      labelFormat="MM/DD"
19      style={{ height: 50 }}
20      data={{someData: 'example'}}
21      intervalRenderer={({ getIntervalProps, intervalContext, data }) => {
22        return <div {...getIntervalProps()}>
23          {intervalContext.intervalText}
24          {data.example}
25        </div>
26      }}
27    />
28  </TimelineHeaders>
29</Timeline>

CustomHeader

Responsible for rendering the headers above calendar part of the timeline. This is the base component for DateHeader and offers more control with less features.

props

Prop	type	description
unit	second, minute, hour, day, week, month, year (default timelineUnit)	intervals
children	Function	function as a child component to render the header
headerData	any	Contextual data to be passed to the item renderer as a data prop
height	number default (30)	height of the header in pixels

unit

The unit of the header will be the unit passed though the prop and can be any unit of time from momentjs. The default value for unit is timelineUnit

Children

Function as a child component to render the header

Paramters provided to the function has three types: context params which have the state of the item and timeline, prop getters functions and helper functions.

Note : the Child function renderer can be a component or a function for convenience

({
  timelineContext: {
    timelineWidth,
    visibleTimeStart,
    visibleTimeEnd,
    canvasTimeStart,
    canvasTimeEnd
  },
  headerContext: {
    unit,
    intervals: this.state.intervals
  },
  getRootProps: this.getRootProps,
  getIntervalProps: this.getIntervalProps,
  showPeriod,
  //contextual data passed through headerData
  data,
})=> React.Node

context

An object contains context for timeline and header:

Timeline context

property	type	description
timelineWidth	number	width of timeline
visibleTimeStart	number	unix milliseconds of start visible time
visibleTimeEnd	number	unix milliseconds of end visible time
canvasTimeStart	number	unix milliseconds of start buffer time
canvasTimeEnd	number	unix milliseconds of end buffer time

Header context

property	type	description
intervals	array	an array with all intervals
unit	string	unit passed or timelineUnit

** interval: [startTime: Moment, endTime: Moment]

Prop getters functions

Rather than applying props on the element yourself and to avoid your props being overridden (or overriding the props returned). You can pass an object to the prop getters to avoid any problems. This object will only accept some properties that our component manage so the component make sure to combine them correctly.

property	type	description
getRootProps	function(props={})	returns the props you should apply to the root div element.
getIntervalProps	function(props={})	returns the props you should apply to the interval div element.

• getIntervalProps The returned props are:

  • style: inline object style
  • onClick: event handler
  • key

  These properties can be extended using the prop argument with properties:

  • style: extra inline styles to be applied to the component
  • onClick: extra click handler added to the normal showPeriod callback

helpers:

property	type	description
showPeriod	function(props={})	returns the props you should apply to the root div element.

data:

pass through the headerData prop content

example

1import Timeline, {
2  TimelineHeaders,
3  SidebarHeader,
4  DateHeader
5} from 'react-calendar-timeline'
6
7<Timeline>
8  <TimelineHeaders>
9    <SidebarHeader>
10      {({ getRootProps }) => {
11        return <div {...getRootProps()}>Left</div>
12      }}
13    </SidebarHeader>
14    <DateHeader unit="primaryHeader" />
15    <DateHeader />
16    <CustomHeader height={50} headerData={{someData: 'data'}} unit="year">
17      {({
18        headerContext: { intervals },
19        getRootProps,
20        getIntervalProps,
21        showPeriod,
22        data,
23      }) => {
24        return (
25          <div {...getRootProps()}>
26            {intervals.map(interval => {
27              const intervalStyle = {
28                lineHeight: '30px',
29                textAlign: 'center',
30                borderLeft: '1px solid black',
31                cursor: 'pointer',
32                backgroundColor: 'Turquoise',
33                color: 'white'
34              }
35              return (
36                <div
37                  onClick={() => {
38                    showPeriod(interval.startTime, interval.endTime)
39                  }}
40                  {...getIntervalProps({
41                    interval,
42                    style: intervalStyle
43                  })}
44                >
45                  <div className="sticky">
46                    {interval.startTime.format('YYYY')}
47                  </div>
48                </div>
49              )
50            })}
51          </div>
52        )
53      }}
54    </CustomHeader>
55  </TimelineHeaders>
56</Timeline>

FAQ

My timeline is unstyled

You need to include the Timeline.css file, either via static file reference or webpack stylesheet bundling. The file is located at lib/Timeline.css

How can I have items with different colors?

Now you can use item renderer for rendering items with different colors itemRenderer. Please refer to examples for a sandbox example

How can I add a sidebar on the right?

The library supports right sidebar.

To use it, you need to add a props to the <Timeline /> component:

1rightSidebarWidth={150}

And add rightTitle prop to the groups objects:

1{
2  id: 1,
3  title: 'group 1',
4  rightTitle: 'additional info about group 1'
5}

If you are using Custom Headers then you need to add SidebarHeader component under TimelineHeader with variant right

The timeline header doesn't fix to the top of the container when I scroll down.

you need to add sticky to the header like this example.

I'm using Babel with Rollup or Webpack 2+ and I'm getting strange bugs with click events

These module bundlers don't use the transpiled (ES5) code of this module. They load the original ES2015+ source. Thus your babel configuration needs to match ours. We recommend adding the stage-0 preset to your .babelrc to make sure everything works as intended.

If that's too experimental, then the minimum you need is to add is the transform-class-properties plugin that's in stage-2 and possibly the transform-object-rest-spread plugin from stage-3. However in this case it's easier to make sure you have at least stage-2 enabled.

See issue 51 for more details.

Alternatively you may import the transpiled version of the timeline like this:

1// import Timeline from 'react-calendar-timeline'  // ESnext version
2import Timeline from 'react-calendar-timeline/lib' // ES5 version

However doing so you lose on some of the features of webpack 2 and will potentially get a slightly larger bundle.

It doesn't work with create-react-app

It's the same issue as above. See issue 134 for details and options.

What are the zIndex values for all the elements?

This is useful when using the plugins (that you pass as children to the component). Override the CSS to change:

• Horizontal Lines: 30
• Vertical Lines: 40
• Items: 80-88 (depending on selection, dragging, etc)
• Header: 90

Behind the scenes

The timeline is built with speed, usability and extensibility in mind.

Speed: The calendar itself is actually a 3x wide scrolling canvas of the screen. All scroll events left and right happen naturally, like scrolling any website. When the timeline has scrolled enough (50% of the invisible surface on one side), we change the "position:absolute;left:{num}px;" variables of each of the visible items and scroll the canvas back. When this happens, the onBoundsChange prop is called.

This results in a visually endless scrolling canvas with optimal performance.

Extensibility and usability: While some parameters (onTimeChange, moveResizeValidator) might be hard to configure, these are design decisions to make it as extensible as possible. If you have recipes for common tasks regarding those parameters, send a PR to add them to this doc.

Note: 3x can be controlled by changing the buffer

Interaction

To interact and navigate within the timeline there are the following options for the user:

shift + mousewheel = move timeline left/right
alt + mousewheel = zoom in/out
ctrl + mousewheel = zoom in/out 10× faster
meta + mousewheel = zoom in/out 3x faster (win or cmd + mousewheel)

Plus there is a handling for pinch-in and pinch-out zoom gestures (two touch points). The pinch gesture on a trackpad (not a touch device) works in Chrome and Firefox (v55+) because these browsers map the gesture to ctrl + mousewheel.

Contribute

If you like to improve React Calendar Timeline fork the repo and get started by running the following:

1$ git clone https://github.com/namespace-ee/react-calendar-timeline.git react-calendar-timeline
2$ cd react-calendar-timeline
3$ yarn
4$ yarn start

Check http://0.0.0.0:8888/ in your browser and have fun!

Please run npm run lint before you send a pull request. npm run test runs the jest tests.

License

MIT licensed.