Customizable plug-and-play map of Denmark for visual presentation 🗺️
✨ Demo ✨
npm install react-denmark-map
yarn add react-denmark-map
Examples use the Municipalities
component, although the props are the same for every component. See "API" for all available components.
import { Municipalities } from 'react-denmark-map'
const App = () => {
return <Municipalities />
}
The customizeAreas
prop is invoked for each area and applies a className and/or style object.
import { Municipalities } from 'react-denmark-map'
const App = () => {
const customizeMunicipalities = (municipality) => {
if (municipality.name === 'københavn') {
return {
className: 'københavn',
style: {
fill: 'red'
}
}
}
}
return <Municipalities customizeAreas={customizeMunicipalities} />
}
Below is an example of how you can conditionally style each area with external data. Here, id
is the name of the municipality and population
is data about the area. We can make municipalities with a population less than 40.000 people a light blue color and municipalities with a higher population a darker blue color.
import { Municipalities } from 'react-denmark-map'
const data = [
{
id: 'assens',
population: 40972
}
// ...
]
const App = () => {
const customizeMunicipalities = (municipality) => {
const result = data.find((item) => item.id === municipality.name)
if (!result) return
if (result.population < 40000) {
return {
style: {
fill: 'skyblue'
}
}
}
return {
style: {
fill: 'royalblue'
}
}
}
return <Municipalities customizeAreas={customizeMunicipalities} />
}
Instead of municipalities, these areas could also be each region or island, depending on the component used. See "API" for full reference.
customTooltip
is a prop that takes a function and returns a JSX element. The tooltip is displayed when hovering an area.
import { Municipalities } from 'react-denmark-map'
const CustomTooltip = ({ area }) => {
return (
<div className="tooltip">
<p>Name: {area.displayName}</p>
<p>Municipality code: {area.code}</p>
</div>
)
}
const App = () => <Municipalities customTooltip={CustomTooltip} />
You can easily display external data about the area on the tooltip. In this example, id
is the name of the municipality and population
is data about the area, where we want to display data about the population of the area in the tooltip.
import { Municipalities } from 'react-denmark-map'
const data = [
{
id: 'assens',
population: 40972
}
// ...
]
const CustomTooltip = ({ area }) => {
const result = data.find((item) => item.id === area.name)
return (
<div>
<p>{area.displayName}</p>
<p>Population: {result?.population ? result.population : 'N/A'}</p>
</div>
)
}
const App = () => <Municipalities customTooltip={CustomTooltip} />
The area
prop of the customTooltip
component contains several fields that can be used to identify the correct area. See "API" for full reference.
Disable the tooltip by passing showTooltip={false}
as a prop.
onClick
event handlerAn event handler that is called when an area is clicked.
import { Municipalities } from 'react-denmark-map'
const App = () => {
return (
<Municipalities
onClick={(municipality) => console.log(`Clicked: ${municipality.displayName}`)}
/>
)
}
onHover
event handlerAn event handler that is called when an area is hovered on.
import { Municipalities } from 'react-denmark-map'
const App = () => {
return (
<Municipalities
onHover={(municipality) => console.log(`Hovered: ${municipality.displayName}`)}
/>
)
}
onMouseEnter
and onMouseLeave
event handlersEvent handlers that are called when areas are entered and left by the cursor, respectively. onHover
is the same as onMouseEnter
.
import { Municipalities } from 'react-denmark-map'
const App = () => {
return (
<Municipalities
onMouseEnter={(municipality) => console.log(`Mouse entered: ${municipality.displayName}`)}
onMouseLeave={(municipality) => console.log(`Mouse left: ${municipality.displayName}`)}
/>
)
}
The customZoomControls
prop allows you to pass your own zoom controls.
import { Municipalities } from 'react-denmark-map'
const CustomZoomControls = ({ onZoomIn, onZoomOut }) => (
<div style={{ display: 'flex', flexDirection: 'column' }}>
<button onClick={onZoomIn}>+</button>
<button onClick={onZoomOut}>–</button>
</div>
)
const App = () => <Municipalities customZoomControls={CustomZoomControls} />
Pass the prop zoomable={false}
to disable zooming (and thus not render zoom controls).
It's strongly recommended that you wrap the map in an element and position that according to your needs. Applying a max width and a margin will center the map and preserve it's dimensions across screen sizes.
<div style={{ maxWidth: '600px', margin: '0 auto' }}>
<Municipalities />
</div>
The exported components also support a number of different ways of styling the map.
import { Municipalities } from 'react-denmark-map'
const App = () => {
return <Municipalities className="denmark" style={{ marginTop: '20px' }} color="lightgray" />
}
className
is a string which is applied directly to the SVG element.style
is an object of CSS properties which is applied directly to the SVG element.color
is the default color applied to each area of the map.clickable
specifies whether cursor: pointer
should be applied when hovering. True if onClick
is passed.hoverable
specifies whether hover styles should be applied when hovering. True by default.Alternatively, you can apply styles via CSS selectors. Some tags are available through their HTML id
attribute.
react-denmark-map-svg
is the svg
element which contains the path of each area.react-denmark-map
is the top-most figure
element and the parent of svg
.react-denmark-map-tooltip
is the default tooltip div
element.react-denmark-map-zoom-controls
is the parent div
element to the two buttons constituting the default zoom controls.React Denmark Map is written in Typescript.
You may also want to apply types to function arguments i.e. when writing the function to be given to the customizeAreas
prop. In that case, React Denmark Map exports the type used as an argument as *Type
, e.g. for the Municipalities
component.
import { Municipalities, MunicipalityType } from 'react-denmark-map'
const CustomTooltip = ({ area }: { area: MunicipalityType }) => (
// ...
)
const App = () => {
const customizeMunicipalities = (municipality: MunicipalityType) => {
// ...
}
return <Municipalities customizeAreas={customizeMunicipalities} />
}
All props that accept a function as an argument have the same type in that component, so the same type can be applied to the parameter used in onClick
, onHover
, as well as for the area
prop in customTooltip
.
Different components have different types for the area parameter. The Regions
component, for example, exports a RegionsType
that can be used in the same way as shown above. See "API - Types" for the full reference of area types.
If you want to make sure that each version of the map rerenders as few times as possible to improve performance, make sure to memoize the objects and functions that you pass as props with useMemo
and useCallback
. Each component is only shallowly memoized. Below is an example of memoizing the customizeAreas
and style
props.
const App = () => {
const style = useMemo(() => ({ color: 'red' }), [])
const customizeAreas = useCallback(() => {
return {
style: {
fill: 'red'
}
}
}, [])
return <Municipalities customizeAreas={customizeAreas} style={style} />
}
React Denmark Map exports several components, each being a map of Denmark with different areas that all support the same props as those shown above:
Component | Description |
---|---|
Municipalities |
All 98 municipalities of Denmark. |
Constituencies |
The 10 constituencies of Denmark. |
Regions |
The five regions of Denmark. |
Islands |
Zealand, Fyn and Jutland (Sjælland, Fyn, Jylland). |
Denmark |
A map of Denmark with no subsequent areas. |
Prop | Description | Type | Default |
---|---|---|---|
className |
The className applied directly to the <svg> element. |
string | "" |
style |
The style object applied directly to the <svg> element. |
CSSProperties* | {} |
viewbox |
The viewbox applied directly to the <svg> element. |
{ top?: number, left?: number, width?: number, height?: number } | { top: 0, left: 0, width: 1000, height: 1215 } |
color |
The default color of each municipality. | CSSProperties["fill"] | #ccc |
clickable |
Whether the clickable styles should be applied to the <path> element (the area). |
boolean | false |
hoverable |
Whether the hoverable styles should be applied to the <path> element (the area). |
boolean | true |
showTooltip |
Whether to render the tooltip. | boolean | true |
zoomable |
Whether you should be able to zoom on the map. | boolean | true |
customZoomControls |
A functional component that returns custom zoom controls. Rendered top-right. | (props: { onZoomIn(): void; onZoomOut(): void }) => ReactNode | |
customTooltip |
A functional component that returns a custom tooltip. | (props: { area: AreaType*** }) => ReactNode | |
customizeAreas |
A function that is invoked for every area and returns an object to style the area. | (area: AreaType) => { className?: string, style? CSSProperties } | undefined | |
filterAreas |
A function that is invoked for every area that avoids rendering the area if the function returns false. | (area: AreaType) => boolean | |
onClick |
A function that is invoked when an area is clicked. | (area: AreaType) => void | |
onHover |
A function that is invoked when an area is hovered. | (area: AreaType) => void | |
onMouseEnter |
A function that is invoked when the mouse enters an area. | (area: AreaType) => void | |
onMouseLeave |
A function that is invoked when the mouse leaves an area. | (area: AreaType) => void |
*: CSSProperties refers to the object provided to the style attribute in React. Fields in this object are denoted as CSSProperties["property"].
**: It will be out of the viewbox when first rendered so you need to manually set the viewbox to render it. See example for use case.
***: AreaType is one of the five types corresponding to the component used (see "Types" below).
Each area has at least the first 5 properties and potentially more.
type AreaType = {
id: string // the name of the area with substitutes for Danish letters (e.g. 'fanoe')
name: string // the name of the area with Danish letters (e.g. 'fanø')
asciiName: string // same as 'id'
displayName: string // the local name of the area capitalized (e.g. 'Høje Taastrup')
d: string // the path of the area applied to the <path> element
code: string // the municipality or region code (e.g. 482 or 1083)
enTerm: string // the term used to describe the area in English (e.g. jyllland = jutland)
region: RegionType // the region that a municipality is located in (e.g. fanø -> syddanmark)
}
The types corresponding to each component are:
Component | Name of exported type | Included in type |
---|---|---|
Municipalities |
MunicipalityType | { id, name, asciiName, displayName, d, code, region } |
Constituencies * |
ConstituencyType | { id, name, asciiName, displayName, d } |
Regions |
RegionType | { id, name, asciiName, displayName, d, code } |
Islands |
IslandType | { id, name, asciiName, displayName, d, enTerm } |
Denmark |
DenmarkType | { id, name, asciiName, displayName, d, enTerm } |
*: When filtering using any of the strings in the ConstituencyType be aware that the constituencies (danish: "storkredse"), e.g. "sydjyllands storkreds", have the word "storkreds" omitted in the properties id
, name
and asciiName
. Thus, "sydjyllands storkreds" is just "sydjyllands" and so on.
Using the Denmark
component means that there's only one path element, so DenmarkType describes just that one area.
All entries for the areas can be found under 'packages/core/src/components/[area]/data.ts'.
React Denmark Map is licensed under the MIT license.
Contributions are really appreciated! Read CONTRIBUTING.md for more information.