CODEWITHSUNDEEP
javascriptreactjsleafletreact-leaflet
muszynov
muszynov

Reputation: 329

Multiple custom markers import in Leaflet

I use Leaflet to present some points on map. However, I want to place different marker depending on some parameters. The question is: is it possible to import in React whole directory of my custom markers (.png files)? Currently it looks like this: 

import icon from 'leaflet/dist/images/marker-icon.png';

And then

render() {
  const position = [54.40, 18.60];
  let DefaultIcon = L.icon({
  iconUrl: icon,
  shadowUrl: iconShadow,
  iconSize: [24, 36],
  iconAnchor: [12, 36],
  popupAnchor: [0, -25]
});

So for one marker there's one import at the top.

Say I want to import few icons, so do I have to import every single .png file separately at the top of my react component? Or is there a way to just import a directory and then place only path to appropriate icon file?

Upvotes: 0

Views: 2494

Answers (2)

Rex Lewis
Rex Lewis

Reputation: 11

You can do this kinda thing:

  if ( feature.properties.name === "NONE") {
    var shadow = "Project/data/images/NONE.png";
  } else {
    var shadow = "Project/data/images/shadow.png";
  }

  var flag = L.icon({
    shadowUrl: shadow,
    iconUrl: `Project/data/images/${feature.properties.name }.png`,

Upvotes: 0

Vadim Gremyachev
Vadim Gremyachev

Reputation: 59338

For that matter a webpack feature called dynamic require could be utilized, for example with expression:

const icon = L.icon({
     iconUrl: require(`../public/custom-icons/${item.iconName}`),
});

icons images dynamically get loaded from /public/custom-icons/ folder and included in bundle

Example

const MapExample = () => {
  const data = [
    { position: { lat: -33.8478796, lng: 150.7918932 }, title: "Sydney", "iconName" : "leaf-red.png" },
    { position: { lat: -31.954654, lng: 115.8399823 }, title: "Perth ", "iconName" : "leaf-green.png" }
  ];

  return (
    <Map center={{ lat: -24.9929159, lng: 115.2297986 }} zoom={4}>
      <TileLayer
        url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
        attribution='&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
      />
      {data.map((item, idx) => {
        const icon = L.icon({
          iconUrl: require(`../public/custom-icons/${item.iconName}`),
          iconSize: [24, 36],
          iconAnchor: [12, 36],
          popupAnchor: [0, -25]
        });

        return (
          <Marker key={idx} icon={icon} position={item.position}>
            <Popup>{item.title}</Popup>
          </Marker>
        );
      })}
    </Map>
  );
};

Here is a demo

Upvotes: 1

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