Create a draggable Marker | Mapbox GL JS

Drag the Marker to a new location on a map and populate its coordinates in a display.

If you would like to customize your markers with images or other HTML functionality, see our Custom Markers tutorial and the related video tutorial.

JavaScript

React

JavaScript

React


<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Create a draggable Marker</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.8.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.8.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
    .coordinates {
        background: rgba(0, 0, 0, 0.5);
        color: #fff;
        position: absolute;
        bottom: 40px;
        left: 10px;
        padding: 5px 10px;
        margin: 0;
        font-size: 11px;
        line-height: 18px;
        border-radius: 3px;
        display: none;
    }
</style>

<div id="map"></div>
<pre id="coordinates" class="coordinates"></pre>

<script>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
    const coordinates = document.getElementById('coordinates');
    const map = new mapboxgl.Map({
        container: 'map',
        // Choose from Mapbox's core styles, or make your own style with Mapbox Studio
        style: 'mapbox://styles/mapbox/streets-v12',
        center: [0, 0],
        zoom: 2
    });

    const marker = new mapboxgl.Marker({
        draggable: true
    })
        .setLngLat([0, 0])
        .addTo(map);

    function onDragEnd() {
        const lngLat = marker.getLngLat();
        coordinates.style.display = 'block';
        coordinates.innerHTML = `Longitude: ${lngLat.lng}<br />Latitude: ${lngLat.lat}`;
    }

    marker.on('dragend', onDragEnd);
</script>

</body>
</html>

このコードスニペットは、YOUR_MAPBOX_ACCESS_TOKENをあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。

JavaScript

React


import React, { useEffect, useRef, useState } from 'react';
import mapboxgl from 'mapbox-gl';

import 'mapbox-gl/dist/mapbox-gl.css';

const MapboxExample = () => {
  const mapContainerRef = useRef();
  const mapRef = useRef();

  const [coordinates, setCoordinates] = useState();

  useEffect(() => {
    // TO MAKE THE MAP APPEAR YOU MUST
    // ADD YOUR ACCESS TOKEN FROM
    // https://account.mapbox.com
    mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';

    mapRef.current = new mapboxgl.Map({
      container: mapContainerRef.current,
      style: 'mapbox://styles/mapbox/streets-v12',
      center: [0, 0],
      zoom: 2
    });

    const marker = new mapboxgl.Marker({
      draggable: true
    })
      .setLngLat([0, 0])
      .addTo(mapRef.current);

    function onDragEnd() {
      const lngLat = marker.getLngLat();
      setCoordinates([`Longitude: ${lngLat.lng}`, `Latitude: ${lngLat.lat}`]);
    }

    marker.on('dragend', onDragEnd);
    return () => {
      mapRef.current.remove();
    };
  }, []);

  return (
    <>
      <div ref={mapContainerRef} id="map" style={{ height: '100%' }}></div>
      <div
        style={{
          background: 'rgba(0, 0, 0, 0.5)',
          color: '#fff',
          position: 'absolute',
          bottom: '40px',
          left: '10px',
          padding: '5px 10px',
          margin: 0,
          fontFamily: 'monospace',
          fontWeight: 'bold',
          fontSize: '11px',
          lineHeight: '18px',
          borderRadius: '3px',
          display: coordinates ? 'block' : 'none'
        }}
      >
        {coordinates &&
          coordinates.map((coord) => (
            <p style={{ marginBottom: 0 }}>{coord}</p>
          ))}
      </div>
    </>
  );
};

export default MapboxExample;

このコードスニペットは、YOUR_MAPBOX_ACCESS_TOKENをあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。

追加の開発者リソース

このexampleは役に立ちましたか？