Question 336038 in Reactjs Question posted in
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Reactjs – useMap() always says { current: undefined }

I am using react-map-gl for a project. The map itself renders but i can’t use useMap(). It always logs { current: undefined }. Has anyone a solution?

My layout.tsx contains:

import { MapProvider } from "react-map-gl";
....
<div className="flex h-screen">
  <MapProvider>
    <div>
      {children}
    </div>

    <InternalMap />
  </MapProvider>
</div>

);

InternalMap.tsx looks like:

  import MapGL, { ScaleControl } from "react-map-gl";

  <MapGL
      ....
   >
    ....some more stuff

The children page looks like:

import { useMap } from "react-map-gl";

const { default: map } = useMap();
console.log(map, useMap())
Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I messed up some imports in my monorepo and tried to imported react-map-gl from a wrong place with a version missmatch


  2. 0

    you have to use An API access token is required to use Mapbox GL.

    import React, { Component } from "react";
import ReactDOM from "react-dom";
import ReactMapboxGl, { GeoJSONLayer } from "react-mapbox-gl";
import * as turf from "@turf/turf";
import geojsonStyles from "./geojsonStyles";
import "@mapbox/mapbox-gl-draw/dist/mapbox-gl-draw.css";

import "./styles.css";

const Map = ReactMapboxGl({
  accessToken:"enter your access token"
});

class App extends Component {
  onDrawCreate = ({ features }) => {
    console.log(features);
  };

  onDrawUpdate = ({ features }) => {
    console.log({ features });
  };

  render() {
    const centerPoint = [-73.975547, 40.691785];

    var radius = 0.1;

    var options = {
      steps: 50,
      units: "miles",
      properties: {
        text: "test"
      }
    };

    const firstCircle = turf.circle(centerPoint, radius, options);

    const secondCircle = turf.circle(centerPoint, radius * 2, options);

    const thirdCircle = turf.circle(centerPoint, radius * 4, options);

    return (
      <div className="App">
        <Map
          style="mapbox://styles/mapbox/streets-v9" // eslint-disable-line
          containerStyle={{
            height: "100vh",
            width: "100vw"
          }}
          zoom={[14]}
          center={[-73.975547, 40.691785]}
        >
          <GeoJSONLayer {...geojsonStyles} data={firstCircle} />
          <GeoJSONLayer {...geojsonStyles} data={secondCircle} />
          <GeoJSONLayer {...geojsonStyles} data={thirdCircle} />
        </Map>
      </div>
    );
  }
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

    CodeSandbox URL: https://codesandbox.io/p/sandbox/react-mapbox-gl-turf-mueyi?file=%2Fsrc%2Findex.js%3A1%2C1-65%2C1

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