Can OpenLayers library be integrated into Vue CLI 3?

I am currently trying to integrate Openlayers with vue-cli-3, but it seems like I am missing something in the process.

Initially, I installed Vue CLI using the following command:

npm install @vue/cli -g

Next, I added additional dependencies, specifically the OpenLayers library:

npm install ol.

However, I am facing issues when it comes to including and registering these dependencies globally in my main.js file.

When I try to import files in my App.vue like this, I encounter two errors:

[Vue warn]: Error in nextTick: "ReferenceError: ol is not defined"

ReferenceError: ol is not defined

import 'ol/ol.css';
import { Map, View } from 'ol';
import TileLayer from 'ol/layer/Tile';
import OSM from 'ol/source/OSM';

export default {

  data() {
    return {
      testing: 'SomeTests',
    }
  },
  mounted() {
    this.$nextTick(function () {
      initMap();
    })
  }
}
function initMap() {
  var myMap = new ol.Map({
    layers: [
      new ol.layer.Tile({
        source: new ol.source.OSM()
      })
    ],
    target: 'map',
    view: new ol.View({
      center: [0, 0],
      zoom: 2,
    })
  })
};

Interestingly, when I include script and link tags directly in my index.html file, the code mentioned above works without any issues.

<head>
  <link rel="stylesheet" href="https://openlayers.org/en/v5.2.0/css/ol.css" type="text/css">
  <script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.2.0/build/ol.js"></script>
  <title>ol-basic</title>
</head>

My question revolves around whether it's possible to import elements as recommended on the OpenLayers page by utilizing modules, and if there is a way to globally register the OpenLayers package in my main.js file.

Answer №1

After some further deliberation, I have successfully resolved the issue at hand. Below is a functional example that may be of assistance to others.

// Including all components from ol library
import 'ol/ol.css';
import Map from 'ol/Map';
import View from 'ol/View';
import TileLayer from 'ol/layer/Tile';
import XYZ from 'ol/source/XYZ';

function initializeMap() {
  new Map({
    target: 'map',
    layers: [
      new TileLayer({
        source: new XYZ({
          url: 'https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png'
        })
      })
    ],
    view: new View({
      center: [0, 0],
      zoom: 2
    })
  }

Answer №2

The absence of importing ol is causing undefined errors. To resolve this issue, consider the following:

// Import all modules from ol
import * as ol from 'ol';

// Utilize the OSM and TileLayer API provided by OpenLayers.
function initializeMap() {
  var myMap = new ol.Map({
    layers: [
      new TileLayer({
        source: new OSM()
      })
    ],
    target: 'map',
    view: new ol.View({
      center: [0, 0],
      zoom: 2,
    })
  })
}

I tested this solution in a Vue project and confirmed that the function executes smoothly without any reference errors.

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