Method _loadMapLibreAsync

modules/core/Map3dSystem.js:258–292

* _loadMapLibreAsync * Load the MapLibre JS and CSS files into the document head * @return {Promise} Promise resolved when both files have been loaded

()

   * @return {Promise} Promise resolved when both files have been loaded
   */
  _loadMapLibreAsync() {
    if (this._loadPromise) return this._loadPromise;

    return this._loadPromise = new Promise((resolve, reject) => {
      const assets = this.context.systems.assets;

      let count = 0;
      const loaded = () => {
        if (++count === 2) resolve();
      };

      const $head = d3_select('head');

      $head.selectAll('#rapideditor-maplibre-css')
        .data([0])
        .enter()
        .append('link')
        .attr('id', 'rapideditor-maplibre-css')
        .attr('rel', 'stylesheet')
        .attr('crossorigin', 'anonymous')
        .attr('href', assets.getAssetURL('maplibre_css'))
        .on('load', loaded)
        .on('error', reject);

      $head.selectAll('#rapideditor-maplibre-js')
        .data([0])
        .enter()
        .append('script')
        .attr('id', 'rapideditor-maplibre-js')
        .attr('crossorigin', 'anonymous')
        .attr('src', assets.getAssetURL('maplibre_js'))
        .on('load', loaded)
        .on('error', reject);
    });
  }


  /**