// A test of maplibre-gl in a custom element class MapAdmin extends HTMLElement { constructor() { super(); // Create a shadow DOM this.attachShadow({ mode: "open" }); // Initial render this.render(); this._map = null; // markers shown on the map this._markers = []; } // Lifecycle: when element is added to the DOM connectedCallback() { // Initialize the map when the element is added to the DOM setTimeout(() => this._initializeMap(), 0); } disconnectedCallback() { if (this._map) { this._map.remove(); } } _initializeMap() { const centroid = JSON.parse(this.getAttribute("centroid")); const organization_id = this.getAttribute("organization-id"); const tegola = this.getAttribute("tegola"); const xmin = parseFloat(this.getAttribute("xmin")); const ymin = parseFloat(this.getAttribute("ymin")); const xmax = parseFloat(this.getAttribute("xmax")); const ymax = parseFloat(this.getAttribute("ymax")); const bounds = [ [xmin, ymin], [xmax, ymax], ]; const mapElement = this.shadowRoot.querySelector("#map"); this._map = new maplibregl.Map({ center: centroid.coordinates, container: mapElement, style: "https://tiles.stadiamaps.com/styles/alidade_smooth.json", // Style URL; see our documentation for more options }).fitBounds(bounds, { padding: { top: 10, bottom: 10, left: 10, right: 10 }, }); this._map.on("load", () => { this.dispatchEvent(new CustomEvent("load"), { bubbles: true, composed: true, // Allows event to cross shadow DOM boundary detail: { map: this, }, }); }); } // Initial render of component render() { this.shadowRoot.innerHTML = `