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index.js
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index.js
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// [START maps_overlay_popup]
let map, popup, Popup;
/** Initializes the map and the custom popup. */
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: { lat: -33.9, lng: 151.1 },
zoom: 10,
});
/**
* A customized popup on the map.
*/
class Popup extends google.maps.OverlayView {
constructor(position, content) {
super();
this.position = position;
content.classList.add("popup-bubble");
// This zero-height div is positioned at the bottom of the bubble.
const bubbleAnchor = document.createElement("div");
bubbleAnchor.classList.add("popup-bubble-anchor");
bubbleAnchor.appendChild(content);
// This zero-height div is positioned at the bottom of the tip.
this.containerDiv = document.createElement("div");
this.containerDiv.classList.add("popup-container");
this.containerDiv.appendChild(bubbleAnchor);
// Optionally stop clicks, etc., from bubbling up to the map.
Popup.preventMapHitsAndGesturesFrom(this.containerDiv);
}
/** Called when the popup is added to the map. */
onAdd() {
this.getPanes().floatPane.appendChild(this.containerDiv);
}
/** Called when the popup is removed from the map. */
onRemove() {
if (this.containerDiv.parentElement) {
this.containerDiv.parentElement.removeChild(this.containerDiv);
}
}
/** Called each frame when the popup needs to draw itself. */
draw() {
const divPosition = this.getProjection().fromLatLngToDivPixel(
this.position
);
// Hide the popup when it is far out of view.
const display =
Math.abs(divPosition.x) < 4000 && Math.abs(divPosition.y) < 4000
? "block"
: "none";
if (display === "block") {
this.containerDiv.style.left = divPosition.x + "px";
this.containerDiv.style.top = divPosition.y + "px";
}
if (this.containerDiv.style.display !== display) {
this.containerDiv.style.display = display;
}
}
}
popup = new Popup(
new google.maps.LatLng(-33.866, 151.196),
document.getElementById("content")
);
popup.setMap(map);
}
// [END maps_overlay_popup]