Close the htmlInfoWindow.
<div id="map_canvas"></div>
var div = document.getElementById("map_canvas");
var map = plugin.google.maps.Map.getMap(div);
map.one(plugin.google.maps.event.MAP_READY, function() {
var htmlInfoWindow = new plugin.google.maps.HtmlInfoWindow();
var infoDiv = document.createElement("div");
infoDiv.innerHTML = "Click the below button.<br>";
var button = document.createElement("button");
button.innerText = "Close this infoWindow";
button.addEventListener("click", function() {
htmlInfoWindow.close();
});
infoDiv.appendChild(button);
htmlInfoWindow.setContent(infoDiv);
map.addMarker({
position: {lat: 0, lng: 0}
}, function(marker) {
marker.on(plugin.google.maps.event.MARKER_CLICK, function() {
htmlInfoWindow.open(marker);
});
marker.trigger(plugin.google.maps.event.MARKER_CLICK);
});
});