You can change the content of the html info window.
You can set HTML strings or HTML element.
<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 button = document.createElement("button");
button.innerText = "Click me!";
button.addEventListener("click", function() {
var html = "<img src='./House-icon.png' width='64' height='64' >" +
"<br>" +
"Ta-da!";
htmlInfoWindow.setContent(html);
});
htmlInfoWindow.setContent(button);
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);
});
});