leaflet显示固定介绍框

// control that shows state info on hover
var info = L.control();

info.onAdd = function (map) {
	this._div = L.DomUtil.create('div', 'info');
	this.update();
	return this._div;
};

info.update = function (props) {
	this._div.innerHTML = '<h4>US Population Density</h4>' +  (props ?
		'<b>' + props.name + '</b><br />' + props.density + ' people / mi<sup>2</sup>'
		: 'Hover over a state');
};

info.addTo(map);

转载自：https://blog.csdn.net/dyxcome/article/details/88959382