Custom Overlay - Define draw method

custom-overlay-draw.js

function positionOverlayByDimensions(projectedLatLng) {
    var offsetHeight = this.el.offsetHeight,
        offsetWidth = this.el.offsetWidth;

    this.el.style.top = projectedLatLng.y - offsetHeight + 'px';
    this.el.style.left = projectedLatLng.x - Math.floor(offsetWidth / 2) + 'px';
}

BaseOverlay.prototype.draw = function () {
    var projection = this.getProjection(),
        projectedLatLng = projection.fromLatLngToDivPixel(this.point);

    positionOverlayByDimensions.call(this, projectedLatLng);
};