'icon-color': ["case",["boolean", ["feature-state", "clicked"], false],
                                "inactive",
                                "active"
                            ],

map.updateImage(`point1`, map.loadImage('/img/pin_active.png'))
map.updateImage(`point1`, 'active')) //with the image being loaded beforehand as 'active'
map.updateImage(`point1`, map.loadImage('/img/pin_active.png', function(error, image) {
                        if (error) throw error;
                        map.addImage(point1, image);
                    }))