Leaflet.SubpixelPosition demo

Without subpixel positioning:

With subpixel positioning:

Sample code:

function demoAnimate (setPos) {
    function step(timestamp) {
        var radius = 20;
        setPos([
            Math.cos(timestamp / 5000) * radius,
            Math.sin(timestamp / 5000) * radius
        ]);            
        requestAnimationFrame(step);
    }
    requestAnimationFrame(step);
}

demoAnimate(function (latlng) {
    noSubpixMarker.setLatLng(latlng)
    subpixMarker.setLatLngPrecise(latlng)
})