how to default checked showTrackPoint and showTrackLine

[donvan]

the fn _createCheckbox code , inputEle.setAttribute('checked', 'checked') is not work at all.

[gkieninger]

For me this was working

const trackplaybackControl = L.trackplaybackcontrol(trackplayback);
trackplaybackControl.addTo(map);
$(".trackplayback-input").prop('checked', true);