var container = document.getElementById("slider_here");

var mySlider = new Slydr(container, {
	"start-at": 33.33,
	snap: {
		points: 5,
		markers: true,
		type: "soft"
	},
	vertical: true,
	"no-handle": true
}).ready(function(data) {
	this.position = data.percent * 2;	// 66.66
});

// multiple sliders

var nodes = document.getElementsByClassName("slider");

for (let el of nodes) {
	new Slydr(el, {
		buttons: true,
		"key-control": "ctrl"
	}).on("button-press", data => {
		// log data
	});
}