[Chartjs]-How can I hide tick marks on Chart.js?

It’s easier to do this by clearing out the tick marks after they have been drawn. You can do this by extending the chart.

Preview

Script

Chart.types.Line.extend({
    name: "LineAlt",
    initialize: function () {
        Chart.types.Line.prototype.initialize.apply(this, arguments);

        var scale = this.scale;
        var originalDraw = scale.draw;
        scale.draw = function () {
            originalDraw.apply(this, arguments);
            ctx.clearRect(scale.calculateX(0), scale.endPoint, scale.width, 5);
            ctx.clearRect(scale.calculateX(0), scale.endPoint + 1, -5, -scale.height);
        }
    }
});

and then

...
new Chart(ctx).LineAlt(data);

Fiddle – http://jsfiddle.net/m9k5goaL/