Chartjs-To remove error message when user clicked on legend label

why don’t you use chart onclick event and canvas onclick together. canvas onclick has filter function, chart onclick has show modal.

    onClick: function(c,i) {
            e = i[0];
            var x_value = this.data.labels[e._index];
            var y_value = this.data.datasets[0].data[e._index];
            var ID = x_value;
            var Tip =1;