Select points by changing opacity of points in Highcharts

search.js

let searchInput = document.getElementById('search');
searchInput.oninput = function(event) {
    currentSearch = this.value;
    chart.series.forEach(serie => {
        serie.points.forEach(point => {
            point.update({ color: Highcharts.theme.colors[point.colorIndex] }, false);
        });
    });
    chart.redraw();

    if (currentSearch !== '') {
        chart.series.forEach(serie => {
            serie.points.forEach(point => {
                if (point.name.includes(currentSearch)) {
                    // We don't need too select any point here because we only fade out other points.
                    // point.select(true, true);
                } else {
                    point.update({ color: Highcharts.theme.colors[point.colorIndex] + '11' }, false);
                }
            });
        });
    }
};