Highcharts Showing Uncaught TypeError: Cannot read properties of undefined (reading 'chart') - highcharts

Question

I've had this HighCharts spider chart working fine for a while now, but we upgraded to the latest HighCharts code and I noticed that the mouseovers are no longer working. My PHP code looks like this:
// Create a new Highchart
$chart = new Highchart();
$chart->includeExtraScripts();
$chart->chart->renderTo = "control_maturity_spider_chart";
$chart->chart->polar = true;
$chart->chart->type = "line";
$chart->chart->width = 1000;
$chart->chart->height = 1000;
$chart->title->text = "Current vs Desired Maturity by Control Family";
$chart->title->x = -80;
$chart->pane->size = "80%";
$chart->xAxis->categories = $categories;
$chart->xAxis->tickmarkPlacement = "on";
$chart->xAxis->lineWidth = 0;
$chart->yAxis->gridLineInterpolation = "polygon";
$chart->yAxis->lineWidth = 0;
$chart->yAxis->min = 0;
$chart->yAxis->max = 5;
$chart->yAxis->tickInterval = 1;
$chart->tooltip->shared = true;
$chart->tooltip->pointFormat = '<span style="color:{series.color}">{series.name}: <b>{point.y}</b><br/>';
$chart->legend->align = "center";
$chart->legend->verticalAlign = "top";
$chart->legend->layout = "vertical";
// Draw the Current Maturity series
$chart->series[0]->name = $escaper->escapeHtml($lang['CurrentControlMaturity']);
$chart->series[0]->data = empty($categories_current_maturity_average) ? [] : $categories_current_maturity_average;
$chart->series[0]->pointPlacement = "on";
// Draw the Desired Maturity series
$chart->series[1]->name = $escaper->escapeHtml($lang['DesiredControlMaturity']);
$chart->series[1]->data = empty($categories_desired_maturity_average) ? [] : $categories_desired_maturity_average;
$chart->series[1]->pointPlacement = "on";
$chart->credits->enabled = false;
echo "<figure class=\"highcharts-figure\">\n";
echo " <div id=\"control_maturity_spider_chart\"></div>\n";
echo "</figure>\n";
echo "<script type=\"text/javascript\">";
echo $chart->render("control_maturity_spider_chart");
echo "</script>\n";
The actual chart renders just fine, but if you mouse over it, you just get this message in the javascript console over and over again:
HighCharts Error Message
If we comment out these two lines of code, the mouseover works:
$chart->tooltip->shared = true;
$chart->tooltip->pointFormat = '<span style="color:{series.color}">{series.name}: <b>{point.y}</b><br/>';
Any thoughts on what we are doing wrong here, or what changed, would be greatly appreciated. Thank you.

Answer 1

this is the bug which you can track here: https://github.com/highcharts/highcharts/issues/17472
As a temporary workaround, add the following wrap function to your code:
(function(H) {
const isObject = H.isObject;
H.Pointer.prototype.findNearestKDPoint = function(series, shared, e) {
var chart = this.chart;
var hoverPoint = chart.hoverPoint;
var tooltip = chart.tooltip;
if (hoverPoint &&
tooltip &&
tooltip.isStickyOnContact()) {
return hoverPoint;
}
var closest;
/** #private */
function sort(p1, p2) {
var isCloserX = p1.distX - p2.distX,
isCloser = p1.dist - p2.dist,
isAbove = ((p2.series.group && p2.series.group.zIndex) -
(p1.series.group && p1.series.group.zIndex));
var result;
// We have two points which are not in the same place on xAxis
// and shared tooltip:
if (isCloserX !== 0 && shared) { // #5721
result = isCloserX;
// Points are not exactly in the same place on x/yAxis:
} else if (isCloser !== 0) {
result = isCloser;
// The same xAxis and yAxis position, sort by z-index:
} else if (isAbove !== 0) {
result = isAbove;
// The same zIndex, sort by array index:
} else {
result =
p1.series.index > p2.series.index ?
-1 :
1;
}
return result;
}
series.forEach(function(s) {
var noSharedTooltip = s.noSharedTooltip && shared,
compareX = (!noSharedTooltip &&
s.options.findNearestPointBy.indexOf('y') < 0),
point = s.searchPoint.call(s.polar, e, compareX);
if ( // Check that we actually found a point on the series.
isObject(point, true) && point.series &&
// Use the new point if it is closer.
(!isObject(closest, true) ||
(sort(closest, point) > 0))) {
closest = point;
}
});
return closest;
};
}(Highcharts))
Demo:
https://jsfiddle.net/BlackLabel/8b2mhqf0/