[@types/chart.js] Add missing getElementsAtXAxis method. Closes #23159 (#43697)

types/chart.js/chart.js-tests.ts

@@ -454,3 +454,7 @@ const timeLabelsChartData: Chart.ChartData = {
         moment(), moment(), moment(),
     ],
 };
+
+const event = new MouseEvent('click');
+chart.getElementsAtEvent(event);
+chart.getElementsAtXAxis(event);

types/chart.js/index.d.ts

@@ -49,6 +49,7 @@ declare class Chart {
     generateLegend: () => {};
     getElementAtEvent: (e: any) => [{}];
     getElementsAtEvent: (e: any) => Array<{}>;
+    getElementsAtXAxis: (e: any) => Array<{}>;
     getDatasetAtEvent: (e: any) => Array<{}>;
     getDatasetMeta: (index: number) => Meta;
     ctx: CanvasRenderingContext2D | null;