Use isNullOrUndef helper for point value checks

Author: marisst

src/core/core.interaction.js

@@ -1,7 +1,7 @@
 import {_lookupByKey, _rlookupByKey} from '../helpers/helpers.collection.js';
 import {getRelativePosition} from '../helpers/helpers.dom.js';
 import {_angleBetween, getAngleFromPoint} from '../helpers/helpers.math.js';
-import {_isPointInArea} from '../helpers/index.js';
+import {_isPointInArea, isNullOrUndef} from '../helpers/index.js';
 
 /**
  * @typedef { import('./core.controller.js').default } Chart
@@ -36,13 +36,13 @@ function binarySearch(metaset, axis, value, intersect) {
           .slice(0, result.lo + 1)
           .reverse()
           .findIndex(
-            point => point[vScale.axis] || point[vScale.axis] === 0));
+            point => !isNullOrUndef(point[vScale.axis])));
         result.lo -= Math.max(0, distanceToDefinedLo);
 
         const distanceToDefinedHi = (_parsed
           .slice(result.hi - 1)
           .findIndex(
-            point => point[vScale.axis] || point[vScale.axis] === 0));
+            point => !isNullOrUndef(point[vScale.axis])));
         result.hi += Math.max(0, distanceToDefinedHi);
       }
       return result;

src/helpers/helpers.extras.ts

@@ -2,6 +2,7 @@ import type {ChartMeta, PointElement} from '../types/index.js';
 
 import {_limitValue} from './helpers.math.js';
 import {_lookupByKey} from './helpers.collection.js';
+import {isNullOrUndef} from './helpers.core.js';
 
 export function fontString(pixelSize: number, fontStyle: string, fontFamily: string) {
   return fontStyle + ' ' + pixelSize + 'px ' + fontFamily;
@@ -107,7 +108,7 @@ export function _getStartAndCountOfVisiblePoints(meta: ChartMeta<'line' | 'scatt
           .slice(0, start + 1)
           .reverse()
           .findIndex(
-            point => point[vScale.axis] || point[vScale.axis] === 0));
+            point => !isNullOrUndef(point[vScale.axis])));
         start -= Math.max(0, distanceToDefinedLo);
       }
       start = _limitValue(start, 0, pointCount - 1);
@@ -122,7 +123,7 @@ export function _getStartAndCountOfVisiblePoints(meta: ChartMeta<'line' | 'scatt
         const distanceToDefinedHi = (_parsed
           .slice(end - 1)
           .findIndex(
-            point => point[vScale.axis] || point[vScale.axis] === 0));
+            point => !isNullOrUndef(point[vScale.axis])));
         end += Math.max(0, distanceToDefinedHi);
       }
       count = _limitValue(end, start, pointCount) - start;