Cannot read properties of null (reading 'sourceEvent') in device mode

[5r1m]

Description

There is uncaught exception when clicking on pie chart in device mode in chrome

Steps to check or reproduce

• Open the pie chart example in device mode in chrome
• https://naver.github.io/billboard.js/demo/#Chart.PieChart
• Post load completion, click on any chart pie area

[5r1m]

Problem seems to be in this handler:

billboard.js/src/ChartInternal/shape/arc.ts

Line 798 in 65da5a8

const eventArc = getEventArc(event);

Unlike in mouse mode, event is not persisted in touch mode and adding below seems to fix the issue:
adding state.event = event;

[netil]

Hi @5r1m, thanks for the report. I'll check the issue.