“viewFullscreen” menu item is not showing in the context menu of highcharts 6.2.0
问题 I have a highchart line chart which currently displayed in bootstrap 4 card. I want it to displayed full screen, which I'm currently aware that highchart 6.2.0 has option to enabled exporting file, so that I can use the exporting context menu. so, I enabled them but "showFullscreen" option not showing in the exporting context menu. I imported highchart and exporting module to the component. in the documentation highchart guys says that I have to include viewFullscreen as string to the