score:2
you may see a full code example an app where a chart is updated with new data based on a selection in a Release dropdown here. In that code I check if chart exists, and remove it if it does before recreating it:
if (this.down('#myChart')) {
this.remove('myChart');
}
this.add(
{
xtype: 'rallychart',
height: 400,
itemId: 'myChart',
chartConfig: {
//....
},
chartData: {
categories: scheduleStateGroups,
series: [
{
//...
}
]
}
}
);
this.down('#myChart')._unmask(); //otherwise loading mask does not go away
Source: stackoverflow.com
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