JiahuiChen99 commented on issue #16659:
URL: https://github.com/apache/echarts/issues/16659#issuecomment-1063997017
> > In vue data() I have a heatmap_chart variable initialized to null,
>
> @JiahuiChen99 This is not expected. Just remove the `heatmap_chart`
variable from vue `data` block.
Declaring the chart in the mounted scope, like this, seems to work.
```
mounted(){
let heatmap_chart = echarts.init();
}
```
But, how am I supposed to reference the chart later in the beforeUnmount
block, so that I can dispose it? And what's the reason why, what I did before
the doesn't work?
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