#### Resources of visitor analytics

Add the following JavaScript URL under the <b>Resources</b> tab. It loads <a href="https://echarts.apache.org/" target="_blank">ECharts</a> before your function runs and exposes the <code>echarts</code> global (accessed as <code>window.echarts</code>):

```text
{:code-style="max-height: 400px;"}
https://cdn.jsdelivr.net/npm/echarts@5/dist/echarts.min.js
{:copy-code}
```

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