jquery 生成的 chart 如何自动保存为图片

[xumng123]

jquery 生成的 chart 如何自动保存为图片，想插入到邮件附件里

[vanton]

# .toBase64Image(type?, quality?)

> This returns a base 64 encoded string of the chart in its current state.

```
myLineChart.toBase64Image();
// => returns png data url of the image on the canvas

myLineChart.toBase64Image('image/jpeg', 1)
// => returns a jpeg data url in the highest quality of the canvas
```