ggregoire commented on issue #7763:
URL: https://github.com/apache/echarts/issues/7763#issuecomment-2898696843
If anyone interested:
```typescript
import type { ECharts } from 'echarts'
function convertSVGDataURLtoPNGDataURL(SVGDataURL: string): Promise<string> {
return new Promise(resolve => {
const canvas = document.createElement('canvas')
const context = canvas.getContext('2d')!
const image = new Image()
image.addEventListener(
'load',
() => {
canvas.width = image.width
canvas.height = image.height
context.fillStyle = '#fff'
context.fillRect(0, 0, canvas.width, canvas.height)
context.drawImage(image, 0, 0, canvas.width, canvas.height)
resolve(canvas.toDataURL('image/png'))
},
false,
)
image.src = SVGDataURL
})
}
export function downloadSVGChartAsPNG(
echartsInstance: ECharts | undefined,
filename: string,
) {
if (!echartsInstance) return
const url = echartsInstance.getDataURL({
type: 'svg',
pixelRatio: 2,
backgroundColor: '#fff',
})
convertSVGDataURLtoPNGDataURL(url).then(PNGDataURL => {
const link = document.createElement('a')
link.href = PNGDataURL
link.download = filename
document.body.appendChild(link)
link.click()
document.body.removeChild(link)
})
}
```
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