How to get Image (svg or png) of chart?

[budwol]

I tried:

<Svg ref = {this.props.svgRef}>
   <LineChart />
</Svg>

...
onPress={() => {
svgRef.current?.toDataURL((base64) => {                                    
console.log(base64);
);

but the base64 just contains an empty image.

the graph i want to get as svg or png looks like this:

can anyone help?