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docs: update TS and useRef example #554

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docs: update TS and useRef example #554

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18 changes: 18 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -339,6 +339,24 @@ const echartInstance = this.echartRef.getEchartsInstance();
const base64 = echartInstance.getDataURL();
```

TypeScript and `useRef()` example:
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useRef() example:

remove typescript


```ts
const getOption = () => {/** */}
export default function App() {
const echartsRef = useRef<InstanceType<typeof ReactEcharts>>(null);

useEffect(() => {
if (echartsRef.current) {
const echartsInstance = echartsRef.current.getEchartsInstance();
// do something
echartsInstance.resize();
}
}, []);
return <ReactEcharts ref={echartsRef} option={getOption()} />;
}
```

**About API of echarts, can see** [https://echarts.apache.org/api.html#echartsInstance](https://echarts.apache.org/api.html#echartsInstance).

You can use the API to do:
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