[英]Separate wrapper with api request in React
我通过 hoc 做了同样的事情。 这是组件本身:
function LoadingSnapshotHOC(Component) {
const NewComponent = (props) => {
const isMounted = useIsMounted();
const state = useSelector(({ dateParams }) => {
const { currentPage } = props;
return {
selectedTimeLabel: dateParams?.[currentPage].selectedTimePeriod.label,
compareTimeLabel: dateParams?.[currentPage].compareTimePeriod.label,
};
});
const [snapshot, setSnapshot] = useState("");
const updateSnapshot = async (deviceID) => {
const img = await getSnapshot(deviceID);
img.onload = () => {
if (isMounted.current) {
setSnapshot(img);
}
};
};
useEffect(() => {
if (props.deviceID) updateSnapshot(props.deviceID);
}, [props.deviceID]);
return (
<Component
{...props}
snapshot={snapshot}
selectedTimeLabel={state.selectedTimeLabel}
compareTimeLabel={state.compareTimeLabel}
/>
);
};
return NewComponent;
}
export default LoadingSnapshotHOC;
接下来,我包装了我的组件:
function HeatMapSnapshot({...}) {
...
}
export default LoadingSnapshotHOC(HeatMapSnapshot);
和
function TrafficFlowSnapshot({...}) {
...
}
export default LoadingSnapshotHOC(TrafficFlowSnapshot);
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