I'm using React hooks + Apollo hooks to lazy load a series of components. These components make a query each time they are mounted. I want the parent component for these components to keep track of when each async call resolves with data.
我有一个工作示例,它将父状态传递给它的子状态,并在回调中进行更新。但是,我看到过这样的情况:子级在父级有时间更新之前试图更新父级状态。这导致状态要么更新得过多,要么更新不足。
这是我目前正在做的一个例子:
const Parent = () => {
const [state, setState] = useState();
const handleChange = () => {
setState(state + 1);
}
if (state < 10) {
return <div>no more results</div>;
}
// it's possilbe that 5-6 mount at once and fire off queries
return (
<>
{arr.map(c => <Child handleChange={handleChange} />)}
</>
)
}
const Child = ({ handleChange }) => {
const [ loadMore, { called, loading, data }] = useLazyQuery(QUERY, {
onCompleted: (data) => {
if (data.length > 0) {
handleChange()
}
}
});
// When a user scrolls into view, make request
return (
<Waypoint onEnter={loadMore}>
{do something with data}
</Waypoint>
)
};
当子级进行异步调用时,是否有更好的方法来管理父级状态?不引入Redux?
这可能是一个解决方案。