在 useEffect 钩子的 if 条件内调用异步 function

Question

How can I call a redux action inside the if block of useEffect hook:

useEffect(async () => {
    if (nameId && selectedGroup === 'AGM') {
        const subPeople = await getSubPeople(nameId);
    }
}, [nameId, selectedGroup]);

I have two select boxes. If the person types in the name select box, I store the selected id of name in the nameId state. If user selects a group, I store it in selectedGroup , so only if both conditions match I need to call an API endpoint to get the subPeople .

If I comment this code there is no error. How can I make the snippet work?

Answer 1

You can move the async logic into a separate function and call it inside useEffect , since useEffect 's callback can't be async itself:

useEffect(() => {
  const getPeople = async () => {
    if (nameId && selectedGroup === 'AGM') {
      const subPeople = await getSubPeople(nameId);
      return subPeople; // Or set the state, etc.
    }
  }
  getPeople(); 
}, [nameId, selectedGroup]);