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Optimize Useeffect with Updater Function

You are seeing an ESLint warning (probably from react-hooks/exhaustive-deps) because you are using apiParameters inside the useEffect, but it's not in the dependency array.

👉 The problem:

  • apiParameters comes from the component scope and is "stale" inside useEffect when you use setApiParameters({ ...apiParameters, models: data }).
  • ESLint suggests adding apiParameters to the dependency array to ensure it stays up to date — but you don’t want that, because you want the useEffect to run once (empty dependency []).

Solution (safe pattern): Use functional update to avoid stale closure

React allows you to use this pattern:

setApiParameters((prev) => ({ ...prev, models: data }));

👉 This way you do not need to depend on apiParameters, because you are always using the latest value.


Final optimized version (solves ESLint + keeps one-time run):

useEffect(() => {
  let ignore = false;
  async function fetchModel() {
    try {
      const response = await fetch("https://image.pollinations.ai/models");
      if (!response.ok) {
        console.log("Failed to Fetch Models");
        return;
      }
      const data = await response.json();
      if (!ignore) {
        setApiParameters((prev) => ({ ...prev, models: data }));
      }
    } catch (error) {
      console.log(error.message);
    }
  }
  fetchModel();
  return () => (ignore = true);
}, []); // still empty array — safe now

Summary:

✅ ESLint error will be gone — no need to add apiParameters to dependencies. ✅ Your effect still runs only once ([] dependency). ✅ Code works safely even if apiParameters changes in the future.


If you want, I can also explain why "functional update" solves the stale closure problem — just say if you want that too. Would you like to? 🚀


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