反應 useEffect 和 useCallback linting 錯誤 - 缺少依賴項

Question

即使我在定義它的父組件中使用推薦的 useCallback 鈎子，Linter 也抱怨缺少作為依賴項的函數。

有誰知道如何解決這一問題？ 似乎無法在任何地方找到示例

此處鏈接到沙箱https://codesandbox.io/s/hopeful-wind-w4sp5

const arr = ['One', 'Two', 'Three']

const SyncingData = () => {
  const [progress, setProgress] = useState(0)

  const [children, setChildrenProgress] = useState(arr.map(item => 0))

  const handleChildrenProgress = useCallback(
    (progress, index) => {
      setChildrenProgress(
        children.map((item, currIndex) =>
          index === currIndex ? progress : item,
        ),
      )
    },
    [children],
  )

  useEffect(() => {
    setProgress(
      children.reduce((sum, item) => (sum = sum + item), 0) / children.length,
    )
  }, [children])

  return (
    <div>
      <div>Total Progress: {progress}</div>
      <ul>
        {arr.map((item, index) => (
          <Child
            key={index}
            index={index}
            updateProgress={handleChildrenProgress}
            name={item}
            delay={10 * index}
          />
        ))}
      </ul>
    </div>
  )
}

const Child = ({updateProgress, name, index, delay}) => {
  const [progress, setProgress] = useState(0)


  // This is the useEffect the linter doesn't like
  useEffect(() => {
    updateProgress(progress, index)
  }, [progress, index])

  useInterval(() => {
    if (progress < 100) {
      setProgress(progress + 1)
    }
  }, delay)

  return (
    <div>
      {name} {progress}
    </div>
  )
}

Answer 1

我認為您應該嘗試在效果的依賴項列表中添加“updateProgress”：

useEffect(() => {
    updateProgress(progress, index)
  }, [progress, index, updateProgress])

函數 updateProgress 包含在您提供的 lambda 中。

linter 試圖告訴您，如果該函數發生更改，則效果將不會考慮該更改。