React Hook useMemo Missing Dependency: 'type' - 解决方法和解释

React Hook useMemo has a missing dependency warning is a linting warning from React. It is suggesting that the dependency array passed to the useMemo hook is missing the 'type' dependency.\n\nIn React, the useMemo hook is used to memoize a value and prevent unnecessary calculations or rendering. The dependency array passed to useMemo specifies the values that the memoized value depends on. This array is used by React to determine when the memoized value needs to be recalculated.\n\nTo address the warning, you have two options:\n\n1. Include the missing dependency:\n If the 'type' value is indeed a dependency of the useMemo hook, you should include it in the dependency array. For example:\n\n jsx\n const memoizedValue = useMemo(() => {\n // memoized calculation\n }, [type]);\n \n\n This ensures that whenever the 'type' value changes, the memoized value will be recalculated.\n\n2. Remove the dependency array:\n If the 'type' value is not a dependency and the memoized value does not depend on it, you can remove the dependency array altogether. This will prevent the warning from appearing. However, be cautious when doing this, as it might lead to unexpected behavior if the memoized value does indeed depend on the 'type' value.\n\n jsx\n const memoizedValue = useMemo(() => {\n // memoized calculation\n }, []);\n \n\n By removing the dependency array, the memoized value will only be calculated once, regardless of any changes in the component's state or props.\n\nChoose the appropriate option based on your specific use case.