自定义Hook返回状态与setState时出现TypeScript错误求助

The issue here is a case sensitivity mismatch between the property name you're returning from your useProcesses hook and the one you're trying to destructure when calling the hook.

Looking at your hook's return statement:

return [{ Processes, isLoading, isError }, setProcesses];

You're using a capitalized Processes as the key in the returned object, but your state variable is actually named processes (lowercase p). When you call the hook:

const [{ processes, isLoading, isError }, setProcesses] = useProcesses(...);

You're trying to access a property named processes (lowercase), which doesn't exist on the returned object—hence the TypeScript error.

The Fix #

Update the return statement to use the lowercase processes (matching your state variable name):

return [{ processes, isLoading, isError }, setProcesses];

This aligns the property name with what you're destructuring, resolving the Property 'processes' does not exist error.

TypeScript is strictly case-sensitive, so even small differences like uppercase vs lowercase will trigger these kinds of errors. It's a good practice to keep variable and property names consistent in casing to avoid this.

内容的提问来源于stack exchange，提问作者LikeAKemper