在状态中重新排序数组

Question

我使用 zustand 创建一个带有待办事项数组的全局状态，我有添加、删除和切换每个待办事项完成/撤消的功能。

我还使用 Dnd Kit 拖放每个 ToDo 组件并在全局上下文中对它们重新排序，为此我需要以这种方式在 zustand 存储中创建一个 reorderTodo 函数：

const handleDragEnd = (event: any) => {
    const { active, over } = event;

    if (active.id !== over.id) {
        const newIndex = filteredTodos.findIndex(
            (todo) => todo.id === over.id
        );
        setFilteredTodos((filteredTodos) => {
            const oldIndex = filteredTodos.findIndex(
                (todo) => todo.id === active.id
            );

            return arrayMove(filteredTodos, oldIndex, newIndex);
        });

        reorderTodo(active.id, newIndex);
    }
};


import { create } from "zustand";

export const useTodosStore = create(() => ({
    todos: [
        { id: 1, text: "Learn TypeScript", done: true },
        { id: 2, text: "Try immer", done: false },
        { id: 3, text: "Tweet about it", done: false },
    ],
    addTodo: (text: string, done: boolean) => {
        useTodosStore.setState((state) => ({
            todos: [
                ...state.todos,
                { id: state.todos.length + 1, text, done: done },
            ],
        }));
    },
    toggleTodo: (id: number) =>
        useTodosStore.setState((state) => ({
            todos: state.todos.map((todo) =>
                todo.id === id ? { ...todo, done: !todo.done } : todo
            ),
        })),
    removeTodo: (id: number) =>
        useTodosStore.setState((state) => ({
            todos: state.todos.filter((todo) => todo.id !== id),
        })),

    reorderTodo: (id: number, position: number) =>
        useTodosStore.setState((state) => {
            const todos = [...state.todos];
            const todo = todos.find((todo) => todo.id === id);
            if (!todo) return;
            const idx = todos.indexOf(todo);
            todos.splice(idx, 1);
            todos.splice(position, 0, todo);
            return { todos };
        }),
}));

它在 VSCode 中给了我一个大的打字稿错误：

Argument of type '(state: { todos: { id: number; text: string; done: boolean; }[]; addTodo: (text: string, done: boolean) => void; toggleTodo: (id: number) => void; removeTodo: (id: number) => void; reorderTodo: (id: number, position: number) => void; }) => { ...; } | undefined' is not assignable to parameter of type '{ todos: { id: number; text: string; done: boolean; }[]; addTodo: (text: string, done: boolean) => void; toggleTodo: (id: number) => void; removeTodo: (id: number) => void; reorderTodo: (id: number, position: number) => void; } | Partial<...> | ((state: { ...; }) => { ...; } | Partial<...>)'.
  Type '(state: { todos: { id: number; text: string; done: boolean; }[]; addTodo: (text: string, done: boolean) => void; toggleTodo: (id: number) => void; removeTodo: (id: number) => void; reorderTodo: (id: number, position: number) => void; }) => { ...; } | undefined' is not assignable to type '(state: { todos: { id: number; text: string; done: boolean; }[]; addTodo: (text: string, done: boolean) => void; toggleTodo: (id: number) => void; removeTodo: (id: number) => void; reorderTodo: (id: number, position: number) => void; }) => { ...; } | Partial<...>'.

但是我可以使用 yarn dev 在开发模式下运行应用程序，当我想使用 yarn build 构建应用程序时，问题就出现了，它在控制台中给了我这个错误，因此我也无法部署该应用程序在 Netlify/vercel 中

如何创建重新排序函数来修复此错误？

Answer 1

问题是 set 方法需要返回状态，并且您的代码在 setState 中返回 undefined：if (!todo) return;。在这一行中，您可以将代码更改为 if (!todo) return { todos };