Redux-toolkit：state 是 createSlice reducer 中的代理

Question

我正在尝试在切片缩减器内部的状态数组中附加/更新一些数据，但是当我尝试console.log我感兴趣的状态的.projects数组时，我只得到了一个 javascript 代理。 这里发生了什么（我做错了什么）？

import { createSlice } from '@reduxjs/toolkit';

const initialState = {
  projects: [],
};

const projectsSlice = createSlice({
  name: 'projectsSlice',
  initialState: { ...initialState },
  reducers: {
    addProject(state, action) {
      const { project } = action.payload;
      const newProjects = [project, ...state.projects];

      console.group('add project');
      console.log('project: ', project);
      console.log('state projects: ', state.projects);
      console.log('newProjects: ', newProjects);
      console.groupEnd();

      state.projects = newProjects;
    },
    setProjects(state, action) {
      const { projects } = action.payload;
      state.projects = projects;
    },
    removeProject(state, action) {
      const { projectId } = action.payload;
      const newProjects = [...state.projects].filter((project) => project.id !== projectId);
      state.projects = newProjects;
    },
    updateProject(state, action) {
      const { project } = action.payload;
      const projectIndex = state.projects.findIndex((stateProject) => stateProject.id === project.id);
      const newProjects = [...state.projects].splice(projectIndex, 1, project);

      console.group('updateProject');
      console.log('project: ', project);
      console.log('projectIndex: ', projectIndex);
      console.log('state projects: ', state.projects);
      console.log('newProjects: ', newProjects);
      console.groupEnd();

      state.projects = newProjects;
    },
  },
});

export const { addProject, removeProject, updateProject, setProjects } = projectsSlice.actions;

export default projectsSlice.reducer;

Answer 1

代理是您可以改变该减速器中的状态并在您的状态中获得不可变副本的原因 - 但浏览器在记录代理方面非常糟糕。

根据文档，您可以使用 RTK&immer 的current导出：

const slice = createSlice({
  name: 'todos',
  initialState: [{ id: 1, title: 'Example todo' }],
  reducers: {
    addTodo: (state, action) => {
      console.log('before', current(state))
      state.push(action.payload)
      console.log('after', current(state))
    },
  },
})

Answer 2

您需要使用当前

import { current } from '@reduxjs/toolkit'

这样，您就可以达到当前状态并使用它们，之后，您可以在 reducer 中发送 return 以返回新数据。

将看起来像这样：

const referralSlicer = createSlice({
name: 'referral',
initialState: {
  referrals: [],
  currentCard: 0,
} as IReferralSlicer,
reducers: {
  addReferrals(state, { payload }) {
    return {
      referrals: [...state.referrals, payload],
    }
  },
  deleteReferral(state, { payload }) {
    const currentState = current(state)

    return {
      ...currentState,
      referrals: currentState.referrals.splice(payload, 1),
    }
  },
  setCurrentCard(state, { payload }) {
    return {
      referrals: state.referrals,
      currentCard: payload,
    }
  },
},
})