Question

我正在尝试在切片减缩器内部的状态数组中附加/更新某些数据，但是当我尝试console.log对我感兴趣的状态的.projects数组时，我得到的只是一个JavaScript代理。这是怎么回事（我在做什么错）？

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

使用Proxy的原因是您可以仅在化简器中更改状态，而仅在您的状态中获得不可变的副本-但是浏览器确实很难记录代理。

per the docs，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))
    },
  },
})

Redux-Toolkit：State是createSlice reducer内部的代理

1 个答案: