javascript - import * as types from '../constants/ActionTypes' 什么意思

Question

import * as types from '../constants/ActionTypes';

export function addTodo(text) {
  return { type: types.ADD_TODO, text }
}

export function deleteTodo(id) {
  return { type: types.DELETE_TODO, id }
}

export function editTodo(id, text) {
  return { type: types.EDIT_TODO, id, text }
}

export function completeTodo(id) {
  return { type: types.COMPLETE_TODO, id }
}

export function completeAll() {
  return { type: types.COMPLETE_ALL }
}

export function clearCompleted() {
  return { type: types.CLEAR_COMPLETED }
}


这里面的 * 是什么用途，在后续的代码中没看到有用到*的地方。

Answer 1

楼主问得是*什么作用吧！这个就是全部的意思～我们写css的时候也会用到啊！就是把被加载模块整体引入的意思

Answer 2

constants/ActionTypes:

export const a = 1;
export const b = 2;

import * as types from '../constants/ActionTypes';

types 就是

{a:1,b:2}

针对你给出的代码就是

{
    addTodo,
    deleteTodo,
    editTodo,
    completeTodo,
    completeAll,
    clearCompleted
}

Answer 3

ECMAScript6 import语法，参考模块整体加载

翻译一下好了：
import (引入) * (所有export属性) as (到) types (types变量) from (从) '../constants/ActionTypes' (ActionTypes)