在尝试实现动作减速器时出现角度ngrx投掷错误

Question

counter.actions.ts

import { createAction } from "@ngrx/store";
export const increment = createAction('[Counter Component] Increment');
export const decrement = createAction('[Counter Component] Decrement');
export const reset = createAction('[Counter Component] Reset');

计数器还原剂ts

import { createReducer, on } from "@ngrx/store";
import { increment, decrement,  reset } from "./counter.actions";
export const initialState = 0;
const _counterReducer = createReducer(
initialState,
on(increment, (state) => state + 1),
on(decrement, (state) => state - 1),
on(reset, (state) => 0)
);
export function counterReducer(state, action) {
return _counterReducer(state, action);
}

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { StoreModule } from '@ngrx/store';
import { counterReducer } from "./counter.reducer";
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
AppRoutingModule,
StoreModule.forRoot({ count: counterReducer })
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

输出16 StoreModule.forRoot(｛count：counterReducer｝(~~~~~错误：src/app/app.module.ts:16:27-错误TS2322:Type'(state:number，action:action(=>number"不可分配给类型"ActionReducer<数字，操作>'。参数"state"one_answers"state"的类型不兼容。类型"number | undefined"不可分配给类型"number"。类型"undefined"不可分配给类型"number"。

16     StoreModule.forRoot({ count: counterReducer })
~~~~~
Error: src/app/counter.reducer.ts:14:32 - error TS7006: Parameter 'state' implicitly has an 'any' type.

14 export function counterReducer(state, action) {
~~~~~
src/app/counter.reducer.ts:14:39 - error TS7006: Parameter 'action' implicitly has an 'any' type.

14 export function counterReducer(state, action) {

Answer 1

试试这个，只需修复你的初始状态

const _counterReducer = createReducer(
// initialize it
initialState = {count: number} ,
// your accessor need to access the values inside the state
on(increment, (state) =>  parseInt(state.count)++),
on(decrement, (state) =>  parseInt(state.count)--),
on(reset, (parseInt(state.count)) => 0)
);