TypeScript

Container

出典: Typescript×ReduxでStateがundefinedに？確認すること！ — ソースコードを解説 / Container

Container (typescript)#adc8bd5d5619

import {ReduxAction, ReduxState} from "../Store/store";
import {DecrementAmount, IncrementAmount} from "../Actions/CounterAction";
import {connect} from "react-redux";
import {Dispatch} from "react";
import Counter from "./Counter";
 
export class ActionDispather{
	constructor(private dispatch: (action : ReduxAction) => void) {
	}
 
	public Increment() {
		this.dispatch(IncrementAmount())
	}
 
	public Decrement(){
		this.dispatch(DecrementAmount())
	}
}
 
export default connect(
	(state : ReduxState) => {
		return {value : state.Counter}
},
	(dispatch : Dispatch<ReduxAction>) => ({actions : new ActionDispather(dispatch)})
)(Counter)

▸ この snippet は実行結果未収録

▸ 実行結果は未収録です

id: #adc8bd5d5619
lines: 25
extracted: 2026-06-10

Source収録記事

この snippet は記事の「ソースコードを解説 / Container」セクションに登場する。コードの前後の文脈・ハマりどころの解説は記事本文で。

技術記事Gitデータ有React

Typescript×ReduxでStateがundefinedに？確認すること！

6年前12 min

同じ記事から

11 件

TypeScript

import {Action} from 'redux'

export enum	ActionNames{
	Increment = 'inc',

未収録

Action

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TypeScript

import {ActionNames, ActionType} from "../Actions/CounterAction";


export interface IState {

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Reducer

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TypeScript

import {combineReducers,createStore,Action} from 'redux'
import CounterReducer, {IState} from "../Reducers/CounterReducer";
import {ActionType} from "../Actions/CounterAction";

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Store

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TypeScript

import React from "react";
import {IState} from "../Reducers/CounterReducer";
import {ActionDispather} from "./Container";

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Component

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TypeScript

import React from 'react';
import ReactDOM from 'react-dom';
import * as serviceWorker from './serviceWorker';
import {Provider} from "react-redux";

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Index

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TypeScript

	render() {
		return (
			<div>
				{/*<p>CurrentCount:{this.props.value.num}</p>*/}

▶ 実行可

Reduxでstateが undefinedに？どんな現象？

#724b87f56936

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