React Mobx-商店更改后组件未更新 [英] React Mobx - component not updating after store change

问题描述

使用Mobx，在更新商店(即单击按钮)后，该组件不会重新呈现.我已经安装了mobx devtools，它在初始加载后什么也不显示，并且在控制台中没有错误.有任何想法我做错了吗?

Using Mobx, after updating the store (i.e. clicking the button) the component does not re-render. I've installed mobx devtools which shows nothing after the initial load, and there is no error in the console. Any ideas what I've done wrong?

Store.js:

import { observable } from 'mobx';

class Store {

    @observable me;

    constructor() {
        this.me = 'hello';
    }

    change_me(){
        this.me = 'test 1234';

    }

}


export default Store;

layout.js:

layout.js:

import React from "react";
import { observer } from 'mobx-react';


@observer
export default class Layout extends React.Component{

    render(){

        return(
            <div>
                <h1>{this.props.store.me}</h1>
              <button onClick={this.on_change}>Change</button>
            </div>
        )
    }

    on_change = () => {
        this.props.store.change_me();
    }
}

index.js:

import React from "react";
import ReactDOM from "react-dom";
import Layout from "./components/Layout";
import Store from "./Store";
import DevTools, { configureDevtool } from 'mobx-react-devtools';

// Any configurations are optional
configureDevtool({
    // Turn on logging changes button programmatically:
    logEnabled: true,
    // Turn off displaying conponents' updates button programmatically:
    updatesEnabled: false,
    // Log only changes of type `reaction`
    // (only affects top-level messages in console, not inside groups)
    logFilter: change => change.type === 'reaction',
});


const app = document.getElementById('app');
const store = new Store();

ReactDOM.render(

    <div>
        <Layout store={store} />
        <DevTools />
    </div>
, app);

推荐答案

我首先将@action添加到您的change_me()函数中.据我了解，并不总是完全需要它，但是当我忘记添加它时，在自己的代码中几次遇到这样的问题.

I would start by adding @action to your change_me() function. From what I understand, it's not always completely required, but I have encountered problems like this in my own code several times when I've forgotten to add it.

另外按照@mweststrate的建议发布您的.babelrc，因为它将帮助其他人检查是否已加载正确的插件.

Additionally post your .babelrc as @mweststrate suggested, as it will help others to check that the proper plugins are loaded.

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