I have this code on my index.js file in my ReactJS project and I want the redux's <Provider> tag to wrap them up so that they can all access the same store, The question is, how can I do that?
ReactDOM.render(<Header />, document.getElementById('header'));
ReactDOM.render(<App />, document.getElementById('root'));
ReactDOM.render(<Footer />, document.getElementById('footer'));
Well, if the store is the same, then you can simply apply the <Provider> to all pieces and they will all use the same Redux store. The Provider is not mandatory to be unique, just the store. Something like this:
const store = createStore(...); // or any valid Redux store declaration or import
ReactDOM.render(<Provider store={store}><Header /></Provider>, document.getElementById('header'));
ReactDOM.render(<Provider store={store}><App /></Provider>, document.getElementById('root'));
ReactDOM.render(<Provider store={store}><Footer /></Provider>, document.getElementById('footer'));
As another answer already suggests, this can be achieved by using same store in Redux provider. Since Redux isn't tied to React component hierarchy, connected components don't necessarily should have a common parent:
ReactDOM.render(
<Provider store={store}><Header /></Provider>,
document.getElementById('header')
);
ReactDOM.render(
<Provider store={store}><App /></Provider>,
document.getElementById('root')
);
ReactDOM.render(
<Provider store={store}><Footer /></Provider>,
document.getElementById('footer')
);
Another option that isn't specific to Redux but can also be used with any React application that has several root components is to use portals for these components, as shown in this answer:
const Page = props => (
<Provider store={store}>
{ReactDOM.createPortal(<Header/>, document.getElementById('header'))}
{ReactDOM.createPortal(<App/>, document.getElementById('root'))}
{ReactDOM.createPortal(<Footer/>, document.getElementById('footer'))}
</Provider>
);
ReactDOM.render(<Page/>, document.getElementById('page'));
Where <div id="page"></div> is placeholder element that exists in HTML body to mount the application and doesn't have to be a parent to header, etc. elements.
This option can be used with React context API Provider or page component state as well.
Is there a reason that you need to target three html elements? The standard practice here would be to just target root and handle the rest in your React application, like below:
In index.js:
const store = createStore(...);
ReactDOM.render(
<Provider store={store}>
<App />
</Provider>, document.getElementById('root'));
In App.js:
export default = () =>
<Header />
<Body />
<Footer />
Your entire HTML body would look like this (recommended approach by Facebook's create-react-app):
<body>
<noscript>JavaScript must be enabled to run this application.</noscript>
<div id="root"></div>
</body>
Related
I have a module A built in react-redux. A is the parent component name which looks somewhat like
const app = (
<Provider store={store}>
<A />
</Provider>
);
ReactDOM.render(app, document.getElementById('id'));
Inside component A there is a component C.js which has a connect function
A.js
render() {
return (
<div>
<C />
</div>
);
}
C.js
render() {
return(<div>SomeCode</div>
}
export default connect(mapStateToProps, mapDispatchToProps)(C);
There is another B.js file which is a ReactComponent (no redux used here). It has its own state.
I want to use the component A inside B's render method something like
import A from '/path'
render() {
return (<A/>)
}
While doing so I am getting an error.
Could not find "store" in the context of "Connect(C)".
Either wrap the root component in a , or pass a custom React context provider to
and the corresponding React context consumer to Connect(C) in connect options.
Any help appreciated.
I modified parent and exported it as following
render(){
return(
<Provider store={store}>
<A />
</Provider>
);}
Importing A worked fine
I've integrated React-redux in a externalJs Application (built on custom JS framework). I need to set initial data for redux store from externalJS but, the externalJs is unable to access the react store to set the data. The store gets triggered when the root reactJS component is mounted on the DOM , but i need to set the initial data before its Mounted on the DOM. i referred following links but they were not able to resolve my problem. Can someone please tell me what I am missing?
https://brettdewoody.com/accessing-component-methods-and-state-from-outside-react/
Accessing react components outside
i'm using webpacks, react 16.1 with redux
sample root component structure given below in index.js
render() {
return (
<Provider store={store}>
<Email ref={(EmailComponent) => { window.EmailComponent = EmailComponent }} />
</Provider>
);
}
I'm assuming you're trying to expose EmailComponent and 'store' to the DOM and other frameworks since you are declaring it on a global window object. React.render has a callback as a third parameter which you can use to know when the React App is mounted to DOM.
ReactDOM.render(<App />, document.getElementById('root'), function () {
// now the root React App is mounted and the data from it will be available
// your window.EmailComponent and window.store should now be avialable
console.log(window.EmailComponent, window.store)
})
render() {
window.store = store
return (
<Provider store={store}>
<Email ref={(EmailComponent) => { window.EmailComponent = EmailComponent }} />
</Provider>
);
}
React Router has been working fine during development with my Webpack dev server and hot reloader, but when configuring for production it seems to fail. It works when the page is refreshed, but <Link/> components and pushing to the History API are not causing the UI to change. My setup is as follows. Where render is the setup that works locally with Webpack dev server and renderTest is what isn't working.
const render = Component => {
ReactDOM.render(
<MuiThemeProvider muiTheme={Theme}>
<Router>
<AppContainer>
<Provider store={store}>
<Component/>
</Provider>
</AppContainer>
</Router>
</MuiThemeProvider>,
document.getElementById('root')
)
};
const renderTest = Component => {
ReactDOM.render(
<MuiThemeProvider muiTheme={Theme}>
<Router>
<Provider store={store}>
<Component/>
</Provider>
</Router>
</MuiThemeProvider>,
document.getElementById('root')
)
};
//render(Root);
renderTest(Root);
// if (module.hot) {
// module.hot.accept('./containers/root-container/root-container', () => { render(Root) });
// }
ok I figured it out. turns out there is a known compatibility issue with react router (v4) and redux. (more info on that here: github.com/ReactTraining/react-router/issues/4671) a work around that I found to work for my situation was to wrap my root component with withRouter that way the location context gets passed to every component. Not an ideal solution, but it works until there is an official fix.
export default withRouter(connect(mapStateToProps)(Root));
i have some problem with React.js.
this is my code:
import React from 'react';
import { createStore } from 'redux';
import { Provider } from 'react-redux';
import App from './containers/App';
import todoApp from './reducers';
let store = createStore(todoApp);
let rootElement = document.getElementById('root');
React.render(
<Provider store={store}>
{() => <App />}
</Provider>,
rootElement
);
and runs the page, it saids:
Failed propType: Invalid prop children supplied to Provider, expected a single ReactElement
this is the list of my related installed node modules:
react 15.0.1
react-redux 4.4.5
redux 3.4.0
actually, i am currently learning React with Redux, so it is hard to me how should i do. i just followed tutorial on website(i can give a link, but it is not english) but it is just not working with that error message.
as i searched, someone said upgrade version of react and react-redux, but i installed latest versions.
any advice will be very appreciate it.
According to the doc, you can just use a normal React element instead of a function inside <Provider />.
As a result, simply change your code to
<Provider store={store}>
<App />
</Provider>
I think this has changed since react#0.14.
The original question had a typo. Your response is correct in the proper syntax.
However, the direct reason is that <App /> needs to be on a separate line.
If you put it on the same line as <Provider store={store}> React/Redux tries to do more with it than it should.
ReactDOM.render(
<Provider store={store}>
<App />
</Provider>,
document.getElementById('root')
);
I was brought to this and I simply forgot to provide a prop. I would say make sure that you are providing all the props that your component is using and that should fix it.
Due to the complexity of the application I am working on I have decided on using a nested redux container rather than passing an action as a prop down to the child components. However, this has proved to be problematic for unit testing when rendering the OuterContainer with jsdom in combination with mocha, chai and sinon.
Here is a contrived example of the view structure:
<OuterContainer>
<div>
<InnerContainer />
</div>
</OuterContainer>
where OuterContainer & InnerContainer are wrapped with connect. e.g.:
export connect(<mapStateToProps>)(<Component>)
When running tests the error I am getting is:
Invariant Violation: Could not find "store" in either the context or props of "Connect(Component)". Either wrap the root component in a `<Provider>`, or explicitly pass "store" as a prop to "Connect(Component)".
Is there a way to unwrap or stub the InnerContainer for unit testing without having to use shallow rendering?
Wrap your component in <Provider> when testing. It’s up to you whether to supply a real store or a mock with { dispatch, getState, subscribe } to it. Wrapping the outermost component in <Provider store={store}> will also make the store available to the child components at any level of nesting—just like in the app itself.
const store = createStore(reducer) // can also be a mock
ReactTestUtils.renderIntoDocument(
<Provider store={store}>
<OuterContainer />
</Provider>
)
Another approach is to export both the component to be connected and the container. The container as default, of course.
export const Comp = (props) => (<p>Whatever</p>)
export default connect(...)(Comp)
Hence, you can unit test Comp.
Not sure if this is what your problem is, but I'm sure this will probably help a few people out there looking at this feed.
I had the same error and it was a simple fix:
I had forgotten to pass my component my store object in my entry file (using webpack).
I just added an attribute to the Root component "store={store}" see below:
document.addEventListener("DOMContentLoaded", () => {
const store = configureStore();
ReactDOM.render(<Root store={store} />,
document.getElementById('content'));
});
This was my root file code for reference as well:
import React from 'react';
import { Provider } from 'react-redux';
import App from './app';
const Root = ({ store }) => (
<Provider store={ store }>
<App />
</Provider>
);
export default Root;
Hope that helps someone!
Mock the Provider component to return the child component.
Add this before describe().
jest.mock('Provider', () => ({children}) => children);