I've created a react component called ImagePost and when I call it in my App.js it doesn't return on page load.
import Container from 'react-bootstrap/Container';
import Row from 'react-bootstrap/Row';
import Col from 'react-bootstrap/Col';
const ImagePost = () => {
return (
<div className='container'>
<Container fluid='md'>
<Col xs={6}><img src={'./Images/lonepeak.jpg'} alt="Post Image"></img></Col>
<Row>
<Col>Title</Col>
<Col>Description</Col>
</Row>
</Container>
</div>
)
}
export default ImagePost
Pls, check you imported the function at the top of app.js and that paths are correctly done.
If it is inside the route check the routing path. It works finely in my local(attached img at the bottom).
in app.js:
import ImagePost from "./ImagePost/ImagePost";
...
<Route path="/imagePost" element={<ImagePost></ImagePost>} />
package.json:
"react": "^18.2.0",
"react-activity": "^2.1.3",
"react-bootstrap": "^2.5.0",
"react-dom": "^18.2.0",
"react-router-bootstrap": "^0.26.2",
"react-router-dom": "^6.3.0",
Related
EDIT: I believe the reason that I ran into this problem is I didn't use the ionic start command to create my project and because I didn't have the Ionic CDN in my HTML file.
I hope I can explain this issue I'm having in a clean and concise way.
Environment Information
I am currently using Ionic 6 with React 18
And here are my Dependencies:
"dependencies": {
"#ionic/react": "^6.1.2",
"#ionic/react-router": "^6.1.2",
"#testing-library/jest-dom": "^5.16.4",
"#testing-library/react": "^13.1.1",
"#testing-library/user-event": "^13.5.0",
"#types/jest": "^27.4.1",
"#types/node": "^16.11.27",
"#types/react": "^18.0.6",
"#types/react-dom": "^18.0.2",
"axios": "^0.26.1",
"bootstrap": "^5.1.3",
"dart-sass": "^1.25.0",
"node": "16.14.2",
"react": "^18.0.0",
"react-dom": "^18.0.0",
"react-router": "^5.3.1",
"react-router-dom": "^5.3.1",
"react-scripts": "5.0.1",
"reactstrap": "^9.0.2",
"testcafe-react-selectors": "^4.1.5",
"typescript": "^4.6.3",
"web-vitals": "^2.1.4",
"xlsx": "^0.18.5"
},
"devDependencies": {
"#types/jest": "^27.4.1",
"#types/node": "17.0.24",
"#types/react": "^18.0.5",
"#types/react-dom": "^18.0.1",
"#types/react-router": "^5.1.18",
"#types/react-router-dom": "^5.3.3",
"#typescript-eslint/eslint-plugin": "^5.19.0",
"#typescript-eslint/parser": "^5.19.0",
"eslint-config-prettier": "^8.5.0",
"eslint-plugin-prettier": "^4.0.0",
"jest": "^27.5.1",
"prettier": "^2.6.2",
"react-scripts": "^5.0.1",
"start-server-and-test": "^1.14.0",
"testcafe": "^1.18.6",
"typescript": "4.6.3",
"typescript-plugin-css-modules": "^3.4.0"
},
Goal
I want to be able to have an Ionic React multi-page application. Obviously it will still be a SPA and not actually have different pages but I want to utilize Ionic's IonPage component which creates a new React View that can be navigated to.
Expected Results
I've stripped much of my project to just bare bones components that I want to be able to use to create a side navigation and be able to navigate to each page and see the contents. Currently I'm just trying to get the ability to see everything from a React Component wrapped in IonPage. This is my App.tsx page:
App.tsx
import { IonApp, IonRouterOutlet, setupIonicReact } from '#ionic/react';
import { IonReactRouter } from '#ionic/react-router';
import React from 'react';
import { Route } from 'react-router';
import Home from './components/Home';
import './custom.css';
setupIonicReact({
mode: 'md',
});
function App() {
return (
<IonApp>
<IonReactRouter>
<IonRouterOutlet>
<Route path="/" component={Home} exact={true} />
</IonRouterOutlet>
</IonReactRouter>
</IonApp>
);
}
export default App;
I've tried a variety of layouts for my Home.tsx file. Currently this is what is inside
First situation
Home.tsx Current Version
import { IonContent, IonHeader, IonPage } from '#ionic/react';
import React from 'react';
const Home: React.FC = () => {
return (
<IonPage>
<IonHeader>Example</IonHeader>
<IonContent fullscreen>
<h1>Test</h1>
</IonContent>
</IonPage>
);
};
export default Home;
With this setup, the Example Header text shows and is styled like a header correctly. However, the Content Text doesn't show up at all on this. I've determined the reason why it doesn't show up is because the ion-content element/component's height is set to 0. This is not expected. We don't have any css in our project targeting ion-content elements.
Second situation
import { IonContent, IonPage } from '#ionic/react';
import React from 'react';
const Home: React.FC = () => {
return (
<IonPage>
<IonContent fullscreen>
<h1>Test</h1>
</IonContent>
</IonPage>
);
};
export default Home;
In this situation I expect the elements inside of the IonContent Component to be rendered. I originally didn't have the 'fullscreen' attribute but added it recently to test if it was different. It didn't have an affect. What the result is is a completely blank page with the ion-page having width of 0 as well as the ion-content having a width of 0. If I set the widths of the ion-page manually it appears the ion-content's width and height update as well and it shows the content I was looing for.
Third Situation
import { IonContent } from '#ionic/react';
import React from 'react';
const Home: React.FC = () => {
return (
<IonContent fullscreen>
<h1>Test</h1>
</IonContent>
);
};
export default Home;
In this situation I've removed the IonPage element from the page. Surprisingly it appears that the content is displayed in this situation even though I've seen online that the IonRouter need to find an element with IonPage.
What I want to achieve:
I want to be able to have a react component with IonPage, IonHeader, and IonContent and have all elements inside of these render on the page when navigated to it.
What I want to know
What is causing the IonPage to behave strangely by having 0 height at some points. Why does the Content not show when wrapped around an IonPage but an IonHeader wrapped around an IonPage does show.
No Error Messages Available
Additional Notes
I also attempted to create a new IonicProject with react 17 instead of 18 as I thought it was a support issue, but it appears with the same full code with IonPage, IonContent, and IonHeader the content was not displaying. Thank you for your time!
I basically created a sidenav template from ionic start and determined all of the differences between the two projects.
I eventually determined that there are additional css import statements that I didn't realize I needed to add to my App.tsx in order for the IonApp,IonHeader,IonContent to work correctly.
These are the imports I found from the template project:
/* Core CSS required for Ionic components to work properly */
import "#ionic/react/css/core.css";
/* Basic CSS for apps built with Ionic */
import "#ionic/react/css/normalize.css";
import "#ionic/react/css/structure.css";
import "#ionic/react/css/typography.css";
/* Optional CSS utils that can be commented out */
import "#ionic/react/css/padding.css";
import "#ionic/react/css/float-elements.css";
import "#ionic/react/css/text-alignment.css";
import "#ionic/react/css/text-transformation.css";
import "#ionic/react/css/flex-utils.css";
import "#ionic/react/css/display.css";
/* Theme variables */
import "./theme/variables.css";
The theme variables are option and if there isn't a variables.css file in the theme folder it will give an error.
However after adding these import statements all of the content on the page renders.
I have a React component Basket and another component ProductLine. Both components connect with react-redux
BasketComponent:
function Basket({ basket }) {
return (
<Container>
<Row>
{basket.items.map(item => (
<ProductLine key={item.sku} item={item} ></ProductLine>
))}
</Row>
</Container>
)
}
export default connect(state => ({
basket: state.basket,
}))(Basket);
ProductLineComponent:
function ProductLine({ item }) {
return (
<Container>
<Row className="mb-2">
<Col md={5}>{item.name}</Col>
</Row>
</Container>
)
}
export default connect((state, ownProp) => ({
item: ownProp.item
}))(ProductLine)
Now every time I am getting this error Each child in a list should have a unique "key" prop.
I tried adding key={item.sku} in Basket or ProductLine or Both but it didn't work. every time it shows the same error. As a result, my product line wasn't updated correctly.
Here is React component SS to show in more detail.
Adding Key on both component
Dependencies:
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-redux": "^7.2.6",
"react-router-dom": "^6.0.1",
"react-scripts": "4.0.3",
"redux": "^4.1.2",
"redux-thunk": "^2.4.0",
Might be 2 reasons:
1- You forgotto recompile it if you are using webpack.
2- item.sku is undefined, null or not unique for each item
Currently I'm using react-markdown as my markdown component in my react project. Along with this I'm also using rehype-raw and remark-gfm. Whenever I run the project I get the following error:
The following is my package.json:
"dependencies": {
"next": "11.1.2",
"next-images": "^1.8.1",
"react": "17.0.2",
"react-dom": "17.0.2",
"react-markdown": "^7.0.1",
"rehype-raw": "^6.1.0",
"remark-gfm": "^2.0.0",
},
and my component:
import ReactMarkdown from "react-markdown";
import styles from "../styles/Home.module.css";
import remarkGfm from "remark-gfm";
import rehypeRaw from "rehype-raw";
export default function Home({ posts }) {
return (
<main className={styles.main}>
{posts &&
posts.map((image) => (
<div style={{ height: "100%" }}>
<ReactMarkdown
children={image.Content}
rehypePlugins={[rehypeRaw]}
/>
</div>
))}
</main>
);
}
Error shown in logs:
I experienced similar error too, then I've found this solution:
https://github.com/vercel/next.js/issues/25454#issuecomment-903513941
ReactMarkdown is an ESM module which means it cannot be required but rather imported. If you are actually importing in your code, it can be, that the transpiler (e.g.: Babel) changes this, hence the error. So this can be a possible cause of the error.
What you can do to solve this (also described in the issue commit by others):
npm i next-transpile-modules
In next.config.js do the following:
const withTM = require('next-transpile-modules')(['react-markdown']);
module.exports = withTM({
...restOfYourConfig
})
Import ReactMarkdown like this: import ReactMarkdown from 'react-markdown/react-markdown.min';
Other sources:
https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
https://nextjs.org/docs/messages/import-esm-externals
https://www.npmjs.com/package/next-transpile-modules
I'm using the following dependencies for React:
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-helmet": "^6.1.0",
"react-html-parser": "^2.0.2",
"react-icons": "^3.11.0",
"react-live-clock": "^4.0.5",
"react-router-dom": "^5.2.0",
"react-scripts": "3.4.3"
I have a menu where I load a component PageHowtos with and without a passed id:
<Route exact path="/howtos" render={() => <PageHowtos {...this.state.pageProps} />} />
<Route exact path="/howtos/:id" render={() => <PageHowtos {...this.state.pageProps} />} />
When I don't send an id in the URL, the page renders fine:
But when I send an id in the URL, the page receives the id, but it doesn't render correctly:
This is the PageHowtos.tsx page:
import React, { useEffect } from 'react';
import { useParams } from 'react-router-dom';
import { Helmet } from 'react-helmet';
import 'custom/styles/pageHowtos.scss';
const pageTitle = 'Web Developer > Howtos';
interface IProps {
changeSiteTitle: any
}
interface ParamTypes {
id: string
}
function PageHowtos(props: IProps) {
const { id } = useParams<ParamTypes>();
useEffect(() => {
props.changeSiteTitle(pageTitle);
}, []);
return (
<div className="page_howtos">
<Helmet>
<title>Howtos</title>
</Helmet>
<div>
This is the Howtos page. From URL, id = {id}
</div>
</div>
)
}
export default PageHowtos;
What could be causing the page not to render correctly when an id is passed in the URL?
ADDENDUM
It seems that when the id is passed, the page does not load the Bootstrap styles (!). Why could that be?
I found the answer. It had nothing to do with React-Router as such.
I was loading my Bootstrap files with a relative path and needed a preceding slash!
I have a problem with pigeon-maps in my reactjs-app. Using the mouse to navigate through the map works fine, but zooming with the scroll wheel does not work. However, a double-click zooms in the map, but then i have no way of zooming out again.
zoom and center are controlled variables.
<Map
limitBounds='edge'
center={center}
onBoundsChanged={res => {setCenter(res.center); setZoom(res.zoom)}}
zoom={zoom}
provider={provider}
onClick={changeLocation}
width={width}
height={height}
zoomOnMouseWheel={true}
animate={true}>
{renderMarkers()}
</Map>
Once rendered the component looks like this:
These are the dependencies i am using:
"dependencies": {
"#types/jest": "^25.1.4",
"#types/node": "^13.9.0",
"#types/react": "^16.9.23",
"#types/react-dom": "^16.9.5",
"axios": "^0.19.0",
"classnames": "^2.2.6",
"pigeon-maps": "^0.14.0",
"pigeon-overlay": "^0.2.3",
"react": "^16.11.0",
"react-cookie": "^4.0.3",
"react-dom": "^16.11.0",
"react-redux": "^7.1.3",
"react-router": "^5.1.2",
"react-router-dom": "^5.1.2",
"react-scripts": "^3.3.1",
"react-spring": "^8.0.27",
"react-use-clipboard": "1.0.2",
"reactjs-popup": "^1.5.0",
"redux": "^4.0.5",
"sockjs-client": "^1.4.0",
"stompjs": "^2.3.3",
"typescript": "^3.8.3"
}
If any of you have an Idea what might be causing my problem, i would be thankful if you shared it with me.
Best regards,
Koenigstein
edit: the whole code :
import React, {useEffect, useState} from 'react'
import Map from "pigeon-maps";
import "./editor.css";
export default function EditorInterface(props) {
const [selectedLocation, setSelectedLocation] = useState([0,0]);
const defaultWidth = window.innerWidth * 0.6;
const defaultHeight = window.innerHeight * .50 - 24;
const [zoom, setZoom] = useState(13);
const [width, setWidth] = useState(defaultWidth);
const [height, setHeight] = useState(defaultHeight);
const [center, setCenter] = useState([49.750049, 6.637275]);
const provider = (x, y, z) => {
const s = String.fromCharCode(97 + (x + y + z) % 3);
return `https://${s}.tile.openstreetmap.org/${z}/${x}/${y}.png`
};
const changeLocation = (e) =>{
setSelectedLocation(e.latLng);
};
return (
<div className="wrapper">
<div>
<Map
limitBounds='edge'
center={center}
onBoundsChanged={res => {setCenter(res.center); setZoom(res.zoom)}}
zoom={zoom}
provider={provider}
onClick={changeLocation}
width={width}
height={height}
zoomOnMouseWheel={true}
animate={true}>
</Map>
</div>
</div>
);
};
The component is being used here:
import React from 'react';
import {
BrowserRouter as Router,
Route} from "react-router-dom";
import AdminInterface from "./components/admininterface/AdminInterface";
import Watermark from "./components/watermark/Watermark";
import UserInterface from "./components/userinterface/UserInterface";
import EditorInterface from "./components/editorinterface/EditorInterface"
const App = () => {
return (
<Router>
<Route exact path={"/"} render={() =>
<UserInterface/>
}/>
<Route path={"/admin"} render={() =>
<AdminInterface/>
}/>
<Route path={"/scenarioCreator"} render={() =>
<EditorInterface/>
}/>
<Watermark/>
</Router>
);
};
export default App;
I will close this for now, because as DILEEP THOMAS pointed out, there is nothing wrong with the code, there seems to be something wrong with my project configuration or something else.
I will try to figure it out myself first.
According to pigeon-maps docs, you need to press (cmd/win) key while zooming with the mouse wheel
metaWheelZoom - Zooming with the mouse wheel only works when you hold down the meta (cmd/win) key. Defaults to false.
Docs here : https://github.com/mariusandra/pigeon-maps