Develop Reference

How to correctly use mavon-editor like markdown editor in Vue3.js apps?

I tried to install mavonEditor as markdown editor for my latest vue3.js app and also used vite for building vue.js apps.
First of all, I followed the document of mavonEditor, mavon component is not defined.
I installed mavon-editor(v2.10.4) using by npm.
And then, change the main.js like below.
import { createApp } from "vue";
import App from "./App.vue";
import "./assets/tailwind.css";
import mavonEditor from "mavon-editor";
import "mavon-editor/dist/css/index.css";
createApp(App).use(mavon).mount("#app");
and I tried to use editor component to App.vue like that.
<template>
<div>
<mavon-editor v-model="value" />
</div>
</template>
<script>
import { ref } from "#vue/reactivity";
export default {
setup() {
const value = ref("its my first mavon editor!");
return { value };
},
};
</script>
Open the browser(Chrome), but any items wasn't show.
Instead of editor, that error occurred in console.
Uncaught ReferenceError: mavon is not defined
I really want to know how to correctly use mavon-editor in Vue3.js.
Does anyone help me, please?

you can add this
app.use(mavonEditor)
and remove mavon from
createApp(App).use(mavon).mount("#app");
hope this help you solve the problem

React JS, props validation

New to React JS, props validation practise as follows:
import React from 'react';
import PropTypes from 'prop-types';
class App extends React.Component {
render() {
return (
<div>
<h3>String : {this.props.propstring}</h3>
</div>
);
}
}
App.propTypes = {
propstring : PropTypes.string
}
App.defaultProps = {
propstring : "My Name"
}
export default App;
import React, { component } from 'react';
import ReactDOM from 'react-dom';
import App from './AppProp.js';
ReactDOM.render(<App />,document.getElementById('root'));
Getting an error as:
TypeError: Class extends value undefined is not a constructor or null.
What am I missing here and how can I resolve the above error?

There are 2 possible problems. Most probably you're importing { component }(like you do in your index file, which is wrong), instead of { Component } somewhere in your code and trying to extend component which doesn't exist.
The other reason is that you might be circularly importing classes, but I doubt it. Also, is your file called AppProp.js?
Post the stack trace and it would also help if you post all the components you're using. Post your package.json as well, as you might be using wrong absolute paths.

The code is perfectly fine. I executed it on my local machine and it ran fine.
The only issue you may be facing is to with
circularly importing classes, which is apparently a limitation
Know more from the resource:
https://esdiscuss.org/topic/how-to-solve-this-basic-es6-module-circular-dependency-problem

How do I link my javascript files in react when converting from HTML,CSS,JS into JSX, CSS, JS?

I have a typical website created with HTML, CSS, Javascript and I'm trying to convert it into react.
I can convert my HTML into JSX pretty easily with an online converter and my CSS is the same, I just have to import it differently.
But now I'm confused about how to link up my javascript files. Because my HTML is now JSX which is in a Javascript file as well.
Normally in html this is all I need to do to link my java script and everything works:
<script type="text/javascript" src="js/main.js"></script>
How would I do this in react such that my JSX will have the same functionality as did my HTML?
Right now whether I try to import it from file location:
import './javascript/main.js'
It doesn't do anything. I'm not getting any errors. My JSX and CSS works fine and all I have for my CSS is (this import works fine):
import './css/main.css'
If it should work, please let me know, it must mean there's an error elsewhere that I have to sort out.
Thanks in advance

I don't think you can import js code on a react app, probably you have to create react-app first, then create its components and add you javascript code within these components, it´s pretty easy, i recomment you to read the documentation of react and see how it works. Hope it helped you.

You can include JavaScript functions inside JSX itself :
import React from 'react';
const Something=()=>{
// Your javascript functions :
return(
<div>
Your Html here
</div>
)
}
export default Something
// Or if You are using Class Component :
import React, { Component } from 'react';
class Something extends Component {
state = { }
// Your Javascript Functions
render() {
return (
<div>
Your HTML goes here
</div>
);
}
}
export default Something;
and if you want to import js file from another location you have to include export in your function:
export const Name=()=> {
}
and import:
import {Name} from '/location';

error with imports when using jquery plugin with react

I am trying to use jquery.infinitedrag to create a component in react. My code is here:
//Grid.js
import React from 'react'
import './jquery/jquery.min.js'
import './jquery/jquery-ui.min.js'
import './jquery/jquery-ui.min.css'
import './jquery/jquery.infinitedrag.js'
export default class Grid extends React.Component{
componentDidMount() {
$.infinitedrag("wall")
}
render() {
return(
<div id="wall"/>
)
}
}
This is supposed to work by making a div (identified by id) when react renders and then filling in an infinite grid later once the component mounts. The problem is, for some reason, jquery.infinitedrag is getting confused. Here is the error:
Failed to compile.
./src/jquery/jquery.infinitedrag.js
Line 108:4: Expected an assignment or function call and instead saw an expression no-unused-expressions
Line 277:4: 'jQuery' is not defined no-undef
My file structure looks like this:
src
-jquery
-jquery.min.js
-jquery-ui.min.js
-jquery-ui.min.css
-jquery.infinitedrag.min.js
-Grid.js
-misc other components and stuff
I am fairly new to javascript, so this is probably something dumb.

npm install jquery OR npm update to remove the second error.

Custom Uppy Plugin

I'm trying to make a custom Uppy React plugin but I'm getting the following error
'TypeError: Cannot call a class as a function'
import Plugin from 'uppy/src/core/Plugin';
export default class DropZone extends Plugin {
}
I am then consuming the component as follows:
import React from 'react';
import Uppy from 'uppy/lib/core/Core';
import DropZone from '../DropZone';
const uppy = new Uppy({ debug: true });
uppy.run();
export default class FileManager extends React.Component {
render() {
return (<DropZone uppy={uppy} />);
}
}
I've cut down the code for simplicity. I looked at the implementation of the uppy DragDrop plugin and followed its implement but still get the same error.
Has anyone had experience writing a react plugin for Uppy? as I'm lost as to how I can resolve this error.
Thanks

I've successfully created a plugin using the following import statement:
import { Uppy, Plugin, PluginOptions, UppyFile } from "#uppy/core";
It's not clear from your question whether you're using the npm package or have downloaded manually, but in my case I installed Uppy using:
npm i #uppy/core

First of all, in your "DropZone" plugin, you'll need to implement at least the install() and uninstall() methods (those get called by uppy).
Second, if you want to tell uppy to use your plugin, you need to do something like:
const uppy =
new Uppy({ debug: true })
.use(DropZone)
.run();
I suggest simply looking at the source code for other plugins to understand how they work, there are different kinds of Plugins - Providers for files management, GUI plugins for display in the Dashboard, etc...
Hope this helps