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How to get array of objects in javascript from an array of dictionaries in python?

I'm trying to use an array of dictionaries in python as arguement to a custom dash component and use it as array of objects
in python :
audioList_py = [
{
"name": "random",
"singer": 'waveGAN\'s music',
"cover":
'link_1.jpg',
"musicSrc":
'link_1.mp3',
},
{
"name": "random",
"singer": 'waveGAN\'s music',
"cover":
'link_2.jpg',
"musicSrc":
'link_2.mp3',
},
... etc
]
in Javascript:
audioList1_js = [
{
name: "random",
singer: 'waveGAN\'s music',
cover:'link_1.jpg',
musicSrc: 'link_1.mp3',
},
{
name: "random",
singer: 'waveGAN\'s music',
cover: 'link_2.jpg',
musicSrc: 'link_2.mp3',
},
... etc
]
Here is snippet of javascript code of the dash custom component:
export default class MusicComponent extends Component {
render() {
const {id, audioLists} = this.props;
return (
<div>
<h1>{id}</h1>
<ReactJkMusicPlayer audioLists={audio_list}/>,
</div>
);
}
}
MusicComponent.defaultProps = {};
MusicComponent.propTypes = {
/**
* The ID used to identify this component in Dash callbacks.
*/
audios: PropTypes.array,
id: PropTypes.string,
};
And using the generated component in python:
app = dash.Dash(__name__)
app.layout = html.Div([
music_component.MusicComponent(audios=audioList_py),
html.Div(id='output'),
... etc
])
But I got :
TypeError: The `music_component.MusicComponent` component (version 0.0.1) received an unexpected keyword argument: `audios`Allowed arguments: id
What I am doing wrong ?
Any help or advice will be appreciated, Thanks a lot.

Make sure you run npm run build after you make a change to your custom React component. With those proptypes you shouldn't get that error. If I remove the audios proptype I can reproduce that error.
Besides that you pass a value to the audios property:
music_component.MusicComponent(audios=audioList_py)
but you try to retrieve audioLists from props:
const {id, audioLists} = this.props;
Change this to:
const {id, audios} = this.props;
Demo
export default class MusicComponent extends Component {
render() {
const {id, audios} = this.props;
return (
<div>
<h1>{id}</h1>
<ReactJkMusicPlayer audioLists={audios} />
</div>
);
}
}
MusicComponent.defaultProps = {};
MusicComponent.propTypes = {
/**
* The ID used to identify this component in Dash callbacks.
*/
id: PropTypes.string,
audios: PropTypes.array,
};

Issue fixed, I should run : npm run build:backends to generate the Python, R and Julia class files for the components, but instead I was executing npm run build:js and this command just generate the JavaScript bundle (which didn't know about the new props).
And set the audios property in the component to be like so:
MusicComponent.defaultProps = {audios: audioList1};
MusicComponent.propTypes = {
id: PropTypes.string,
audios: PropTypes.arrayOf(PropTypes.objectOf(PropTypes.string)).isRequired
};

Babel expects "," where there should be a "."?

So, the following implementation works just fine to read JSON data and turn it into rendered components - until I try to add the children. Then, it spits out an error.
function:
const catalogRenderer = (config) => {
if (typeof KeysToComponentMap[config.component] !== "undefined") {
return React.createElement(
KeysToComponentMap[config.component],
{
key: config.key,
title: config.title
},
{
config.children && config.children.map(c => catalogRenderer(c))
}
);
}
}
error:
app.js:134 Uncaught Error: Module build failed (from ./node_modules/babel-loader/lib/index.js)
"...Scripts/CatalogRenderer.js: Unexpected token, expected "," (25:14)"
console:
},
24 | {
> 25 | config.children && config.children.map(c => catalogRenderer(c))
| ^
26 | }
27 | );
28 | }
I'm using react as part of an electron application, it's a long story about all the moving parts, but everything else so far has worked just fine. In the editor, if I move to the preceding { from that mysteriously disliked . on line 25, it's highlighting the period as if this should somehow close the bracket.
Is there something I'm not understanding about the syntax here? The same thing happens if I attempt to just map and render the children like so:
{
config.children.map(c => catalogRenderer(c))
}
I've tried enclosing the whole statement in brackets, curly braces, parentheses--no matter what I do, babel seems to expect a comma, but giving it a comma obviously doesn't help. Any idea what I'm doing wrong?
eta: This is the JSON object I'm attempting to render from:
const catConfig = {
catalog: [
{
component: 'pen',
title: `B.C. Palmer`,
key: `B.C.PalmerPen`,
children: `A child string`
},
{
component: 'content',
key: `B.C.PalmerWorldList`,
children: [
{
component: 'world',
title: `Rismere`,
key: `RismereWorld`
},
{
component: 'content',
key: `RismereSeries`,
children: [
{
component: 'series',
title: `The Eidolon War`,
key: `TheEidolonWarSeries`
},
{
component: 'content',
key: `TheEidolonWarBooks`,
children: [
{
component: 'book',
title: `Magic's Heart`,
key: `MagicsHeartBook`
},
{
component: 'book',
title: `Magic's Fury`,
key: `MagicsFuryBook`
},
{
component: 'book',
title: `Magic's Grace`,
key: `MagicsGraceBook`
}
]
}
]
}
]
},
{
component: 'pen',
title: `Simon Strange`,
key: `SimonStrangePen`
}
]
}
This JSON will be generated via a database call, and written each time the database is updated, and update the state of the 'catalog' component.
So, for example, the second object in the catalog array above is a container which, when the first 'pen' component is clicked, becomes visible and shows a list of 'world' components (in this case, just the one.) However, the function only successfully renders any 'parent' components--if I take out the curly braces at lines 24 and 26, it simply skips them but doesn't error.
The components are composed of button elements and a div (content). The buttons will likely become Link element when I get this working, but the original version was written in vanilla javascript, I haven't implemented routing with the catalog yet. So, the pen component for example:
import React from 'react'
export default penButton => {
return(
<button className="catalogItem pen">
<img src="src/icons/catPenName.png" className="catalogIcon"/>
<p className="contentLabel">{penButton.title}</p>
</button>
)
}
Is a top level component, and gets rendered just fine. It's next sibling (and the next sibling of any button except a book) is content:
import React from 'react'
export default contentList => {
return(
<div className="contentList">
</div>
)
}
contentList is just a div with the contentList class, which handles visibility and animation. Should I have a place for the "children" key in JSON to populate the children of content?

When you want to render multipile children elemen'ts into your react component, you need to pass each child as a seperate parameter.
See this answer as an example:
how to render multiple children without JSX
so your solution should be to use spread syntax.
here is an example:
const catalogRenderer = (config) => {
if (typeof KeysToComponentMap[config.component] !== "undefined") {
let childs = [];
if (config.children) {
childs = config.children.map(c => catalogRenderer(c));
}
return React.createElement(
KeysToComponentMap[config.component],
{
key: config.key,
title: config.title
},
...childs
);
}
}

Well, that was simple and a little silly. I updated the content component to:
import React from 'react'
export default contentList => {
return(
<div className="contentList">
{contentList.children} <---- added
</div>
)
}
Content didn't have a place to put children. Obviously.

Uncaught ReferenceError: $ is not defined (react)?

Hello I am following a tutorial on learning React and right out of the gate am getting a undefined reference error. I am calling all the dependent libraries locally so I don't think it is a problem with hte libraries not fully loading. I am a newbie to React so I'm not sure what the issue is
I tried renaming the variables and looked through all the similar issues with reference errors posted here
<div id="entry-point"></div>
<script src="lib/react.js"></script>
<script src="lib/react-dom.js"></script>
<script src="lib/babel.js"></script>
<script>
console.log('notes')
let notes = [
{ id: 1, content: "Learn React" },
{ id: 2, content: "Get Lunch" },
{ id: 3, content: "Learn React Native" }
]
class Note extends React.Component {
render() {
return React.createElement("li", {}, this.props.content)
}
}
class NotesList extends React.Component {
renderNote(note) {
return React.createElement(Note, { key: note.id, content: note.content })
}
render() {
let { notes } = this.props
return React.createElement("ul", {}, notes.map(this.renderNote, this))
}
}
class App extends React.Component {
render() {
let { notes } = notes
return React.createElement(
"section",
{},
React.createElement("h1", {}, "You have ", notes.length, " notes"),
React.createElement(NotesList, { notes: notes })
)
}
}
ReactDOM.render(
React.createElement(App, { notes: notes }),
document.getElementById("entry-point")
)
</script>
This is the error message I'm getting:
ReferenceError: Cannot access 'notes' before initialization
at App.render (scratch.html:47)
at h (react-dom.js:130)
at beginWork (react-dom.js:134)
at d (react-dom.js:158)
at f (react-dom.js:159)
at g (react-dom.js:159)
at t (react-dom.js:167)
at x (react-dom.js:166)
at r (react-dom.js:164)
at v (react-dom.js:163)

ReferenceError: Cannot access 'notes' before initialization
at App.render (scratch.html:47)
So your compiler is telling you where your problem is, in this case line 47 inside your render function.
Then it is telling you that it cannot access before initialization. You are attempting to destructure with this syntax:
let { notes } = notes
This is essentially saying "let notes = notes.notes;" Since notes is an array and doesn't have a property called notes - you are receiving an error. You already have notes defined in the scope, so try deleting that line and seeing what happens.

Setting up Slate.js

I am trying to set up a simple slate.js editor, with the following code:
import { Editor } from 'slate-react'
import { Value } from 'slate'
const initialValue = Value.fromJSON({
document: {
nodes: [
{
object: 'block',
type: 'paragraph',
nodes: [
{
object: 'text',
leaves: [
{
text: 'A line of text in a paragraph.',
},
],
},
],
},
],}, });
// Define our app...
class App extends React.Component {
// Set the initial value when the app is first constructed.
state = {
value: initialValue,
};
// On change, update the app's React state with the new editor value.
onChange = ({ value }) => {
this.setState({ value })
} // Render the editor.
render() {
return <Editor value={this.state.value} onChange={this.onChange} />
}
}
export default App
I simply copy pasted the code from the slate.js walkthorugh, but I get the following error:
./src/App.js
Syntax error: Unexpected character '​' (34:0)
32 | this.setState({ value })
33 | }
> 34 | ​
| ^
35 | // Render the editor.
36 | render() {
37 | return <Editor value={this.state.value} onChange={this.onChange} />
It´s my first time both using react and slate, I just wanted to get a feel for it. I hope you can help me explaining whats wrong :)

I don't know if you've solved it already. But I just faced that problem, I think there's a leftover character from when you copied it from their documentation.
Try removing the whitespace completely between the end of the block and the comment and then add them to your liking again, it should work!

How to format text and embed a video with Quill?

I started to integrate a WYSIWYG into a blog project, I'm using Quill for this (I had no experience with it before). I was able to customize my editor the way it was required, what I don't understand is how to deal with text format and embed videos. I have two fields in my post form, "preview" and "content" (two quill editors) while introducing the text I can give format to it (header, italic, underline...etc) and when click the embed video option the editor allows me to add the link and visualize the embed video in that moment. When I press my save button it stores the post in my db but in my single post page I visualize all the fields without format (header, italic, underline...etc) and also no embed video. How can I give format and show the video? Any help would be appreciated.
I read the Quill documentation and tried to understand how to deal with this using deltas but I don't know how to make this work.
I'm using Meteor + React, this is my code (I'll show only relevant code):
This is my lib, quill.jsx
import React, { Component } from 'react';
import QuillLib from './vendor/quill.js';
import { ud } from '/helpers/lib/main.jsx';
class Quill extends Component {
constructor(props) {
super(props);
this.id = ud.shortUID();
}
componentDidMount() {
const that = this;
const toolbarOptions = [
[{ font: [] }],
[{ header: 1 }, { header: 2 }],
[{ header: [1, 2, 3, 4, 5, 6, false] }],
[{ align: [] }],
['bold', 'italic', 'underline', 'strike'],
['blockquote', 'code-block'],
[{ script: 'sub' }, { script: 'super' }],
[{ indent: '-1' }, { indent: '+1' }],
[{ color: [] }, { background: [] }],
['video'],
['image'],
];
const quill = new QuillLib(`#quill-editor-container-${this.id}`, {
modules: {
toolbar: toolbarOptions,
},
theme: 'snow',
});
const content = this.props.content;
quill.setContents(content);
quill.on('text-change', (delta) => {
if (that.props.onChange) {
that.props.onChange(quill);
}
});
}
render() {
return (
<div className="wysiwyg-wrapper">
<div id={`quill-editor-container-${this.id}`}></div>
</div>
);
}
}
export default Quill;
This is my input form component, list.jxs
import { Meteor } from 'meteor/meteor';
import { PostSchema } from '/modules/blog/lib/collections.jsx';
import Quill from '/modules/quill/client/main.jsx';
export class BlogCategory extends Component {
constructor(props) {
super(props);
this.state = {
post: {
content: '',
preview: '',
},
};
this.onPreviewChange = this.onPreviewChange.bind(this);
this.onContentChange = this.onContentChange.bind(this);
}
onPreviewChange(content) {
this.state.post.preview = content.getText();
this.setState(this.state);
}
onContentChange(content) {
this.state.post.content = content.getText();
this.setState(this.state);
}
save() {
const content = this.state.post.content;
const preview = this.state.post.preview;
const post = new PostSchema();
post.set({
content,
preview,
});
if (post.validate(false)) {
const id = post.save();
}
console.log(post.getValidationErrors(false));
}
renderCreatePostForm() {
let content;
if (this.state.showForm) {
content = (
<form action="">
<Quill
content={this.state.post.preview}
onChange={this.onPreviewChange}
/>
<Quill
content={this.state.post.content}
onChange={this.onContentChange}
/>
</form>
);
}
return content;
}
render() {
let content = (
<div className="col-xs-12">
{this.renderActions()}
</div>
);
if (!this.props.ready) {
content = <p>LOADING...</p>;
}
return content;
}
}
export default createContainer(() => {
const handleValidPost = Meteor.subscribe('posts');
return {
ready: handleValidPost.ready(),
posts: PostSchema.find({}).fetch(),
};
}, BlogCategory);
And finally my collections.jsx
import { Mongo } from 'meteor/mongo';
export const PostCollection = new Mongo.Collection('Posts');
export const PostSchema = Astro.Class({
name: 'PostSchema',
collection: PostCollection,
fields: {
content: {
validator : Validators.and([
Validators.required(),
Validators.string(),
Validators.minLength(3)
])
},
preview: {
validator : Validators.and([
Validators.required(),
Validators.string(),
Validators.minLength(3)
])
},
}
});

While getting Quill contents by getText, you lost your text format and video information. Using getText, all non-string data will be omitted. Quill data are defined as Delta (which is a JSON object).
You can fix this by updating your onPreviewChange and onContentChange to use getContents instead of getText. Save these Delta to DB and load it again.
onPreviewChange(content) {
this.state.post.preview = content.getContents();
this.setState(this.state);
}
onContentChange(content) {
this.state.post.content = content.getContents();
this.setState(this.state);
}