We Keep Coding

List from useContext is emptying right after pushing another element

While I am trying to add a new Subject to the specific Year and Quarter it is getting dragged into, my list is updating on screen, I am getting all of the element in the list, but when I try to check for things like duplicates inside the list (to not allow them), the list appears to be empty. I might suspect that it has something to do with the rerendering of the component without "fetching" the context again, but to be fair I have no clue what to try next to solve this.
import { Box, Typography } from "#mui/material";
import { useDrop } from "react-dnd";
import SubjectCard from "./SubjectCard";
import { Subject } from "../models/Subject";
import { useContext, useEffect } from "react";
import {
CurricullumContext,
CurricullumContextType,
} from "../context/CurricullumContext";
interface Props {
year: number;
quarter: number;
}
function QuarterComponent({ year, quarter }: Props) {
const yearProp = "year" + year;
const quarterProp = "quarter" + quarter;
const { curricullum, dispatch } = useContext(
CurricullumContext
) as CurricullumContextType;
const subjects = curricullum[yearProp]![quarterProp]!.subjects;
useEffect(() => {
console.log("subjects useEffect", subjects);
}, [curricullum]);
const [{ isOver }, drop] = useDrop(() => ({
accept: "subject",
drop: (item: Subject) => {
console.log("dropped", item);
console.log("subjects in drop", subjects);
addSubjectToYear(item);
},
collect: (monitor) => ({
isOver: !!monitor.isOver({ shallow: true }),
}),
}));
const addSubjectToYear = (subject: Subject) => {
console.log("subjects: ", curricullum[yearProp]![quarterProp]!.subjects);
if (!subjects.some((s: any) => s.courseName === subject.courseName)) {
dispatch({
type: "ADD_SUBJECT_TO_QUARTER",
payload: {
year: yearProp,
quarter: quarterProp,
subject: subject,
},
});
}
};
return (
<Box
display="flex"
flexDirection="column"
justifyContent="center"
alignItems="center"
ml={2}
>
<Typography variant="h5">Quartile {quarter}</Typography>
<Box
display="flex"
flexDirection="column"
width={200}
height={400}
border={isOver ? "2px solid red" : "2px solid black"}
ref={drop}
bgcolor={isOver ? "lightsalmon" : "white"}
>
{subjects.length > 0 &&
subjects.map((subject: Subject) => <SubjectCard subject={subject} />)}
{subjects.length === 0 && (
<Typography variant="h6">Drop subjects here</Typography>
)}
</Box>
</Box>
);
}
export default QuarterComponent;
I tried adding a console.log using useEffect to try and capture the list at every render and on each drop of a new item i get around 16 console.logs, but the interesting part is that always the first log shows the list with all of the items that it should have, onlyt after the first one all of the rest are empty arrays.
QuarterComponent.tsx:28 subjects useEffect (2) [{…}, {…}]0: {id: 1, language: 'English', credits: 5, courseName: 'OOP', version: '1', …}1: {id: 2, language: 'English', credits: 5, courseName: 'Databases', version: '2', …}length: 2[[Prototype]]: Array(0)
QuarterComponent.tsx:28 subjects useEffect []
QuarterComponent.tsx:28 subjects useEffect []

How do i use props & map function to insert image urls for cards with logos using React?

I am working on a personal project where NFL Data is displayed by team. I am just learning React and would like to know how to use props and map image urls from an array to display multiple NFL logo cards. I have made a similar website using strictly css, html, and javascript but need to do it in react, anyways, this is what I have:
Home.js
import React from "react"
import { Link} from "react-router-dom"
import Box from '#material-ui/core/Box';
const teams = [
{
id: 1,
teamName: "Kansas City Cheifs",
urlImage: "public/chiefs_logo.jpg"
},
{
id: 2,
teamName: "Cincinatti Bengals",
urlImage: "public/Bengals.jpg"
},
{
id: 3,
teamName: "Denver Broncos",
urlImage: "public/Denver-Broncos-symbol.jpeg"
},
{
id: 4,
teamName: "Carolina Panthers",
urlImage: "public/panthers.png"
}
];
export default function Home(props) {
return (
<div className="Team-Box">
const teamCards = teams.map(team => )
<Box className="Box" key={teams.id} background-image={props.urlImage}/>
<Box className="Box" background-image={props.urlImage}/>
<Link to="/Home"></Link>
</div>
)
}
What it looks like so far
[What I want it to look like][2]
[2]: https://i.stack.imgur.com/KK0tw.jpg, except for all 32 NFL teams

Inside of your return you want something like this.
return (
<div>
{teams.map((team) => (
<div key={team.id} className='Team-Box'>
<Box
className='Box'
style={{ backgroundImage: `url(${team.imageUrl})` }}
/>
</div>
))}
<Link to='/Home'></Link>
</div>
);
Here is an idea of what this would look like if you wanted to pass some data as props to a Card component responsible for displaying the information on each team.
import { useState } from 'react';
const initialTeams = [
{
id: 1,
teamName: 'Kansas City Chiefs',
urlImage: 'public/chiefs_logo.jpg',
},
{
id: 2,
teamName: 'Cincinatti Bengals',
urlImage: 'public/Bengals.jpg',
},
{
id: 3,
teamName: 'Denver Broncos',
urlImage: 'public/Denver-Broncos-symbol.jpeg',
},
{
id: 4,
teamName: 'Carolina Panthers',
urlImage: 'public/panthers.png',
},
];
const Card = ({ imageUrl, teamName }) => (
<div className='team-card' style={{ backgroundImage: `url(${imageUrl})` }}>
{teamName}
</div>
);
const Home = () => {
const [teams, setTeams] = useState(initialTeams);
return (
<div>
{teams.map(({ id, imageUrl, teamName }) => (
<Card key={id} imageUrl={imageUrl} teamName={teamName} />
))}
</div>
);
};
export default Home;

In React SharePoint WebPart what are the differences between using 'html-react-parser' & using 'dompurify eslint-plugin-risxss' to securely show HTML

I am trying to build a React.js SharePoint modern web part, which have the following capabilities:-
Inside the Web Part settings page >> there are 2 fields named as "Who We Are" & "Our Value" which allow the user to enter HTML.
The web part will render 2 buttons "Who We Are" & "Our Value" >> and when the user clicks on any button >> a Popup will be shown with the entered HTML code in step-1
Something as follow:-
But to be able to render HTML code as Rich-Text inside my Web Part, i have to use the dangerouslySetInnerHTML attribute inside the .tsx file. as follow:-
import * as React from 'react';
import { useId, useBoolean } from '#fluentui/react-hooks';
import {
getTheme,
mergeStyleSets,
FontWeights,
Modal,
IIconProps,
IStackProps,
} from '#fluentui/react';
import { IconButton, IButtonStyles } from '#fluentui/react/lib/Button';
export const MYModal2 = (myprops) => {
const [isModalOpen, { setTrue: showModal, setFalse: hideModal }] = useBoolean(false);
const [isPopup, setisPopup] = React.useState(true);
const titleId = useId('title');
React.useEffect(() => {
showModal();
}, [isPopup]);
function ExitHandler() {
hideModal();
setisPopup(current => !current)
myprops.handler();
}
return (
<div>
<Modal
titleAriaId={titleId}
isOpen={isModalOpen}
onDismiss={ExitHandler}
isBlocking={true}
containerClassName={contentStyles.container}
>
<div className={contentStyles.header}>
<span id={titleId}>Modal Popup</span>
<IconButton
styles={iconButtonStyles}
iconProps={cancelIcon}
ariaLabel="Close popup modal"
onClick={ExitHandler}
/>
</div>
<div className={contentStyles.body}>
<p dangerouslySetInnerHTML={{__html:myprops.OurValue}}>
</p>
</div>
</Modal>
</div>
);
};
const cancelIcon: IIconProps = { iconName: 'Cancel' };
const theme = getTheme();
const contentStyles = mergeStyleSets({
container: {
display: 'flex',
flexFlow: 'column nowrap',
alignItems: 'stretch',
},
header: [
// eslint-disable-next-line deprecation/deprecation
theme.fonts.xLarge,
{
flex: '1 1 auto',
borderTop: '4px solid ${theme.palette.themePrimary}',
color: theme.palette.neutralPrimary,
display: 'flex',
alignItems: 'center',
fontWeight: FontWeights.semibold,
padding: '12px 12px 14px 24px',
},
],
body: {
flex: '4 4 auto',
padding: '0 24px 24px 24px',
overflowY: 'hidden',
selectors: {
p: { margin: '14px 0' },
'p:first-child': { marginTop: 0 },
'p:last-child': { marginBottom: 0 },
},
},
});
const stackProps: Partial<IStackProps> = {
horizontal: true,
tokens: { childrenGap: 40 },
styles: { root: { marginBottom: 20 } },
};
const iconButtonStyles: Partial<IButtonStyles> = {
root: {
color: theme.palette.neutralPrimary,
marginLeft: 'auto',
marginTop: '4px',
marginRight: '2px',
},
rootHovered: {
color: theme.palette.neutralDark,
},
};
And to secure the dangerouslySetInnerHTML, i did the following steps:-
1- Inside my Node.Js CMD >> i run this command inside my project directory:-
npm install dompurify eslint-plugin-risxss
2- Then inside my above .tsx i made the following modifications:-
I added this import import { sanitize } from 'dompurify';
An I replaced this unsafe code <p dangerouslySetInnerHTML={{__html:myprops.OurValue}}></p> with this <div dangerouslySetInnerHTML={{ __html: sanitize(myprops.OurValue) }} />
So I have the following question:-
Now my approach (of using sanitize(myprops.OurValue) will/should securely render HTML as Rich-Text inside the popup since i am using the sanitize function which is part of the dompurify eslint-plugin-risxss. but i read another approach which mentioned that to securely render HTML as Rich-Text inside the popup, we can use the html-react-parser package as follow {parse(myprops.OurValue)}. So what are the differences between using 'html-react-parser' & using 'dompurify eslint-plugin-risxss' to securely render an HTML code as Rich-Text inside the React web part's popup?
Here is my Full web part code:-
inside the MyModalPopupWebPart.ts:-
import * as React from 'react';
import * as ReactDom from 'react-dom';
import { Version } from '#microsoft/sp-core-library';
import {
IPropertyPaneConfiguration,
PropertyPaneTextField
} from '#microsoft/sp-property-pane';
import { BaseClientSideWebPart } from '#microsoft/sp-webpart-base';
import * as strings from 'MyModalPopupWebPartStrings';
import MyModalPopup from './components/MyModalPopup';
import { IMyModalPopupProps } from './components/IMyModalPopupProps';
export interface IMyModalPopupWebPartProps {
description: string;
WhoWeAre: string;
OurValue:string;
}
export default class MyModalPopupWebPart extends BaseClientSideWebPart<IMyModalPopupWebPartProps> {
public render(): void {
const element: React.ReactElement<IMyModalPopupProps> = React.createElement(
MyModalPopup,
{
description: this.properties.description,
WhoWeAre: this.properties.WhoWeAre,
OurValue: this.properties.OurValue
}
);
ReactDom.render(element, this.domElement);
}
protected onDispose(): void {
ReactDom.unmountComponentAtNode(this.domElement);
}
protected get dataVersion(): Version {
return Version.parse('1.0');
}
protected getPropertyPaneConfiguration(): IPropertyPaneConfiguration {
return {
pages: [
{
header: {
description: strings.PropertyPaneDescription
},
groups: [
{
groupName: strings.BasicGroupName,
groupFields: [
PropertyPaneTextField('WhoWeAre', {
label: "who We Are",
multiline: true
}),
PropertyPaneTextField('OurValue', {
label: "Our value"
}), PropertyPaneTextField('description', {
label: "Description",
multiline: true
}),
]
}
]
}
]
};
}
}
inside the MyModalPopup.tsx:-
import * as React from 'react';
import { IMyModalPopupProps } from './IMyModalPopupProps';
import { DefaultButton } from '#fluentui/react/lib/Button';
import { MYModal } from './MYModal';
import { MYModal2 } from './MYModal2';
interface IPopupState {
showModal: string;
}
export default class MyModalPopup extends React.Component<IMyModalPopupProps, IPopupState> {
constructor(props: IMyModalPopupProps, state: IPopupState) {
super(props);
this.state = {
showModal: ''
};
this.handler = this.handler.bind(this);
this.Buttonclick = this.Buttonclick.bind(this);
}
handler() {
this.setState({
showModal: ''
})
}
private Buttonclick(e, whichModal) {
e.preventDefault();
this.setState({ showModal: whichModal });
}
public render(): React.ReactElement<IMyModalPopupProps> {
const { showModal } = this.state;
return (
<div>
<DefaultButton onClick={(e) => this.Buttonclick(e, 'our-value')} text="Our Value" />
{ showModal === 'our-value' && <MYModal2 OurValue={this.props.OurValue} myprops={this.state} handler={this.handler} />}
<DefaultButton onClick={(e) => this.Buttonclick(e, 'who-we-are')} text="Who We Are" />
{ showModal === 'who-we-are' && <MYModal WhoWeAre={this.props.WhoWeAre} myprops={this.state} handler={this.handler} />}
</div>
);
}
}

Actually, html-react-parser returns ReactJs object, and its return type is like React.createElement or like type of called JSX.
Using DOMPurify.sanitize will return safe pure HTML elements which those are different to the object that html-react-parser returns. the risxss ESLint plugin will force you to use sanitizing with any kind of sanitize function or library, that I left an answer to your other question to how to Sanitize your string HTML.
Eventually, using sanitizing is better because is the html-react-parser will convert your string HTML to ReactJs object with some tiny changes that would be dangerous because it is possible to have some script of string HTML in the project and it maybe will be harmful it just remove the onclick or onload, etc, from HTML tags but sanitizing will remove all possible harmful tags. also sanitizing will receive configuration, which means you can have your own options for sanitizing.

onClick event in React app not working on iOS devices

I’m having a bit of an issue with an onClick event (in the Geography component, which is a SVG) not working on iOS devices (seems to work fine when I’ve tested on other phones). I’ve done some reading and the consensus seemed to be this was a known bug, but by adding cursor: ‘pointer’ the issue should be resolved, however this hasn’t made a difference in my case so I think it must be a different issue. Any ideas?
import React, { memo, Component } from 'react';
import { ZoomableGroup, ComposableMap, Geographies, Geography } from "react-simple-maps";
import geoUrl from "../data/topo.json";
import Country from './Country'
import { CSSTransition, SwitchTransition } from "react-transition-group";
class Map extends Component {
constructor(props){
super(props);
this.state = {
country: "",
dish: "",
description: "",
photo: "",
recipe: "",
selected: false,
}
}
handleEnter(country, dish, description, photo, recipe){
this.setState({
country: country,
dish: dish,
description: description,
photo: photo,
recipe: recipe
})
}
render(){
const { country, dish, description, photo, recipe, selected } = this.state;
const countries = geoUrl.objects.ne_50m_admin_0_countries.geometries;
return(
<SwitchTransition>
<CSSTransition
classNames="transition"
transitionAppearTimeout={50000}
timeout={500000}
key={ selected }
in={ selected }
unmountOnExit
appear
>
<>
<section className="map" id="home">
<header className="header">
<button className="headButton" onClick={ this.handleAbout }><a className="subHeading" href="#about">About</a></button>
<h1 className="heading">Food Atlas</h1>
<button className="headButton" onClick={ this.handleList }><a className="subHeading" href="#list">List</a></button>
</header>
<div className="container">
<ComposableMap width={1200} style={{ width: "100%" }} data-tip="" projectionConfig={{ scale: 200 }} >
<ZoomableGroup>
<Geographies geography={geoUrl}>
{({ geographies }) =>
geographies.map(geo =>
<a href="#country" key={ geo.properties.NAME }>
<Geography
key={geo.rsmKey}
geography={geo}
onMouseOver={() => {
const { NAME } = geo.properties;
this.props.setTooltipContent(`${NAME}`);
}}
onMouseOut={() => {
this.props.setTooltipContent("");
}}
onClick={() => {
const { NAME, DISH, DESCRIPTION, PHOTO, RECIPE } = geo.properties;
this.handleEnter(NAME, DISH, DESCRIPTION, PHOTO, RECIPE);
}}
onTouchStart={() => {
const { NAME, DISH, DESCRIPTION, PHOTO, RECIPE } = geo.properties;
this.handleEnter(NAME, DISH, DESCRIPTION, PHOTO, RECIPE);
}}
fill="#44BBA4"
stroke="#E94F37"
strokeWidth="0.5"
style={{
default: {
outline: 'none'
},
hover: {
fill: "#E94F37",
outline: 'none'
},
pressed: {
outline: 'none'
},
cursor:'pointer'
}}
/>
</a>
)
}
</Geographies>
</ZoomableGroup>
</ComposableMap>
</div>
</section>
</>
</CSSTransition>
</SwitchTransition>
);
}
}
export default memo(Map);

Using JsonSchemaForm on change to update field's content

I am trying to use JsonSchema-Form component but i ran into a problem while trying to create a form that, after choosing one of the options in the first dropdown a secondary dropdown should appear and give him the user a different set o options to choose depending on what he chose in the first dropdown trough an API call.
The thing is, after reading the documentation and some examples found here and here respectively i still don't know exactly how reference whatever i chose in the first option to affect the second dropdown. Here is an example of what i have right now:
Jsons information that are supposed to be shown in the first and second dropdowns trough api calls:
Groups: [
{id: 1,
name: Group1}
{id: 2,
name: Group2}
]
User: [User1.1,User1.2,User2.1,User2.2,User3.1,User3.2, ....]
If the user selects group one then i must use the following api call to get the user types, which gets me the the USER json.
Component That calls JSonChemaForm
render(){
return(
<JsonSchemaForm
schema={someSchema(GroupOptions)}
formData={this.state.formData}
onChange={{}}
uiSchema={someUiSchema()}
onError={() => {}}
showErrorList={false}
noHtml5Validate
liveValidate
>
)
}
SchemaFile content:
export const someSchema = GroupOptions => ({
type: 'object',
required: [
'groups', 'users',
],
properties: {
groups: {
title: 'Group',
enum: GroupOptions.map(i=> i.id),
enumNames: GroupOptions.map(n => n.name),
},
users: {
title: 'Type',
enum: [],
enumNames: [],
},
},
});
export const someUISchema = () => ({
groups: {
'ui:autofocus': true,
'ui:options': {
size: {
lg: 15,
},
},
},
types: {
'ui:options': {
size: {
lg: 15,
},
},
},
});
I am not really sure how to proceed with this and hwo to use the Onchange method to do what i want.

I find a solution for your problem.There is a similar demo that can solve it in react-jsonschema-form-layout.
1. define the LayoutField,this is part of the demo in react-jsonschema-form-layout.To make it easier for you,I post the code here.
Create the layoutField.js.:
import React from 'react'
import ObjectField from 'react-jsonschema-form/lib/components/fields/ObjectField'
import { retrieveSchema } from 'react-jsonschema-form/lib/utils'
import { Col } from 'react-bootstrap'
export default class GridField extends ObjectField {
state = { firstName: 'hasldf' }
render() {
const {
uiSchema,
errorSchema,
idSchema,
required,
disabled,
readonly,
onBlur,
formData
} = this.props
const { definitions, fields, formContext } = this.props.registry
const { SchemaField, TitleField, DescriptionField } = fields
const schema = retrieveSchema(this.props.schema, definitions)
const title = (schema.title === undefined) ? '' : schema.title
const layout = uiSchema['ui:layout']
return (
<fieldset>
{title ? <TitleField
id={`${idSchema.$id}__title`}
title={title}
required={required}
formContext={formContext}/> : null}
{schema.description ?
<DescriptionField
id={`${idSchema.$id}__description`}
description={schema.description}
formContext={formContext}/> : null}
{
layout.map((row, index) => {
return (
<div className="row" key={index}>
{
Object.keys(row).map((name, index) => {
const { doShow, ...rowProps } = row[name]
let style = {}
if (doShow && !doShow({ formData })) {
style = { display: 'none' }
}
if (schema.properties[name]) {
return (
<Col {...rowProps} key={index} style={style}>
<SchemaField
name={name}
required={this.isRequired(name)}
schema={schema.properties[name]}
uiSchema={uiSchema[name]}
errorSchema={errorSchema[name]}
idSchema={idSchema[name]}
formData={formData[name]}
onChange={this.onPropertyChange(name)}
onBlur={onBlur}
registry={this.props.registry}
disabled={disabled}
readonly={readonly}/>
</Col>
)
} else {
const { render, ...rowProps } = row[name]
let UIComponent = () => null
if (render) {
UIComponent = render
}
return (
<Col {...rowProps} key={index} style={style}>
<UIComponent
name={name}
formData={formData}
errorSchema={errorSchema}
uiSchema={uiSchema}
schema={schema}
registry={this.props.registry}
/>
</Col>
)
}
})
}
</div>
)
})
}</fieldset>
)
}
}
in the file, you can define doShow property to define whether to show another component.
Next.Define the isFilled function in JsonChemaForm
const isFilled = (fieldName) => ({ formData }) => (formData[fieldName] && formData[fieldName].length) ? true : false
Third,after you choose the first dropdown ,the second dropdown will show up
import LayoutField from './layoutField.js'
const fields={
layout: LayoutField
}
const uiSchema={
"ui:field": 'layout',
'ui:layout': [
{
groups: {
'ui:autofocus': true,
'ui:options': {
size: {
lg: 15,
},
},
}
},
{
users: {
'ui:options': {
size: {
lg: 15,
},
},
doShow: isFilled('groups')
}
}
]
}
...
render() {
return (
<div>
<Form
schema={schema}
uiSchema={uiSchema}
fields={fields}
/>
</div>
)
}