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React issue with show / hiding elements

This project is using React.
The goal is that when the maximize icon is clicked on the the Editor component, the Preview component will be hidden. When the maximize icon is clicked on the Preview component, the Editor component will be hidden.
The problem is, when I click the maximize icon on the Editor component, the only thing that displays is the text "not found." But the Preview maximize icon works when clicked.
I logged state to the console so I know that the state is updating when the editor button is clicked, but I can't figure out what is wrong with the way I am rendering the Editor element.
Codepen link: https://codepen.io/Jamece/pen/Exbmxmv
Thank you for any help you can provide.
import * as marked from "https://cdn.skypack.dev/marked#4.0.12";
class Application extends React.Component {
constructor(props) {
super(props);
this.state = {
editorOnly: false,
previewOnly: false,
inputValue: "",
outputValue: ""
};
this.handleChange = this.handleChange.bind(this);
this.editorChange = this.editorChange.bind(this);
this.previewChange = this.previewChange.bind(this);
}
handleChange(event) {
this.setState({
inputValue: event.target.value
});
}
//changes view to editorOnly when editor maximize button is clicked then back to full view when clicked again
editorChange() {
this.setState((state) => {
if (state.editorOnly === false) {
return { editorOnly: true };
} else {
return { editorOnly: false };
}
});
}
//changes view to previewOnly when preview maximize button is clicked then back to full view when clicked again
previewChange() {
this.setState((state) => {
if (state.previewOnly === false) {
return { previewOnly: true };
} else {
return { previewOnly: false };
}
});
}
render() {
console.log(this.state);
if (this.state.editorOnly === false && this.state.previewOnly === false) {
return (
<div className="container-fluid px-0">
<div className="d-flex flex-column main">
<Editor editorChange={this.editorChange}
handleChange={this.handleChange}/>
<Preview previewChange={this.previewChange} />
</div>
</div>
);
} else if (
this.state.editorOnly === true &&
this.state.previewOnly === false
) {
return (
<div className="container-fluid px-0">
<div className="d-flex flex-column main">
<Editor editorChange={this.editorChange}
handleChange={this.handleChange}/>
</div>
</div>
);
} else if (
this.state.editorOnly === false &&
this.state.previewOnly === true
) {
return (
<div className="container-fluid px-0">
<div className="d-flex flex-column main">
<Preview previewChange={this.previewChange} />
</div>
</div>
);
}
else {
return(
<div></div>
)
}
}
}
class Editor extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div className="d-flex justify-content-center">
<form>
<div className="boxes">
<div className="d-flex align-items-center label-bar">
<div className="leftcon">
<i className="fa-solid fa-book"></i>
</div>
<div className="headings">Editor</div>
<div className="rightcon">
<button className="btn" onClick={this.props.editorChange}>
<i className="fa-solid fa-maximize"></i>
</button>
</div>
</div>
<textarea
value={this.props.inputValue}
onChange={this.props.handleChange}
></textarea>
</div>
</form>
</div>
);
}
}
class Preview extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
<div className="d-flex justify-content-center">
<form>
<div className="boxes">
<div className="d-flex align-items-center label-bar">
<div className="leftcon">
<i className="fa-solid fa-book"></i>
</div>
<div className="headings">Preview</div>
<div className="rightcon">
<button className="btn" onClick={this.props.previewChange}>
<i className="fa-solid fa-maximize"></i>
</button>
</div>
</div>
<div className="preview">
<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />
</div>
</div>
</form>
</div>
</div>
);
}
}
ReactDOM.render(<Application />, document.getElementById("app"));

A button element inside a form element by default has type="submit".
Hence, when you click the maximize button it tries to submit the form, making an http request.
This is not what you want here so you should set type="button" on your buttons. This way they will not trigger a form submission on click.
The same thing happens on your Preview component, but note that in the console you get the following message:
Form submission canceled because the form is not connected
I believe this is because the way you order the elements in the different states causes React to recreate the preview window in the DOM. If you switch Editor and Preview around in the state where both are visible then Editor works fine and Preview is broken.

React map adding background color special elements

I use map but I have one problem I am trying to set the background of a certain element inside the map, in my case it is "item .title" I want my element to look like this https://ibb.co/ccJzD6g as you can see in the picture background color " 100% "which I specifically set in the console for but in fact if I set" background: orange "for the sidebar_list class, then the color will be applied to all elements including the rest , https://ibb.co/ZBTX3hd and if I set the background for the titleName class it looks like this https://ibb.co/84RKBBw but I want it to look like this https://ibb.co/ccJzD6g how do i solve this problem?
Lesson.jsx
import React from 'react';
import less from "./css/lesson.module.css";
import "./css/betaLesson.css";
import { FontAwesomeIcon } from "#fortawesome/react-fontawesome";
import { Navbar } from "../../../Navbar/Navbar";
export class Lessons extends React.Component {
constructor(props) {
super(props);
this.state = {
indexDescription: 0,
}
}
render() {
const listLessons = this.props.lesson.map((item, index) => {
return (
<li key={index} className={less.sidebar_list} onClick={() => {
this.setState({ indexDescription: index })
}}>
<div>
<FontAwesomeIcon className={less.item_icon} icon={item.iconName} />
</div>
<div style={{background: "orange"}} className={less.titleName}>
<p>{item.title}</p>
</div>
<div className={less.titleName}>
<p>{item.titleName}</p>
</div>
</li>
);
});
return (
<>
<div className="abc">
<Navbar color="blue" bg="tomato" centerFlexNavbarContainer="flex"
navbarSearchPage="Search" navbarHomePage="Home" centerHeadlineNavbarColumn="center" />
<div className={less.wrapper}>
<div>
<div className={less.sidebar}>
<div>
<ul>
{listLessons}
</ul>
</div>
</div>
</div>
<div className={less.main_content}>
<div className={less.main_inside_content}>
<div className={less.header}>
<div>
<h2>JavaScript JSON Reference</h2>
</div>
</div>
<div className={less.info}>
<div className={less.description}>
<p>
{
this.props.lesson[this.state.indexDescription]["description"]
}
</p>
</div>
</div>
</div>
</div>
</div>
</div>
</>
);
}
}

First question answer: Create a new component with its own attributes separately and map/passdown the properties to the component.
Here's an example: https://codesandbox.io/s/objective-hopper-2st8g?file=/src/Lesson.js

Display/delete component on click

So, im trying to display my component named documentReader inside div with class desktop-app-grid by clicking and icon below, but icon is also a component, i tried doing this by using state, but i don't know how I can do this. I'm dropping my code below with hope someone can help me.
I got this:
<div className="desktop">
<div
className="desktop-app-grid"
>
</div>
<div className="taskbar">
<div className="taskbar-content">
<div className="apps">
<TaskbarAppIcon
appName="documentReader"
icon={icon}
title="My CV"
/>
</div>
<div className="status">
<Clock className="clock" />
</div>
</div>
</div>
</div>
);
}
And on click i want to get displayed in desktop-app-grid like this:
<div
className="desktop-app-grid"
>
<documentReader />
</div>
icon.js (code isn't complete)
class TaskbarAppIcon extends React.Component {
constructor() {
super();
this.state = {
clicked: false
};
this.handleClick = this.handleClick.bind(this);
}
handleClick = () => {
const icon = document.querySelector("img");
icon.classList.toggle("icon-active");
setTimeout(() => {
icon.classList.toggle("icon-active");
}, 200);
this.setState({
clicked: true
});
}
render(){
const classes = this.props.appName + "Icon icon";
return (
<div className={classes} onClick={this.handleClick}>
<img src={this.props.icon} alt={this.props.appName} title={this.props.title} className="icon-image"></img>
<div className="isActive"></div>
</div>
);
}
}
export default TaskbarAppIcon;
is there any function that works like innerHTML, but isn't a dangerouslyInnerHTML?

what you need to do is move your handleClick and clicked state to the parent component where you rendering TaskbarAppIcon. Being more specific where you have this code:
<div className="desktop">
<div className="desktop-app-grid">
</div>
<div className="taskbar">
<div className="taskbar-content">
<div className="apps">
<TaskbarAppIcon
appName="documentReader"
icon={icon}
title="My CV"
/>
</div>
<div className="status">
<Clock className="clock" />
</div>
</div>
</div>
</div>
So for example, the above code is in you App component, so you need to let it like this:
class App extends React.Component {
constructor() {
super();
this.state = {
clicked: false,
};
this.handleClick = this.handleClick.bind(this);
}
handleClick = () => {
const icon = document.querySelector("img");
icon.classList.toggle("icon-active");
setTimeout(() => {
icon.classList.toggle("icon-active");
}, 200);
this.setState({
clicked: !this.state.clicked,
});
};
render() {
return (
<div className="desktop">
<div className="desktop-app-grid">
// here's the trick, if your clicked state is TRUE it will show <documentReader />
{this.state.clicked && <documentReader />}
</div>
<div className="taskbar">
<div className="taskbar-content">
<div className="apps">
<TaskbarAppIcon
// Here you are specifying that TaskbarAppIcon has a prop handleClick and its a function
handleClick={this.handleClick}
appName="documentReader"
icon={icon}
title="My CV"
/>
</div>
</div>
</div>
</div>
);
}
}
And in your TaskbarAppIcon component you just need to change
<div className={classes} onClick={this.handleClick}>
to
<div className={classes} onClick={this.props.handleClick}>

Update component with data from parent in React

In my react app I have this child component that inherits data from its parent. However, it does not update the page with new data from the child component when a relevant anchor link is clicked.
Here's my build - https://suite-search-lk.surge.sh/result/369523
From the link above if you click on a suggested card h1 element it just updates the URL with the id but does not update the page with the relevant card data from that id.
Any idea how I can fix this? Do I have to force the component to re-update?
Parent component (Card Wrapper)
class CardWrapper extends React.Component {
constructor(props) {
super(props);
this.state = {
stories: []
};
}
componentDidMount() {
axios
.get(API)
// .then(response => console.log(response))
// get our stories array, check it and then change state to contain our stories
.then(data => {
let stories;
if (data.data.stories && data.data.stories) {
if (Array.isArray(data.data.stories)) {
stories = data.data.stories;
} else {
stories = [data.data.stories];
}
} else {
stories = [];
}
this.setState({
stories: stories
});
});
}
render() {
return (
<CardWrapperDiv>
<div className="headingWrapper">
<div className="heading"> Suggested for you</div>
</div>
<Cards>
{this.state.stories.map(story => {
return (
<Card
title={story.content.title}
img={story.content.img}
description={story.content.description}
deadline={story.content.deadline_date}
tags={story.content.tags}
key={story.id}
id={story.id}
/>
);
})}
</Cards>
</CardWrapperDiv>
);
}
}
export default CardWrapper;
Child component
class Card extends React.Component {
render() {
return (
<CardDiv>
<div className="cardbox">
<div className="cardDetails">
<div className="headlineText">
<Link to={`/result/${this.props.id}`}> {this.props.title} </Link>
</div>
<div className="headlineSub">Colombo, Sri Lanka</div>
<div className="headlineDes">{this.props.description}</div>
<div className="textRemain">
{" "}
Deadline date: {this.props.deadline}
</div>
<div className="buttonRow">
<button className="downloadBtn">Download</button>
<button className="viewBtn">View</button>
</div>
</div>
<div className="cardimgwrapper">
<div className="cardimg">
<img src={this.props.img} alt="some title" />
</div>
</div>
</div>
</CardDiv>
);
}
}
export default Card;

Sorry it seems I have figured this out using the following post - Can you force a React component to rerender without calling setState?
Although I'm not exactly sure if it's the best way to go about it.
Essentially I used an OnClick listener to run a function and forces a re-render of the entire component.
Hope this can help someone else :)
class Card extends React.Component {
handleButtonClick() {
this.forceUpdate();
}
render() {
return (
<CardDiv>
<div className="cardbox">
<div className="cardDetails">
<div className="headlineText">
<Link to={`/result/${this.props.id}`} onClick={this.handleButtonClick}> {this.props.title} </Link>
</div>
<div className="headlineSub">Colombo, Sri Lanka</div>
<div className="headlineDes">{this.props.description}</div>
<div className="textRemain">
{" "}
Deadline date: {this.props.deadline}
</div>
<div className="buttonRow">
<button className="downloadBtn">Download</button>
<button className="viewBtn">View</button>
</div>
</div>
<div className="cardimgwrapper">
<div className="cardimg">
<img src={this.props.img} alt="some title" />
</div>
</div>
</div>
</CardDiv>
);
}
}
export default Card;

U have to use ur child component as a pure component. PureComponent Update when ur props change.
class Card extends React.PureComponent {
handleButtonClick() {
this.forceUpdate();
}
render() {
return (
<CardDiv>
.....
.....
</CardDiv>
);
}
}
export default Card;

how to add input data to list in react js?

I am trying to make a Todo application but i am stuck,I am not able to proceed further. Please help
var Todo= React.createClass({
save() {
this.refs.newText.value
},
render(){
return(
<div className="list">
<h1> TO-DO List</h1>
<input type="text" ref="newtext" defaultValue={this.props.children} />
<button onclick={this.save} className="btn btn-primary glyphicon glyphicon-floppy-saved">
</button>
<ul>
<li>{this.target.value}</li>
</ul>
</div>
)
},
});

Maintain a state where in you will add the newly added item and then iterate over it to display in your view. Also you should not be using string refs, rather you should be going for ref callbacks as suggested by the react-docs. Also the onclick on button should be camelcase like onClick
var Todo= React.createClass({
getInitialState() {
return {
todos: []
}
},
save() {
var todos = [...this.state.todos];
todos.push(this.newText.value);
console.log(todos)
this.setState({todos});
},
render(){
return(
<div className="list">
<h1> TO-DO List</h1>
<input type="text" ref={(ip) => {this.newText = ip}}/>
<button onClick={this.save} className="btn btn-primary glyphicon glyphicon-floppy-saved">Save
</button>
<ul>
{this.state.todos.map(function(todo) {
return <li>{todo}</li>
})}
</ul>
</div>
)
},
});
ReactDOM.render(<Todo/>, document.getElementById('app'));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.2/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.0.2/react-dom.min.js"></script>
<div id="app"></div>

To add to Shubnam's answer, consider using ES6 classes and initializing the state in the constructor, since using ES6 classes is the recommended way now. React.createClass is now deprecated and shows a warning on the console. Check this code, notice that you will need to bind the save method.
Check these links for more info:
https://facebook.github.io/react/blog/#migrating-from-react.createclass
https://toddmotto.com/react-create-class-versus-component/
class Todo extends React.Component {
constructor(props) {
super(props);
this.state={todos:[]};
}
save() {
var todos = [...this.state.todos];
todos.push(this.newText.value);
this.setState({todos});
}
render(){
return(
<div className="list">
<h1> TO-DO List</h1>
<input type="text" ref={(ip) => {this.newText = ip}}/>
<button onClick={this.save.bind(this)} className="btn btn-primary glyphicon glyphicon-floppy-saved">Save
</button>
<ul>
{this.state.todos.map(function(todo) {
return <li>{todo}</li>
})}
</ul>
</div>
)
}
};
ReactDOM.render(<Todo/>, document.getElementById('app'));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="app"></div>

``
import React, { Component } from 'react';
import Nav from './nav';
class Delete_Contect extends Component {
constructor(props)
{
super(props);
this.state={
name:'vishal',
name_add:[1,2,4]
};
this.Change = this.Change.bind(this);
this.Add_data = this.Add_data.bind(this);
}
Change()
{
this.setState(
{
name:'boss'
}
)
}
Add_data(e)
{
const newContect = this.newText.value
this.setState({
name_add: [...this.state.name_add, newContect]
})
}
render() {
return (
<div>
{this.state.name_add.map((number) => {
return(
<li>{number}</li>
)
})}
<input type="text" ref={(ip) => {this.newText = ip}} />
<button onClick={this.Add_data}>submit</button>
</div>
);
}
}
export default Delete_Contect;