Develop Reference

How to delete all dynamically generated elements at once in a antd Form

If we have a component like this and we want to remove all generated elements at once (like reset the form elemets) how can i achive this by not removing elements from the DOM? The best approach should be to manipulate the "fields" directly, but how can we achive that?
import React, { useState, useContext } from 'react';
import { PlusOutlined, MinusOutlined } from '#ant-design/icons';
import { Button, Form } from 'antd';
const App = () => {
const [form] = Form.useForm();
const removeQuery = (event, key) => {
//How to remove all fields in fields?
};
return (
<Form
form={form}
name="dynamic_form_nest_item"
autoComplete="off"
preserve={false}
>
<Form.List name="filterattribute">
{(fields, { add, remove }) => (
<div>
<div>
<Form.Item>
<Button
type="dashed"
onClick={() => add()}
block
icon={<PlusOutlined />}
size="large"
>
Add Element
</Button>
</Form.Item>
</div>
<div className="greybg" style={{ padding: '6px 0px 8px' }}>
{fields.map(({ key, name, ...restField }) => (
<div
key={key}
style={{
display: 'flex',
marginTop: 0,
justifyContent: 'center',
}}
>
<MinusOutlined
key={key}
style={{ margin: '5px 15px -4px 0px', cursor: 'pointer' }}
onClick={(e) => {
remove(name);
removeQuery(e, key);
}}
/>
Element
</div>
))}
</div>
</div>
)}
</Form.List>
</Form>
);
};
export default App;
Here's a working example in Stackblitz:
https://stackblitz.com/edit/react-ts-a8fmfb?file=App.tsx

How to add conditions ( colour, text) to button based on data from Firebase

i am trying to put conditions on the Button, in my component. I have a Boolean condition from my Firebase collection for lastRunStatus {cloundFunctions.lastRunStatus} and if it's true i was it to stay green and say 'Cloud Function' and if its false i want it to turn red and say 'somethings wrong.
Any tips, pointers, or code would be highly appreciated :)
import "../../App";
import "semantic-ui-css/semantic.min.css";
import { Icon, Card, Button } from "semantic-ui-react";
import "semantic-ui-css/semantic.min.css";
import React from "react";
import "semantic-ui-css/semantic.min.css";
import moment from "moment";
const Cards = ({ cloudFunction }) => {
return (
<Card color="green">
<Card.Content>
<Card.Header>{cloudFunction.id}</Card.Header>
</Card.Content>
<Card.Content extra>
<Icon name="cog" /> Records: {cloudFunction.lastRunLoad}
<br />
<Icon name="cog" />
{cloudFunction.lastRunMessage}
<br />
<Icon name="clock" /> Last Run:{" "}
{moment(cloudFunction.lastRunTime.toDate().toString()).format(
"DD/MM/YYYY HH:mm",
true
)}
<br />
<Icon name="angle double down" />
Schedule: {cloudFunction.schedule}
</Card.Content>
<Card.Content extra>
<div className="ui two buttons">
<Button
basic
type="button"
color="green"
onClick={(e) => {
e.preventDefault();
window.open(cloudFunction.url.toString(), "_blank");
}}
>
Cloud Function
</Button>
</div>
</Card.Content>
</Card>
);
};
export default Cards;

Look at conditions in React. If I understand your correctly, you can do something like:
{cloundFunctions.lastRunStatus ? (
<Button
basic
type="button"
color="green"
onClick={(e) => {
e.preventDefault();
window.open(cloudFunction.url.toString(), "_blank");
}}
>
Cloud Function
</Button>
) : (
<div>Something's wrong</div>
)

How to efficiently toggle classes with multiple HTML elements across multiple files

I am toggling an arrow image whenever my div is clicked. I am controlling the state of the click with
const [toggleArrow, setToggleArrow] = useState(false)
My div has an onClick function that controls the state and toggles the faq-subject-toggle-arrow class that adds an image
<div className={`faq-subject ${toggleArrow ? 'faq-subject-toggle-arrow' : ''}`} onClick={() => {
setToggleArrow(!toggleArrow)
}>
My problem is that I have 50 divs across multiple styles and don't want to make 50 states to toggle one image.
Is there a more efficient solution for this with less code?

I created something that does the same thing. I extracted your code and made a component. now the state lives inside the component and will not affect others.
live demo
component
import { useState } from "react";
export const Button = () => {
const [toggleArrow, setToggleArrow] = useState(false);
return (
<div
style={{ width: "50px", height: "50px", margin: "10px" }}
className={`faq-subject ${toggleArrow ? "faq-subject-toggle-arrow" : ""}`}
onClick={() => {
setToggleArrow(!toggleArrow);
}}
></div>
);
};
css file, I didn't have the same classes so I created mine.
.faq-subject {
background: blue;
}
.faq-subject-toggle-arrow {
background: orange;
}
now you can use it wherever you want for multiple times
import { Button } from "./button";
import "./styles.css";
export default function App() {
return (
<div className="App">
<Button />
<Button />
<Button />
<Button />
<Button />
</div>
);
}

How do I pass click event to child component

I have a two react bootstrap buttons within a dropdown and I am trying to understand why the onClick event is not working. The button are returned from function. I can get the event to fire if I just use Button in the main render function. I'd like to know why this is happening. Is returning the component from a function ok? Or do I need to use a class;
Code:
{this.state.filterDropdowns.map((value, indexNo) =>
<Dropdown
className="button"
key={`${indexNo}`}
>
<Dropdown.Toggle variant="light" size="sm">
{value.name}
</Dropdown.Toggle>
<Dropdown.Menu className="custommenu">
{value.data.result.map((input, index) =>
<div key={`${index}`}>
<input
key={`${index}`}
id={input}
type="checkbox"
defaultChecked
onClick={(e) => this.clickFilterBox(e, indexNo)}
>
</input>{" " + input}<br></br>
</div>
)}
<Dropdown.Divider />
<CustomButtons
length={value.data.result.length}
index={indexNo}
onClear={(e) => this.onClear(e)}
onSelect={(e) => this.onSelect(e)}
>
</CustomButtons>
</Dropdown.Menu>
</Dropdown>
)}
Custom button function
const CustomButtons = function(props) {
if (props.length < 10) {
return(<div></div>);
} else {
return (
<div >
<div className="select-div">
<Button
size="sm"
onClick={props.onSelect}
>
Select
</Button>
</div>
<div className="clear-div">
<Button
size="sm"
onClick={props.onClear}
>
Clear
</Button>
</div>
</div>
);
}
}

You need to change your implementation as follows:
<CustomButtons
length={value.data.result.length}
index={indexNo}
onClear={this.onClear.bind(this)}
onSelect={this.onSelect.bind(this)}
/>
Then in the function implement it like this:
<Button
size="sm"
onClick={(e) => props.onSelect(e)}
>
Select
</Button>

For anyone interested this is a solution:
Created a class for custom buttons
import React from 'react';
import {Button} from 'react-bootstrap';
export default class CustomButtons extends React.Component {
constructor(props) {
super(props);
this.state = {
length: props.length,
onClear: props.onClear,
onSelect: props.onSelect
}
}
render() {
if (this.state.length < 10) {
return(<div></div>);
} else {
return (
<div >
<div className="select-div">
<Button
size="sm"
onClick={this.state.onSelect}
>
Select
</Button>
</div>
<div className="clear-div">
<Button
size="sm"
onClick={this.state.onClear}
>
Clear
</Button>
</div>
</div>
);
}
}
}
Then in main app component
<CustomButtons
length={value.data.result.length}
index={indexNo}
onClear={(e) => this.onClear(e)}
onSelect={(e) => this.onSelect(e)}
>
</CustomButtons>

How to make a button click another button from different components in React

I'm new to react and it is kinda hard to understand the one way data flow on it, i was making a simple app and i'm using mdbootstrap for some ready bootstrap components, I imported the component of a modal (which has a button when clicked it toggles a modal) so in my app i have cards, each one has a button that's supposed to toggle the button, but i couldn't figure out how to link the card's button with the mdbootstrap component's button.
The Card component:
import React, { Component } from 'react';
import ModalPage from './modal.jsx'
class Card extends Component {
render() {
return (
<div>
<div className="card m-5" style={{ width: '18rem' }}>
<img src={this.props.img} className="card-img-top" />
<div className="card-body">
<h5 className="card-title">{this.props.title}</h5>
<p className="card-text">{this.props.desc}</p>
<button onClick={/*I don't know what exactly i should put here */}></button>
</div>
</div>
</div>
)
}
}
export default Card;
The modal componant:
import React, { Component } from 'react';
import { MDBContainer, MDBBtn, MDBModal, MDBModalBody, MDBModalHeader, MDBModalFooter } from 'mdbreact';
class ModalPage extends Component {
state = {
modal13: false
}
toggle = nr => () => {
let modalNumber = 'modal' + nr
this.setState({
[modalNumber]: !this.state[modalNumber]
});
}
render() {
return (
<MDBContainer>
{/* This is the button I want to click when clicking the card's button */}
<MDBBtn color="primary" onClick={this.toggle(13)}>
Modal
</MDBBtn>
<MDBModal isOpen={this.state.modal13} toggle={this.toggle(13)}>
<MDBModalHeader toggle={this.toggle(13)}>
{this.props.title}
</MDBModalHeader>
<MDBModalBody>
{/* edit here */}
{this.props.content}
</MDBModalBody>
<MDBModalFooter>
<MDBBtn color="secondary" onClick={this.toggle(13)}>
Close
</MDBBtn>
<MDBBtn color="primary">Save changes</MDBBtn>
</MDBModalFooter>
</MDBModal>
</MDBContainer>
);
}
}
export default ModalPage;

Rather than having 2 click events you only need one on the child component. Instead of trying to send a click to the parent button in order to call toggle() just pass the toggle function to the child to be called:
Card:
import React, { Component } from 'react';
import ModalPage from './modal.jsx'
class Card extends Component {
render() {
return (
<div>
<div className="card m-5" style={{ width: '18rem' }}>
<img src={this.props.img} className="card-img-top" />
<div className="card-body">
<h5 className="card-title">{this.props.title}</h5>
<p className="card-text">{this.props.desc}</p>
//*****************************************
<button onClick={this.props.click}></button>
//*****************************************
</div>
</div>
</div>
)
}
}
export default Card;
Modal:
import React, { Component } from 'react';
import { MDBContainer, MDBBtn, MDBModal, MDBModalBody, MDBModalHeader, MDBModalFooter } from 'mdbreact';
class ModalPage extends Component {
state = {
modal13: false
}
toggle = nr => () => {
let modalNumber = 'modal' + nr
this.setState({
[modalNumber]: !this.state[modalNumber]
});
}
render() {
return (
<MDBContainer>
{/* I am assuming that this is a reference to <Card /> - simply pass in the onClick function as a parameter. You can even use onClick here and this.props.onClick in the child element */}
<MDBBtn color="primary" click={this.toggle(13)}>
Modal
</MDBBtn>
<MDBModal isOpen={this.state.modal13} toggle={this.toggle(13)}>
<MDBModalHeader toggle={this.toggle(13)}>
{this.props.title}
</MDBModalHeader>
<MDBModalBody>
{/* edit here */}
{this.props.content}
</MDBModalBody>
<MDBModalFooter>
<MDBBtn color="secondary" onClick={this.toggle(13)}>
Close
</MDBBtn>
<MDBBtn color="primary">Save changes</MDBBtn>
</MDBModalFooter>
</MDBModal>
</MDBContainer>
);
}
}
export default ModalPage;