import React, { Component } from "react"; import { Link } from
"react-router-dom";
const emailRegx = /^(([^<>()\[\]\\.,;:\s#"]+(\.[^<>()\[\]\\.,;:\s#"]+)*)|(".+"))#((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
export default class ChefInfo extends Component { constructor(props) { super(props); this.state = { eInput: "",
small: "" };
-
----------
---------
}
handleChange = e => {
this.setState({
eInput: e.target.value
});
};
emailTest = () => {
if (emailRegx.test(this.state.eInput) === false) {
this.setState({
small: "your email is inccorect"
});
} else {
this.setState({
small: ""
});
}
};
render() {
return (
<div className="big-parent">
<form>
<div className="input">
<label>
<strong>E-mail</strong>
</label>
<input
type="email"
className="input-filed"
onChange={() => { //here the problem
this.handleChange();
this.emailTest();
}}
/>
<small className="small">{this.state.small}</small>
</div>
</form>
<a href="#" className="btn btn-dark button">
<strong>READY</strong>
</a>
</div>
);
} }
Your handlechange use event object parameter.
So you should pass event object.
onChange={(e) => { //here the problem
this.handleChange(e);
this.emailTest();
}}
But in this case, you don't need to use two function.
This is enough.
handleChange = (e) => {
this.setState({
eInput : e.target.value,
small : emailRegx.test(e.target.value) ? '' : "your email is incorrect"
})
};
You can refactor you code such that it looks like this. This make your render/template code look cleaner.
handleEvent(event) {
this.handleChange(event);
this.emailTest();
}
.
.
.
<input
type="email"
className="input-filed"
onChange={this.handleEvent}
/>
Related
I have one question. I created contact form in react and I want to collapsed only single contact, which was clicked. Toggle is method which should collapse it. And colapse is state. My problem is that when I click it affect all contact and all are collapsed. How can I improve it?
ContactBook.js
import React, { Component } from "react";
import Contact from "../Contact/Contact";
import "./ContactBook.css";
class ContactBook extends Component{
constructor(props){
super(props);
this.state = {
colapse :true,
contacts: [
{
id: 1,
name: 'Propulsion Academy',
address: 'Zurich',
avatar: 'propulsion-academy-logo.png'
},
{
id: 2,
name: 'Propulsion Academy',
address: 'Luzern',
avatar: 'propulsion-academy-logo.png'
},
{
id: 3,
name: 'Propulsion Academy',
address: 'Munich',
avatar: 'propulsion-academy-logo.png'
},
],
};
}
toggle=()=>{
const doesShow = this.state.colapse;
this.setState({colapse: !doesShow});
}
deleteContact=(contactIndex)=>{
//with slice method we create copy of an array
const contacts =this.state.contacts.slice();
contacts.splice(contactIndex, 1);
this.setState({contacts: contacts})
}
//get name from input
addName = e =>{
this.setState({
name: e.target.value,
})
}
//get address from input
addAddress = e =>{
this.setState({
address: e.target.value,
})
}
//update state on button click
handleSubmit = (e) =>{
e.preventDefault()
if(this.state.name && this.state.address) {
this.setState(state =>{
const newContact = {
id: Math.max(...state.contacts.map(c => c.id))+1,
name: this.state.name,
address: this.state.address,
}
return{
contacts:[...state.contacts, newContact]
}
})
}
}
render() {
return (
<div className="contactBook">
<form className ="addContact" >
<p>New Contact</p>
<label id="name"><p>Name</p><input type='text' id="name" onChange={this.addName}/></label>
<label id="address"><p>Address:</p><input type='text' id="address" onChange={this.addAddress} /></label>
<input type='file' name='file' />
<button type='submit' onClick= {this.handleSubmit}>SUBMIT</button>
</form>
<div className="contacts">
{this.state.contacts.map((contact, index) =>
< Contact key={contact.id} contact={contact} delete={()=>this.deleteContact(index)} colapse={this.state.colapse} toggle={this.toggle}/>)
}
</div>
</div>
);
}
};
export default ContactBook;
Contact.js
import React from "react";
import "./Contact.css";
import avatar from '../assets/user.png'
const Contact = (props) =>{
return (
<div className = "col" >
<img src={avatar} alt="avatar" onClick={props.toggle}/>
{props.colapse === true ?
<div>
<p>Name: {props.contact.name}</p>
<p>Address: {props.contact.address}</p>
<button onClick={props.delete}> Delete </button>
</div> : null
}
</div>
)
};
export default Contact;
I recommend to you to move the collapse and his method to the Contact component it self like this :
const Contact = (props) =>{
[collapse,setCollapse] = useState(true)
return (
<div className = "col" >
<img src={avatar} alt="avatar" onClick{()=>setCollape(prev=>!prev)}/>
{collapse === true ?
<div>
<p>Name: {props.contact.name}</p>
<p>Address: {props.contact.address}</p>
<button onClick={props.delete}> Delete </button>
</div> : null
}
</div>
)
};
In this component I created a state that will manage the collapse for each of the component the render in the map.
further more, the prev give you the last value you submit and it's best practice to use the prev instead of just setCollapse(!collapse)
You have one function for all contacts, and since you use .map() they will all behave the same, since toggling one toggles the state which is used to render all individual contacts. The solution would be to pass the selected contact in your state so your app actually knows which one is to be rendered! Hopefully that makes sense!
Good luck and let us know how things work out!
This is it:
ContactBook.js
import React, { Component } from "react";
import Contact from "./Contact";
// import "./ContactBook.css";
class ContactBook extends Component {
constructor(props) {
super(props);
this.state = {
contacts: [
{
id: 1,
name: "Propulsion Academy",
address: "Zurich",
avatar: "propulsion-academy-logo.png",
colapse: true
},
{
id: 2,
name: "Propulsion Academy",
address: "Luzern",
avatar: "propulsion-academy-logo.png",
colapse: true
},
{
id: 3,
name: "Propulsion Academy",
address: "Munich",
avatar: "propulsion-academy-logo.png",
colapse: true
}
]
};
}
// toggle = () => {
// const doesShow = this.state.colapse;
// this.setState({ colapse: !doesShow });
// };
deleteContact = contactIndex => {
//with slice method we create copy of an array
const contacts = this.state.contacts.slice();
contacts.splice(contactIndex, 1);
this.setState({ contacts: contacts });
};
togglecontact = contactIndex => {
let contacts = this.state.contacts.slice();
contacts[contactIndex].colapse = !contacts[contactIndex].colapse;
this.setState({ contacts: contacts });
};
//get name from input
addName = e => {
this.setState({
name: e.target.value
});
};
//get address from input
addAddress = e => {
this.setState({
address: e.target.value
});
};
//update state on button click
handleSubmit = e => {
e.preventDefault();
if (this.state.name && this.state.address) {
this.setState(state => {
const newContact = {
id: Math.max(...state.contacts.map(c => c.id)) + 1,
name: this.state.name,
address: this.state.address
};
return {
contacts: [...state.contacts, newContact]
};
});
}
};
render() {
return (
<div className="contactBook">
<form className="addContact">
<p>New Contact</p>
<label id="name">
<p>Name</p>
<input type="text" id="name" onChange={this.addName} />
</label>
<label id="address">
<p>Address:</p>
<input type="text" id="address" onChange={this.addAddress} />
</label>
<input type="file" name="file" />
<button type="submit" onClick={this.handleSubmit}>
SUBMIT
</button>
</form>
<div className="contacts">
{this.state.contacts.map((contact, index) => (
<Contact
key={contact.id}
contact={contact}
togglecontact={() => this.togglecontact(index)}
delete={() => this.deleteContact(index)}
colapse={this.state.colapse}
toggle={this.toggle}
/>
))}
</div>
</div>
);
}
}
export default ContactBook;
contactbook.js
import React from "react";
// import "./Contact.css";
const Contact = props => {
let buffer;
props.contact.colapse === true
? (buffer = (
<div>
<p>Name: {props.contact.name}</p>
<p>Address: {props.contact.address}</p>
<button onClick={props.delete}> Delete </button>
</div>
))
: null;
return (
<div className="col">
<img
onClick={props.togglecontact}
src="data:image/jpeg;base64,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"
/>
{buffer}
</div>
);
};
export default Contact;
can check it at:https://stackblitz.com/edit/react-mrvrr1?file=src%2FContact.js
only Toggling single element.
I'm trying to pass data from a React form in a Child component to a Parent component, but i'm missing something.
When i pass the data from within the parent component only, everything works fine. However i would really like to learn how to use several components.
I'm new to React and i would really appreciate help from someone.
This is my Parent Component:
import React from 'react';
import CalculateIMC from './calculateIMC'
import Results from './results';
import '../css/Form.css';
class App extends React.Component{
constructor(props) {
super(props)
this.state = {
name: "",
height: "",
weight: "",
bmi: "",
};
this.calBmi = this.calBmi.bind(this);
}
calBmi = () => {
const { height, weight } = this.state;
const calcBmi = (weight / (height / 100) ** 2).toFixed(2);
const bmiClass = this.getBmi(calcBmi);
this.setState({isSubmitted: true})
this.setState({
bmi: calcBmi,
bmiClass : bmiClass
})
}
getBmi = (bmi) => {
if(bmi < 18.5) {
return "Underweight";
}
if(bmi >= 18.5 && bmi < 24.9) {
return "Normal weight";
}
if(bmi >= 25 && bmi < 29.9) {
return "Overweight";
}
if(bmi >= 30) {
return "Obesity";
}
}
clearAll = () => {
console.log("test");
this.setState({
name: "",
height: "",
weight: "",
bmi: ""
});
};
render() {
return (
<div className="App">
<CalculateIMC calBmi={this.calBmi}/>
{this.state.isSubmitted && <Results {...this.state}/>}
</div>
);
}
}
export default App
Child component
import React from 'react';
class CalculateIMC extends React.Component{
constructor(props) {
super(props)
this.state = {
name: "",
height: "",
weight: "",
bmi: "",
};
this.handleSubmit = this.handleSubmit.bind(this);
}
handleSubmit = (e) => {
e.preventDefault()
this.props.calBmi()
}
render() {
return (
<div className="container">
<form className="card-body" onSubmit={e => this.handleSubmit(e)}>
<div className="field">
<div className="two fields">
<div className="field">
<label>Nom : </label>
<input type="text" required placeholder="Saisir votre nom" value={this.state.name} onChange={e => this.setState({ name: e.target.value })}/>
</div>
<div className="field">
<label>Taille : </label>
<input type="number" required placeholder="Taille en cms" value={this.state.height} onChange={e => this.setState({ height: e.target.value })}/>
</div>
<br />
<div className="field">
<label>Poids : </label>
<input type="number" required placeholder="Poids en Kgs" value={this.state.weight} onChange={e => this.setState({ weight: e.target.value })}/>
</div>
</div>
<button type="submit" className="ui button" tabIndex="1">Calcul</button>
<button className="ui button" tabIndex="0" onClick={this.props.clearAll}>Effacer</button>
</div>
</form>
</div>
)
}
}
export default CalculateIMC
You are not passing the child's form data to the parent, instead you are just calling the callback without parameters, that's the problem.
On the child component you should do this (or similar):
handleSubmit = (e) => {
e.preventDefault();
this.props.calBmi(this.state);
}
On the parent:
calBmi = (childFormData) => {
const { height, weight } = childFormData;
const calcBmi = (weight / (height / 100) ** 2).toFixed(2);
const bmiClass = this.getBmi(calcBmi);
this.setState({isSubmitted: true}); // you can merge this setState with below one
this.setState({
bmi: calcBmi,
bmiClass : bmiClass
})
}
You need to update your calBmi() prop to have the form values as a parameter:
parent:
calBmi = (formParameters) => {
// do something with formParameters
}
child:
handleSubmit = (e) => {
e.preventDefault()
this.props.calBmi({
name: this.state.name,
height: this.state.height,
weight: this.state.weight,
}
})
}
I suggest you also change its name calBmi => onFormSubmit
In my code, I use a click event on the InterestBox in order to update the appearance of the InterestBox and to change the state of the parent of the parent of InterestBox.
However, when I inspect the element with the React Developer Tools or that I try to send a request to my API, the state.interests is always empty. But, when I log the state in the console, it shows an array with a length of 0, but containing all the proper values.
I tried to find what is wrong with my code, but I think I need an external look to find what is wrong.
import axios from 'axios';
import * as Cookies from 'js-cookie';
import React, { Component } from 'react';
import Button from '../../components/Button';
import Dashboard from '../Dashboard';
import ErrorContainer from '../../components/ErrorContainer';
import InterestList from '../../components/register/InterestList';
export class EditUser extends Component {
constructor(props) {
super(props);
this.state = {loading: true, interests: []}
this.addInterest = this.addInterest.bind(this);
this.logState = this.logState.bind(this);
}
addInterest(id, name) {
console.log('hoppity hippity you parenty')
var mid = 'm' + id;
console.log(this.state.interests[mid] == undefined)
if(this.state.interests[mid] == undefined) {
console.log(this.state);
this.setState((state) => {
state.interests[mid] = name;
return {interests: state.interests}
}, () => {
console.log(JSON.stringify(this.state.interests))
})
} else {
console.log('deleted')
var newInterest = this.state.interests;
delete newInterest[mid]
this.setState({interests: newInterest})
}
console.log(this.state.interests)
}
componentDidMount() {
var token = Cookies.get('token');
axios.get('http://localhost:8000/api/details', {headers: {"Accept": 'application/json', "Authorization": `Bearer ${token}`}}).then(
(success) => {
this.setState({
loading: false,
firstname : success.data.data.user.firstname,
lastname: success.data.data.user.lastname,
email: success.data.data.user.email,
dob: success.data.data.user.dob,
address: success.data.data.user.address,
uinterests: success.data.data.interests
})
}, (error) => {
this.props.history.push('/deconnexion');
}
)
var places = require('places.js');
var placesAutocomplete = places({
appId: "plZJLSHIW8M5",
apiKey: "0eddd2fc93b5429f5012ee49bcf8807a",
container: document.querySelector('#address-input')
});
}
logState() {
console.log(this.state);
}
render() {
return (
<Dashboard loading={this.state.loading}>
<h1 className="title">Modifier mon profil</h1>
<form className="user-form offer-update-form" onSubmit={this.handleSubmit}>
<label>Prénom :</label>
<input type="text" name="firstname" value={this.state.firstname} onChange={this.handleChange}></input> <br />
<label>Nom de famille :</label>
<input type="text" name="lastname" value={this.state.lastname} onChange={this.handleChange}></input> <br />
<label>Email :</label>
<input type="email" name="email" value={this.state.email} onChange={this.handleChange} /><br />
<label>Adresse :</label>
<input type="address" id="address-input" name="address" value={this.state.address} onChange={this.handleChange} /><br />
<label>Date de naissance :</label>
<input type="date" name="dob" value={this.state.dob} onChange={this.handleChange} /><br />
<InterestList alreadyChecked={this.state.uinterests} onClick={this.addInterest} />
<ErrorContainer errors={this.state.errors} />
<Button type="primary">Soumettre les changements</Button>
</form>
<Button type="danger" onClick={this.logState} />
</Dashboard>
)
}
}
export default EditUser
```
```
import React, { Component } from 'react'
import InterestBox from './InterestBox'
import Axios from 'axios'
export class InterestList extends Component {
constructor(props) {
super(props);
this.state = {pinterests: []}
this.pinterestRefs = React.createRef()
this.pinterestRefs.current = [];
}
componentDidMount() {
Axios.get('http://localhost:8000/api/interests')
.then((success) => {
this.setState({pinterests: success.data.data.interests});
})
}
componentDidUpdate(prevProps) {
console.log(JSON.stringify(prevProps));
console.log(JSON.stringify(this.props))
if(this.props.alreadyChecked != prevProps.alreadyChecked) {
this.props.alreadyChecked.forEach((item) => {
this.pinterestRefs.current.forEach((pinterest) => {
if(item == pinterest.props.id) {
console.log(pinterest)
pinterest.handleClick();
}
})
console.log(item)
})
}
console.log(this.pin)
}
render() {
return (
<React.Fragment>
{Object.keys(this.state.pinterests).map((interest, i) => {
var pinterest = this.state.pinterests[interest];
var callbackRef = node => this.pinterestRefs.current[i] = node;
return <InterestBox id={pinterest.id} onClick={this.props.onClick} icon={pinterest.picture_src} title={pinterest.name} ref={callbackRef} />
})}
</React.Fragment>
)
}
}
export default InterestList
```
```
import React, { Component } from 'react'
export class InterestBox extends Component {
constructor(props) {
super(props);
this.images = require('../../img/interests/*.svg');
this.state = {activated: false};
this.interest_box_content = React.createRef();
this.interest_text = React.createRef();
this.handleClick = this.handleClick.bind(this);
this.updateDimensions = this.updateDimensions.bind(this);
}
handleClick() {
console.log('hoppity hippity you clicky')
this.props.onClick(this.props.id, this.props.title);
this.setState(prevState => ({
activated: !prevState.activated
}))
}
updateDimensions() {
console.log((window.getComputedStyle(this.refs.interest_box_content).width))
this.refs.interest_text = (window.getComputedStyle(this.refs.interest_box_content).width)
}
render() {
return (
<div className="column is-one-fifth-desktop is-half-touch">
<div className="interest-box">
<div className="interest-box-adjuster">
<div ref={"interest_box_content"} className={"interest-box-content " + (this.state.activated == true ? 'interest-box-activated' : '')} onClick={this.handleClick}>
<img className="interest-icon" src={this.images[this.props.icon]} style={{'height': '50%'}}></img>
<i className="activated-icon fas fa-check"></i>
<span ref={"interest_text"} className="interest-text">{this.props.title}</span>
</div>
</div>
</div>
</div>
)
}
}
export default InterestBox
```
you have initialized interest as an array using []
but then, you are updating it as a map state.interests[mid] = name;
Note: JS is not type-safe. after the above statement, interests no longer remained an array
That's the reason why on console you are able to see it being populated but with an array length of 0. that's because you are outputting an object now and not an array.
Hi I write a small component
export default class TextInput extends React.Component {
constructor(props) {
super(props);
this.onKeyPress = this.onKeyPress.bind(this);
this.state = { tags: [], value: "" };
}
onKeyPress(e) {
if (e.key === "Enter") {
this.setState({ tags: [...this.state.tags, e.target.value], value: "" });
}
}
render() {
return (
<div>
<div styleName="fieldset width-95">
<label>Tags</label>
<div>
<div>
{this.state.tags.map(tag => (
<span>{tag}</span>
))}
</div>
<input
type="text"
onKeyPress={this.onKeyPress}
value={this.state.value}
/>
</div>
</div>
</div>
);
}
}
after writing 1st time when I enter.it creates a tag but after that, I can't type anything in the input field. can anyone please explain how to enable typing so that I will be able to create another tag.
You also need an onChange handler as well to update state on user-input. Otherwise this.state.value will never update.
class TextInput extends React.Component {
constructor(props) {
super(props);
this.onKeyPress = this.onKeyPress.bind(this);
this.state = { tags: [], value: "" };
}
onKeyPress(e) {
if (e.key === "Enter") {
this.setState({ tags: [...this.state.tags, e.target.value], value: "" });
}
}
handleOnChange = e => {
this.setState({
value: e.target.value
});
};
render() {
return (
<div>
<div styleName="fieldset width-95">
<label>Tags</label>
<div>
<div>
{this.state.tags.map(tag => (
<span>{tag}</span>
))}
</div>
<input
type="text"
onChange={this.handleOnChange}
onKeyPress={this.onKeyPress}
value={this.state.value}
/>
</div>
</div>
</div>
);
}
}
See working sandbox: https://codesandbox.io/s/serene-https-t02h2
The problem is that you forgot to add an onClick event for the input, this will handle when you type something in it (You only need to update the state every time the onChange event is fire), like this (I've also made an update to a more ES6 syntax):
import React, { Component } from 'react';
export default class TextInput extends Component {
state = { tags: [], value: "" };
onKeyPress = e => {
if (e.key === "Enter") {
this.setState({ tags: [...this.state.tags, e.target.value], value: "" });
}
};
onClick = e => {
if (e && e.target && e.target.value) {
this.setState({ value: e.target.value });
}
};
render() {
const { tags, value } = this.state;
return (
<div>
<div styleName="fieldset width-95">
<label>Tags</label>
<div>
<div>
{tags.map(tag => (
<span>{tag}</span>
))}
</div>
<input
type="text"
onChange={this.onClick}
onKeyPress={this.onKeyPress}
value={value}
/>
</div>
</div>
</div>
);
}
}
You can try below code.And you remove value which you are set on state.And use onChange method.
import React, { Component } from 'react';
export default class TextInput extends React.Component {
constructor(props) {
super(props);
this.onKeyPress = this.onKeyPress.bind(this);
this.state = { tags: [] };
}
onKeyPress(e) {
if (e.key === "Enter") {
this.setState({ tags: [...this.state.tags, e.target.value], value:
e.target.value });
console.log("tag:",this.state.tags)
}
}
handleInputChange = (event) => {
this.setState({ [event.target.name]: event.target.value });
};
render() {
return (
<div>
<div styleName="fieldset width-95">
<label>Tags</label>
<div>
<div>
{this.state.tags.map(tag => (
<span >{tag}</span>
))}
</div>
<input
type="text"
onKeyPress={this.onKeyPress}
name="demo"
value={this.state.value}
onChange={this.handleInputChange}
/>
</div>
</div>
</div>
);
}
}
I am trying to run a function on a Todo list that when a todo is added. A function will check the input box to check if its empty and if its empty, not do anything.
However, after using the function to check if the input is empty, it always returns False even when its empty. Where is the bug here?
The function name in question is "checkInput()" and it runs from the main submit button on the page
import React from "react";
import "./App.css";
import { isTemplateElement } from "#babel/types";
class TodoListt extends React.Component {
state = {};
constructor(props) {
super(props);
this.state = {
userInput: "",
list: [],
};
}
changeUserInput(input) {
this.setState({
userInput: input
})
}
addToList() {
const { list, userInput } = this.state;
this.setState({
list: [...list, {
text: userInput, key: Date.now(), done: false
}],
userInput: ''
})
}
handleChecked(e, index) {
console.log(e.target.checked);
const list = [...this.state.list];
list[index] = { ...list[index] };
list[index].done = e.target.checked;
this.setState({
list
})
}
checkInput() {
console.log(this.state.userInput);
userInput: '' ? console.log("True") : console.log("False")
}
render() {
return (
<div className="to-do-list-main">
<input
onChange={(e) => this.changeUserInput(e.target.value)}
value={this.state.userInput}
type="text"
/>
<button onClick={() => { this.checkInput(); { this.addToList(this.state.userInput) } }}>Add todo</button>
{this.state.list.map((list, index) => (
<div className="form">
<ul>
<li><input type="checkbox" onChange={(e) => this.handleChecked(e, index)} />
<span style={{ textDecoration: list.done ? 'line-through' : 'inherit' }}>
{list.text}
</span>
</li>
</ul>
</div>
))}
</div>
);
}
}
export default TodoListt;