Develop Reference

Html Form is not taking input on using handlechange event as use state hook

I have created a register page and tried to access the input value using handleChange event but the form is not taking any input. If the 'value=""' field of form elements is commented or their values are set null then the form is working. I tried by declaring a global
const {name, email, phone, work, password, cpassword} = user;
and passed the attributes to their respective value="" field but still not worked. How to solve this issue?
This is the code of my signup page.
import React ,{useState} from "react";
import "bootstrap/dist/css/bootstrap.css";
import "bootstrap";
import "../css/Signup.css"
import img from "../imgs/register.png"
import { NavLink } from "react-router-dom";
const Signup = ()=>{
const [user, setUser] = useState({
name:"", email:"", phone:"", work:"", password:"", cpassword:""
});
let name, value;
const handleChange = (event)=>{
name = event.target.name;
value = event.target.value;
setUser({...user, [name]:value});
}
const postData = (event)=>{
}
return (
<section className="section-container">
<div className="container">
<div className="myCard">
<div className="row">
<div className="col-md-6">
<div className="myLeftCtn">
<form className="myForm text-center" method="POST">
<header>Sign Up</header>
<div className="form-group">
<i className="fas fa-user"></i>
<input className="myInput" type={"text"}
value={user.name}
onChange={handleChange}
placeholder="Username" id="username" required></input>
</div>
<div className="form-group">
<i className="fas fa-envelope"></i>
<input className="myInput" type={"text"}
value={user.email}
onChange={handleChange}
placeholder="Email" id="email" required></input>
</div>
<div className="form-group">
<i className="fas fa-phone"></i>
<input className="myInput" type={"text"}
value={user.phone}
onChange={handleChange}
placeholder="Mobile Number" id="phone" required></input>
</div>
<div className="form-group">
<i className="fas fa-user-tie"></i>
<input className="myInput" type={"text"}
value={user.work}
onChange={handleChange}
placeholder="Profession" id="work" required></input>
</div>
<div className="form-group">
<i className="fas fa-lock"></i>
<input className="myInput" type={"password"}
value={user.password}
onChange={handleChange}
placeholder="Password" id="password" required></input>
</div>
<div className="form-group">
<i className="fas fa-lock"></i>
<input className="myInput" type={"password"}
value={user.cpassword}
onChange={handleChange}
placeholder="Confirm Password" id="cpassword" required></input>
</div>
<div className="form-group">
<label>
<input id="check_1" name="check_1" type={"checkbox"} required />
<small>I read and agree to Terms and Conditions</small>
<div className="invalid-feedback">You must check the box.</div>
</label>
</div>
<input type={"submit"} onClick={postData} className="butt" value={"Create Account"}/>
</form>
</div>
</div>
<div className="col-md-6">
<div className="box">
<figure>
<img className="signup-img" src={img} alt="signup-img"></img>
</figure>
<div className=""><NavLink className="butt_out" to="/login">I am already registered</NavLink></div>
</div>
</div>
</div>
</div>
</div>
</section>
)
}
export default Signup;

Everything looks great.Accept this line of code
<input type="submit" onClick={postData} className="butt" value={"Create Account"}/>

Your event.target.name will always be "". You will need to add name attribute to your form like so:
<input className="myInput" type={"text"} name="name"
value={user.name}
onChange={handleChange}
placeholder="Username" id="username" required></input>
Alternatively, you can use event.target.id, but you will need to update your form so it matches the user object. E.g. input for username should have an id of "name"

the name is doesn't passed
Example:
<input className="myInput" type={"text"} name="email" value={user.email}
onChange={handleChange} placeholder="Email" id="email" required>
</input>
and you don't need to declare let name, value;
outside the function
Function should look like :
const handleChange = (event) => {
const name = event.target.name;
const value = event.target.value;
setUser({...user, [name]:value});
}
or
const handleChange = (event) => {
setUser({...user, [event.target.name]:event.target.value});
}

Doing real-time calculations in a form in react js components

I'm a new user to React and I'm having trouble with my app.. Basically I want to do some calculation when the user input some values it dynamically outputs the amount. The calculation should add the packaging amt with transport amt and subtract the discount amt, the result is then added to the product of kgs with price per kg to show the total amt. . If anyone can help me with this it would be very much appreciated. My code is included below `
import React from "react";
import APIHandler from "../utils/APIHandler";
import { Link } from "react-router-dom";
import AutoCompleteCustomer from "../components/AutoCompleteCustomer";
class HomeComponent extends React.Component {
constructor(props) {
super(props);
this.formSubmit = this.formSubmit.bind(this);
}
state = {
errorRes: false,
errorMessage: "",
btnMessage: 0,
sendData: false,
farmerlist: [],
customersDetails: [{
phone: "",
name: "",
}],
dataLoaded: false,
value: ""
};
async formSubmit(event) {
event.preventDefault();
this.setState({ btnMessage: 1 });
var apiHandler = new APIHandler();
var response = await apiHandler.saveOrdersData(
event.target.phone.value,
event.target.id.value,
event.target.town.value,
event.target.region.value,
event.target.kgs.value,
event.target.packaging.value,
event.target.discount.value,
event.target.transport.value,
event.target.comment.value,
event.target.farmer_id.value,
event.target.price.value,
event.target.amount.value,
);
console.log(response);
this.setState({ btnMessage: 0 });
this.setState({ errorRes: response.data.error });
this.setState({ errorMessage: response.data.message });
this.setState({ sendData: true });
}
//This Method Work When Our Page is Ready
componentDidMount() {
this.LoadFarmer();
}
async LoadFarmer() {
var apihandler = new APIHandler();
var farmerdata = await apihandler.fetchFarmerOnly();
this.setState({ farmerlist: farmerdata.data });
}
showDataInInputs = (index, item) => {
console.log(index);
console.log(item);
this.setState.customersDetails[index].phone = item.phone;
this.setState.customersDetails[index].id = item.id;
}
viewRequestDetails = (request_id) => {
console.log(request_id);
console.log(this.props);
this.props.history.push("/ordersDetails/" + request_id);
};
qtyChangeUpdate = (event) => {
var value = event.target.value;
this.state.total =
((parseInt(this.state.packaging) +
parseInt(this.state.transport) -
parseInt(this.state.discount)) +
(parseInt(this.state.kgs) * parseInt(this.state.price))) * value;
this.state.amount = value;
this.setState({});
};
render() {
return (
<section className="content">
<div className="container-fluid">
<div className="block-header">
<h2>MANAGE ORDERS & CUSTOMERS</h2>
</div>
<div className="row clearfix">
<div className="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<div className="card">
<div className="header">
<h2>Add Order</h2>
<ul className="header-dropdown m-r--5">
<Link to="/addcustomer" className="toggled waves-effect waves-block">
<button className="btn btn-primary m-r-15 waves-effect">
Add Customer
</button>
</Link>
</ul>
</div>
<div className="body">
<form onSubmit={this.formSubmit}>
{this.state.customersDetails.map((item, index) => (
<div className="row" key={index}>
<div className="col-lg-6">
<label htmlFor="email_address">
Phone No.{" "}
</label>
<div className="form-group">
<div className="form-line">
<AutoCompleteCustomer
itemPostion={index}
showDataInInputs={this.showDataInInputs}
/>
</div>
</div>
</div>
<div className="col-lg-6">
<label htmlFor="email_address">Customer Name</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="id"
name="id"
className="form-control"
placeholder="Enter Customer Name"
defaultValue={item.id}
data-index={index}
/>
</div>
</div>
</div>
</div>
))}
<div className="row">
<div className="col-lg-4">
<label htmlFor="email_address">Town</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="town"
name="town"
className="form-control"
placeholder="Enter Customer Town"
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Region</label>
<div className="form-group">
<div className="form-line">
<select id="region" name="region" className="form-control show-tick">
<option value="1">Nairobi</option>
<option value="2">Nyanza</option>
<option value="3">Central</option>
<option value="4">Coast</option>
<option value="5">Eastern</option>
<option value="6">North Eastern</option>
<option value="7">Western</option>
<option value="8">Rift Valley</option>
</select>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Kgs : </label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="kgs"
name="kgs"
className="form-control"
placeholder="Enter Quantity."
defaultValue={this.state.kgs}
onChange={this.qtyChangeUpdate}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Packaging</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="packaging"
name="packaging"
className="form-control"
placeholder="Enter Amount"
defaultValue={this.state.packaging}
onChange={this.qtyChangeUpdate}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Discount.</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="discount"
name="discount"
className="form-control"
placeholder="Enter Discount."
defaultValue={this.state.discount}
onChange={this.qtyChangeUpdate}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Transport</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="transport"
name="transport"
className="form-control"
placeholder="Enter Transport."
defaultValue={this.state.transport}
onChange={this.qtyChangeUpdate}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Comment</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="comment"
name="comment"
className="form-control"
placeholder="Enter Comment"
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Farmer Name</label>
<div className="form-group">
<select className="form-control show-tick"
id="farmer_id"
name="farmer_id"
>
{this.state.farmerlist.map((item) => (
<option key={item.id} value={item.id}>
{item.name}
</option>
))}
</select>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Price per Kg</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="price"
name="price"
className="form-control"
placeholder="Enter Price"
defaultValue={this.state.price}
onChange={this.qtyChangeUpdate}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Amount</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="amount"
name="amount"
className="form-control"
placeholder="Enter Amount"
value={this.state.amount}
onChange={this.qtyChangeUpdate}
/>
</div>
</div>
</div>
</div>
<br />
<button
type="submit"
className="btn btn-success m-t-15 waves-effect "
disabled={this.state.btnMessage === 0 ? false : true}
>
{this.state.btnMessage === 0
? "Add Order"
: "Adding Order Please Wait.."}
</button>
<br />
{this.state.errorRes === false &&
this.state.sendData === true ? (
<div className="alert alert-success">
<strong>Success!</strong> {this.state.errorMessage}.
</div>
) : (
""
)}
{this.state.errorRes === true &&
this.state.sendData === true ? (
<div className="alert alert-danger">
<strong>Failed!</strong>
{this.state.errorMessage}.
</div>
) : (
""
)}
</form>
</div>
</div>
</div>
</div>
</div>
</section>
);
}
}
export default HomeComponent;

I managed to get this working by using setState an binding event to the form
import React from "react";
import APIHandler from "../utils/APIHandler";
import { Link } from "react-router-dom";
import AutoCompleteCustomer from "../components/AutoCompleteCustomer";
class HomeComponent extends React.Component {
constructor(props) {
super(props);
this.formSubmit = this.formSubmit.bind(this);
this.updateKgs = this.updateKgs.bind(this);
this.updatePackaging = this.updatePackaging.bind(this);
this.updateDiscount = this.updateDiscount.bind(this);
this.updateTransport = this.updateTransport.bind(this);
this.updatePrice = this.updatePrice.bind(this);
this.formRef = React.createRef();
}
state = {
errorRes: false,
errorMessage: "",
btnMessage: 0,
sendData: false,
farmerlist: [],
kgs: "",
price: "",
packaging: "",
discount: "",
transport: "",
amount: "",
customersDetails: [
{
id: 0,
phone: "",
name: "",
customer_id: "",
},
],
dataLoaded: false,
};
async formSubmit(event) {
event.preventDefault();
this.setState({ btnMessage: 1 });
var apiHandler = new APIHandler();
var response = await apiHandler.saveOrdersData(
event.target.phone.value,
event.target.name.value,
event.target.customer_id.value,
event.target.town.value,
event.target.region.value,
event.target.kgs.value,
event.target.packaging.value,
event.target.discount.value,
event.target.transport.value,
event.target.comment.value,
event.target.farmer_id.value,
event.target.rice_type.value,
event.target.price.value,
event.target.amount.value,
);
console.log(response);
this.setState({ btnMessage: 0 });
this.setState({ errorRes: response.data.error });
this.setState({ errorMessage: response.data.message });
this.setState({ sendData: true });
this.formRef.current.reset();
}
//This Method Work When Our Page is Ready
componentDidMount() {
this.LoadFarmer();
}
async LoadFarmer() {
var apihandler = new APIHandler();
var farmerdata = await apihandler.fetchFarmerOnly();
this.setState({ farmerlist: farmerdata.data });
}
showDataInInputs = (index, item) => {
console.log(index);
console.log(item);
this.state.customersDetails[index].id = item.id;
this.state.customersDetails[index].phone = item.phone;
this.state.customersDetails[index].name = item.name;
this.state.customersDetails[index].customer_id = item.id;
this.setState({})
}
updateKgs = (event) => {
this.setState({
kgs: event.target.value
});
}
updatePackaging = (event) => {
this.setState({
packaging: event.target.value
});
console.log(this.state.packaging)
}
updateDiscount = (event) => {
this.setState({
discount: event.target.value
});
}
updateTransport = (event) => {
this.setState({
transport: event.target.value
});
}
updatePrice = (event) => {
this.setState({
price: event.target.value
});
}
updateAmount = () => {
this.setState({
amount: (Number(this.state.kgs) * Number(this.state.price)) + Number(this.state.packaging) + Number(this.state.transport) - Number(this.state.discount)
});
}
render() {
return (
<section className="content">
<div className="container-fluid">
<div className="block-header">
<h2>ADD ORDERS & CUSTOMERS</h2>
</div>
<div className="row clearfix">
<div className="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<div className="card">
<div className="header">
<h2>Add Order</h2>
<ul className="header-dropdown m-r--5">
<Link to={"/addcustomer"} className="toggled waves-effect waves-block">
<button className="btn btn-primary m-r-15 waves-effect">
Add Customer
</button>
</Link>
</ul>
</div>
<div className="body">
<form onSubmit={this.formSubmit} ref={this.formRef}>
{this.state.customersDetails.map((item, index) => (
<div className="row" key={index}>
<div className="col-lg-6">
<label htmlFor="email_address">
Phone No.{" "}
</label>
<div className="form-group">
<div className="form-line">
<AutoCompleteCustomer
itemPostion={index}
showDataInInputs={this.showDataInInputs}
/>
</div>
</div>
</div>
<div className="col-lg-5">
<label htmlFor="email_address">Customer Name</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="name"
name="name"
className="form-control"
placeholder="Enter Customer Name"
defaultValue={item.name}
/>
</div>
</div>
</div>
<div className="col-sm-1">
<label htmlFor="email_address">No</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="customer_id"
name="customer_id"
className="form-control"
placeholder=""
value={item.customer_id}
/>
</div>
</div>
</div>
</div>
))}
<div className="row">
<div className="col-lg-4">
<label htmlFor="email_address">Town</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="town"
name="town"
className="form-control"
placeholder="Enter Customer Town"
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Region</label>
<div className="form-group">
<div className="form-line">
<select id="region" name="region" className="form-control show-tick">
<option value="1">NAIROBI</option>
<option value="2">NYANZA</option>
<option value="3">CENTRAL</option>
<option value="4">COAST</option>
<option value="5">EASTERN</option>
<option value="6">NORTH EASTERN</option>
<option value="7">WESTERN</option>
<option value="8">RIFT VALLEY</option>
</select>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Kgs : </label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="kgs"
name="kgs"
className="form-control"
placeholder="Enter Quantity."
defaultValue={this.state.kgs}
onChange={this.updateKgs}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Packaging</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="packaging"
name="packaging"
className="form-control"
placeholder="Enter Amount"
defaultValue={this.state.packaging}
onChange={this.updatePackaging}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Discount.</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="discount"
name="discount"
className="form-control"
placeholder="Enter Discount."
defaultValue={this.state.discount}
onChange={this.updateDiscount}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Transport</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="transport"
name="transport"
className="form-control"
placeholder="Enter Transport."
defaultValue={this.state.transport}
onChange={this.updateTransport}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Comment</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="comment"
name="comment"
className="form-control"
placeholder="Enter Comment"
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Farmer Name</label>
<div className="form-group">
<select className="form-control show-tick"
id="farmer_id"
name="farmer_id"
>
{this.state.farmerlist.map((item) => (
<option key={item.id} value={item.id}>
{item.name}
</option>
))}
</select>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Rice Type</label>
<div className="form-group">
<div className="form-line">
<select id="rice_type" name="rice_type" className="form-control show-tick">
<option value="1">Pishori</option>
<option value="2">Komboka</option>
</select>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Price per Kg</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="price"
name="price"
className="form-control"
placeholder="Enter Price"
defaultValue={this.state.price}
onChange={this.updatePrice}
/>
</div>
</div>
</div>
<div className="col-lg-4">
<label htmlFor="email_address">Amount</label>
<div className="form-group">
<div className="form-line">
<input
type="text"
id="amount"
name="amount"
className="form-control"
placeholder="Enter Amount"
defaultValue={this.state.amount}
onClick={this.updateAmount}
/>
</div>
</div>
</div>
</div>
<br />
<button
type="submit"
className="btn btn-success m-t-15 waves-effect "
disabled={this.state.btnMessage === 0 ? false : true}
>
{this.state.btnMessage === 0
? "Add Order"
: "Adding Order Please Wait.."}
</button>
<br />
{this.state.errorRes === false &&
this.state.sendData === true ? (
<div className="alert alert-success">
<strong>Success!</strong> {this.state.errorMessage}.
<Link to="/orders" className="btn btn-info">View Orders</Link>
</div>
) : (
""
)}
{this.state.errorRes === true &&
this.state.sendData === true ? (
<div className="alert alert-danger">
<strong>Failed!</strong>
{this.state.errorMessage}.
</div>
) : (
""
)}
</form>
</div>
</div>
</div>
</div>
</div>
</section>
);
}
}
export default HomeComponent;
Hope this helpful to anyone facing a similar problem..

How to show success or error message based on the response of the api in React js

I have successfully executed the post Axios call using hooks in React js. But I am not sure how to show the success message or error message catching from the api response and show it below the form. The message should be exactly what is written in the API response.
My Messageform:
const MessageForm = () => {
const url = "https://example.herokuapp.com/api/messages"
const [data, setData] = useState({
first_name: "",
last_name: "",
email:"",
phone:"",
msz:""
})
function submit(e){
e.preventDefault();
axios.post(url,{
first_name: data.first_name,
last_name:data.last_name,
email:data.email,
phone:data.phone,
msz:data.msz
})
.then(res=>{
console.log(res.data)
})
setData({
first_name: "",
last_name: "",
email:"",
phone:"",
msz:""
});
}
function handle(e){
const newdata = {...data}
newdata[e.target.id] = e.target.value
setData(newdata)
console.log(newdata)
// setData("");
}
return (
<div className="message-form">
<div className="container">
<div className="title">
<span>Contact Now</span>
<div className="main-title">Send us a message</div>
</div>
{/* form start */}
<form action="" className="apply" onSubmit={(e)=> submit(e)}>
<div className="row row-1">
{/* Name here */}
<div className="input-field name">
<label htmlFor="Name">First Name</label>
<input onChange ={(e) => handle(e)} value = {data.first_name}
required
type="text"
placeholder="Your First Name"
name="Name"
id="first_name"
/>
</div>
<div className="input-field name">
<label htmlFor="Name">Last Name</label>
<input onChange ={(e) => handle(e)} value = {data.last_name}
required
type="text"
placeholder="Your Last Name"
name="Name"
id="last_name"
/>
</div>
</div>
<div className="row row-2">
{/* phone here */}
<div className="input-field phone">
<label htmlFor="Phone">Phone</label>
<input onChange ={(e) => handle(e)} value = {data.phone}
required
type="text"
placeholder="Your Phone Here"
name="Phone"
id="phone"
/>
</div>
{/* Email here */}
<div className="input-field email">
<label htmlFor="Email">Email Address</label>
<input onChange ={(e) => handle(e)} value = {data.email}
required
type="text"
placeholder="Your Email Address"
name="Email"
id="email"
/>
</div>
</div>
{/* date select */}
<div className="row row-3">
{/* Message here */}
<div className="input-field message">
<label htmlFor="Message">Message</label>
<textarea onChange ={(e) => handle(e)} value = {data.msz}
required
placeholder="Enter Message Here"
name="Message"
id="msz"
/>
</div>
</div>
{/* submit button */}
<ExploreButton hoverText="Submit" hover="hoverTrue">
Send Now
</ExploreButton>
</form>
{/* Form end */}
</div>
</div>
);
};
export default MessageForm;
This is the response that I get from the api
Here I want to catch the string written in message and render it in the UI. I am new to react and I am not sure how to do that.

Your API is returning a response stream, you need to use the response .json() method to read it to completion. But before you do that, you should store the response status code, as it becomes inaccessible after you parse the response JSON.
axios.post(url,{
first_name: data.first_name,
last_name:data.last_name,
email:data.email,
phone:data.phone,
msz:data.msz
}).then(response => {
let statusCode = response.status,
success = response.ok;
response.json().then(response => {
if(!success){
//handle errors here
console.log(response.message)
return;
}
// handle successful requests here
console.log(response.message)
})
}).catch((error) => {
// catch any unexpected errors
console.log(error);
})
Some general advice. you should try to separate your Axios requests into an independent function and make it reusable, or you will run into issues in the future if you decide to handle your API responses differently in the future.

I cleaned it up a bit, so its easier to understand. The short answer is use an additional "useState" hook to store the messages. Then have a logical operator (in the return section above row-1) to check if messages exists & display them.
Warning: None of this code was tested.
const INITIAL = {
first_name: "",
last_name: "",
email: "",
phone: "",
msz: ""
}
const MessageForm = () => {
const url = "https://example.herokuapp.com/api/messages"
const [data, setData] = useState(INITIAL);
const [message, setMessage] = useState(null);
function handleSubmit(e) {
e.preventDefault();
setMessage(null);
axios.post(url, data)
.then(res => {
setData(res.data);
setMessage(res.message);
})
.catch(err => {
setMessage(err.message);
})
}
function handleChange(e) {
const { id, value } = e.target; //destructuring
setData({...data, [id]:value})
}
return (
<div className="message-form">
<div className="container">
<div className="title">
<span>Contact Now</span>
<div className="main-title">Send us a message</div>
</div>
{/* form start */}
<form className="apply" onSubmit={handleSubmit}>
{message && <div>{message}</div>}
<div className="row row-1">
{/* Name here */}
<div className="input-field name">
<label htmlFor="Name">First Name</label>
<input onChange={handleChange}
value={data.first_name}
required
type="text"
placeholder="Your First Name"
name="Name"
id="first_name"
/>
</div>
<div className="input-field name">
<label htmlFor="Name">Last Name</label>
<input onChange={handleChange}
value={data.last_name}
required
type="text"
placeholder="Your Last Name"
name="Name"
id="last_name"
/>
</div>
</div>
<div className="row row-2">
{/* phone here */}
<div className="input-field phone">
<label htmlFor="Phone">Phone</label>
<input onChange={handleChange}
value={data.phone}
required
type="text"
placeholder="Your Phone Here"
name="Phone"
id="phone"
/>
</div>
{/* Email here */}
<div className="input-field email">
<label htmlFor="Email">Email Address</label>
<input onChange={handleChange}
value={data.email}
required
type="text"
placeholder="Your Email Address"
name="Email"
id="email"
/>
</div>
</div>
{/* date select */}
<div className="row row-3">
{/* Message here */}
<div className="input-field message">
<label htmlFor="Message">Message</label>
<textarea onChange={handleChange} value={data.msz}
required
placeholder="Enter Message Here"
name="Message"
id="msz"
/>
</div>
</div>
{/* submit button */}
<ExploreButton hoverText="Submit" hover="hoverTrue">
Send Now
</ExploreButton>
</form>
{/* Form end */}
</div>
</div>
);
};
export default MessageForm;

this.setState and this.state problem for Register page

I have a code for Registration Page. Where I'm trying to send data to database by using this.setState and this.state but everytime I run the code Its showing some error in onSubmit Function about this.state . Why I'm getting this error please tell me. I've a project to submit and I'm stuck on this
import React, {Component} from 'react';
import {register} from './UserFunctions';
class Register extends Component {
constructor() {
super()
this.state = {
first_name: '',
last_name: '',
email: '',
password: ''
};
this.onChange = this.onChange.bind(this)
this.onChange = this.onChange.bind(this)
}
onChange(e){
this.setState({[e.target.name]: e.target.value});
}
onSubmit(e){
e.preventDefault()
const user = {
first_name: this.state.first_name, [error line]
last_name: this.state.last_name,
email: this.state.email,
password: this.state.password
}
register(user).then(res => {
if (res) {
this.props.history.push('/login');
}
})
}
render() {
return (
<div className="container">
<div className="row">
<div className="col-md-6 mt-5 mx-auto">
<form noValidate onSubmit={this.onSubmit}>
<h1 className="h3 mb-3 font-weight-normal">Please Sign in!</h1>
<div className="form-group">
<label htmlFor="first_name">First Name</label>
<input type="text"
className="form-control"
name="first_name"
placeholder="First Name"
value={this.state.first_name}
onChange={this.onChange}
/>
</div>
<div className="form-group">
<label htmlFor="last_name">Last Name</label>
<input type="text"
className="form-control"
name="last_name"
placeholder="Last Name"
value={this.state.last_name}
onChange={this.onChange}
/>
</div>
<div className="form-group">
<label htmlFor="email">Email Address</label>
<input type="email"
className="form-control"
name="email"
placeholder="Enter Email"
value={this.state.email}
onChange={this.onChange}
/>
</div>
<div className="form-group">
<label htmlFor="password">Password</label>
<input type="password"
className="form-control"
name="password"
placeholder="Enter Password"
value={this.state.password}
onChange={this.onChange}
/>
</div>
<button type="submit"
className="btn btn-lg btn-primary btn-block">
Register
</button>
</form>
</div>
</div>
</div>
)
}
}
export default Register
Please tell me what should I do to solve this problem.

You have to bind it like you did with onChange
this.onSubmit = this.onSubmit.bind(this)
You forgot to do it probably, when copying onChange.

_this.showModal is not a function because of ref in reactjs

I'm opening otp modal component in login register page by using ref. I have created ref this.otpModalRef = React.createRef(); in constructor and calling this.showModal in register api success but it giving undefined below is my code. If I removed this.otpModalRef = React.createRef(); from constructor then modal works but when I click on login then it gives onOpenModal undefined. So I have to createRef in constructor. Any idea why is happening? I'm new to reactjs
below is my code
static contextTypes = {
router: PropTypes.object
}
constructor(props,context){
super(props,context);
this.state = {
fname:'',
lname:'',
emailaddress:'',
password:'',
mobile:'',
user:'',
login_pass:''
}
this.regi_data = this.regi_data.bind(this);
this.login_data = this.login_data.bind(this);
this.otpModalRef = React.createRef();
}
regi_data(e){
this.setState({[e.target.name] : e.target.value}
);
}
login_data(e){
this.setState({[e.target.name] : e.target.value})
}
otpModalRef = ({onOpenModal}) => {
this.showModal = onOpenModal;
}
componentDidMount(){
}
login = (e) => {
e.preventDefault();
axios.post('/api/signin', {
user:this.state.user,
password:this.state.login_pass,
})
.then(res => {
console.log(res);
this.context.router.history.push({
pathname:'/',
});
})
.catch(function (error) {
console.log(error.message);
})
}
register = (e,ref) => {
e.preventDefault();
axios.post('/api/user/add', {
firstname: this.state.fname,
lastname:this.state.lname,
email:this.state.emailaddress,
password:this.state.password,
mobile:this.state.mobile
},
)
.then(res => {
console.log(res);
this.showModal();
})
}
Below is render code
render(){
return(
<div className="kr-logincontent">
<div className="kr-themetabs">
<ul className="kr-tabnavloginregistered" role="tablist">
<li role="presentation" className="active">Log in</li>
<li role="presentation" className="">Register</li>
</ul>
<div className="tab-content kr-tabcontentloginregistered">
<div role="tabpanel" className="tab-pane fade active in" id="kr-loging">
<form onSubmit={this.login} className="kr-formtheme kr-formlogin">
<fieldset>
<div className="form-group kr-inputwithicon">
<i className="icon-profile-male"></i>
<input value={this.state.user} onChange={this.login_data} type="text" name="user" className="form-control" placeholder="Username Or Email"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-icons208"></i>
<input value={this.state.login_pass}onChange={this.login_data} type="password" name="login_pass" className="form-control" placeholder="Password"/>
</div>
<div className="form-group">
<div className="kr-checkbox">
<input type="checkbox" name="remember" id="rememberpass2"/>
<label htmlFor="rememberpass2">Remember me</label>
</div>
<span>Lost your Password?</span>
</div>
<button className="kr-btn kr-btngreen" >login</button>
</fieldset>
</form>
</div>
<div role="tabpanel" className="tab-pane fade " id="kr-register">
<form onSubmit={this.register} className="kr-formtheme kr-formlogin">
<fieldset>
<div className="form-group kr-inputwithicon">
<i className="icon-profile-male"></i>
<input type="text" onChange={this.regi_data} value={this.state.fname} name="fname" className="form-control" placeholder="Firstname"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-profile-male"></i>
<input type="text" onChange={this.regi_data} value={this.state.lname} name="lname" className="form-control" placeholder="Lastname"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-icons208"></i>
<input type="email" onChange={this.regi_data} value={this.state.emailaddress} name="emailaddress" className="form-control" placeholder="Email Address"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-lock-stripes"></i>
<input type="password" onChange={this.regi_data} value={this.state.password} name="password" className="form-control" placeholder="Password"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-phone"></i>
<input type="number" onChange={this.regi_data} value={this.state.mobile} name="mobile" className="form-control" placeholder="Mobile"/>
</div>
<button className="kr-btn kr-btngreen">Register</button>
</fieldset>
</form>
</div>
</div>
</div>
<div className="kr-shareor"><span>or</span></div>
<div className="kr-signupwith">
<h2>Sign in With...</h2>
<ul className="kr-signinloginwithsocialaccount">
<li className="kr-facebook"><i className="icon-facebook-1"></i><span>Facebook</span></li>
<li className="kr-twitter"><i className="icon-twitter-1"></i><span>Twitter</span></li>
<li className="kr-googleplus"><i className="icon-google4"></i><span>Google +</span></li>
</ul>
</div>
<div className="otp_modal">
<Otp ref={this.otpModalRef} ></Otp>
</div>
</div>
)
}

First point is that below code overwrites your created ref in your constructor.
otpModalRef = ({onOpenModal}) => {
this.showModal = onOpenModal;
}
second point is that you need to define this.showModal = null in your constructor.
could you provide render function and JSX code please?
I hope it helps you a bit to change your implementation.

static contextTypes = {
router: PropTypes.object
}
constructor(props,context){
super(props,context);
this.state = {
fname:'',
lname:'',
emailaddress:'',
password:'',
mobile:'',
user:'',
login_pass:''
}
this.otpModalRef = React.createRef();
}
regi_data = (e) => {
this.setState({[e.target.name] : e.target.value}
);
}
login_data = (e) => {
this.setState({[e.target.name] : e.target.value})
}
showModal = () => {
this.otpModalRef.onOpenModal();
//or
//this.otpModalRef.current.onOpenModal();
}
login = (e) => {
e.preventDefault();
axios.post('/api/signin', {
user:this.state.user,
password:this.state.login_pass,
})
.then(res => {
console.log(res);
this.context.router.history.push({
pathname:'/',
});
})
.catch(function (error) {
console.log(error.message);
})
}
register = (e,ref) => {
e.preventDefault();
axios.post('/api/user/add', {
firstname: this.state.fname,
lastname:this.state.lname,
email:this.state.emailaddress,
password:this.state.password,
mobile:this.state.mobile
},
)
.then(res => {
console.log(res);
this.showModal();
})
}
render(){
return(
<div className="kr-logincontent">
<div className="kr-themetabs">
<ul className="kr-tabnavloginregistered" role="tablist">
<li role="presentation" className="active">Log in</li>
<li role="presentation" className="">Register</li>
</ul>
<div className="tab-content kr-tabcontentloginregistered">
<div role="tabpanel" className="tab-pane fade active in" id="kr-loging">
<form onSubmit={this.login} className="kr-formtheme kr-formlogin">
<fieldset>
<div className="form-group kr-inputwithicon">
<i className="icon-profile-male"></i>
<input value={this.state.user} onChange={this.login_data} type="text" name="user" className="form-control" placeholder="Username Or Email"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-icons208"></i>
<input value={this.state.login_pass}onChange={this.login_data} type="password" name="login_pass" className="form-control" placeholder="Password"/>
</div>
<div className="form-group">
<div className="kr-checkbox">
<input type="checkbox" name="remember" id="rememberpass2"/>
<label htmlFor="rememberpass2">Remember me</label>
</div>
<span>Lost your Password?</span>
</div>
<button className="kr-btn kr-btngreen" >login</button>
</fieldset>
</form>
</div>
<div role="tabpanel" className="tab-pane fade " id="kr-register">
<form className="kr-formtheme kr-formlogin">
<fieldset>
<div className="form-group kr-inputwithicon">
<i className="icon-profile-male"></i>
<input type="text" onChange={this.regi_data} value={this.state.fname} name="fname" className="form-control" placeholder="Firstname"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-profile-male"></i>
<input type="text" onChange={this.regi_data} value={this.state.lname} name="lname" className="form-control" placeholder="Lastname"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-icons208"></i>
<input type="email" onChange={this.regi_data} value={this.state.emailaddress} name="emailaddress" className="form-control" placeholder="Email Address"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-lock-stripes"></i>
<input type="password" onChange={this.regi_data} value={this.state.password} name="password" className="form-control" placeholder="Password"/>
</div>
<div className="form-group kr-inputwithicon">
<i className="icon-phone"></i>
<input type="number" onChange={this.regi_data} value={this.state.mobile} name="mobile" className="form-control" placeholder="Mobile"/>
</div>
<button onClick={this.register} className="kr-btn kr-btngreen">Register</button>
</fieldset>
</form>
</div>
</div>
</div>
<div className="kr-shareor"><span>or</span></div>
<div className="kr-signupwith">
<h2>Sign in With...</h2>
<ul className="kr-signinloginwithsocialaccount">
<li className="kr-facebook"><i className="icon-facebook-1"></i><span>Facebook</span></li>
<li className="kr-twitter"><i className="icon-twitter-1"></i><span>Twitter</span></li>
<li className="kr-googleplus"><i className="icon-google4"></i><span>Google +</span></li>
</ul>
</div>
<div className="otp_modal">
<Otp ref={this.otpModalRef} ></Otp>
</div>
</div>
)
}
router: PropTypes.object
}
constructor(props,context){
super(props,context);
this.state = {
fname:'',
lname:'',
emailaddress:'',
password:'',
mobile:'',
user:'',
login_pass:''
}
this.otpModalRef = React.createRef();
}
regi_data = (e) => {
this.setState({[e.target.name] : e.target.value}
);
}
login_data = (e) => {
this.setState({[e.target.name] : e.target.value})
}
showModal = () => {
this.otpModalRef.onOpenModal();
//or
//this.otpModalRef.current.onOpenModal();
}
login = (e) => {
e.preventDefault();
axios.post('/api/signin', {
user:this.state.user,
password:this.state.login_pass,
})
.then(res => {
console.log(res);
this.context.router.history.push({
pathname:'/',
});
})
.catch(function (error) {
console.log(error.message);
})
}
register = (e,ref) => {
e.preventDefault();
axios.post('/api/user/add', {
firstname: this.state.fname,
lastname:this.state.lname,
email:this.state.emailaddress,
password:this.state.password,
mobile:this.state.mobile
},
)
.then(res => {
console.log(res);
this.showModal();
})
}