Validation with Joi
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LoginForm.jsx
import React, { Component } from "react";
import Joi from "joi-browser";
import Input from './Common/Input';
class LoginForm extends Component {
state = {
account : {
username: '',
password: ''
},
errors: {}
};
schema = {
username: Joi.string().required().label("Username"),
password: Joi.string().required().label("Password")
};
validate = () => {
const options = { abortEarly: false };
const { error } = Joi.validate(this.state.account, this.schema, options);
// console.log(result)
if (!error) return null;
const errors = {};
for (let item of error.details) errors[item.path[0]] = item.message;
return errors;
};
validateProperty = ({ name, value }) => {
const obj = { [name]: value };
const schema = { [name]: this.schema[name] }
const {error} = Joi.validate(obj, schema);
return error ? error.details[0].message : null;
}
handleSubmit = e => {
e.preventDefault();
const errors = this.validate();
// console.log(errors);
this.setState({ errors: errors || {} })
if (errors) return;
// Call the server
// const username = this.username.current.value;
console.log("submit")
}
handleChange = ({ currentTarget: input }) => {
const errors = { ...this.state.errors };
const errorMessage = this.validateProperty(input);
if (errorMessage) errors[input.name] = errorMessage;
else delete errors[input.name];
const account = {...this.state.account};
account[input.name] = input.value;
this.setState({ account, errors });
}
render(){
const { account, errors } = this.state;
return (
<>
<div>
<h1>Login</h1>
<form onSubmit={this.handleSubmit} >
<Input
name="username"
value={account.username}
label="Username"
onChange={this.handleChange}
error={errors.username}
/>
<Input
name="password"
value={account.password}
label="Password"
onChange={this.handleChange}
error={errors.password}
/>
<button disabled={this.validate()} className="btn btn-primary">Login</button>
</form>
</div>
</>
)
}
}
export default LoginForm
Input.jsx
import React from "react";
const Input = ({ name, label, value, onChange, error }) => {
return (
<>
<div className="form-group">
<label htmlFor={name}>{ label }</label>
<input
value={value}
onChange={onChange}
id={name}
name={name}
type="text"
className="form-control"
/>
{ error && <div className="alert alert-danger">{error}</div> }
</div>
</>
)
}
export default Input;
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