create a react input form with validation

Question

I am working on react input form but the problem is don't know how to validate, also not getting value on onChange, please have a look at my code.

I have created an array which value I need to update using the input form

useEffect(() => {
    let arr = [];
    for (let i = 0; i < Number(localStorage?.getItem("users")); i++) {
      arr.push({
        username: localStorage.getItem("userName"),
        user_email: localStorage.getItem("userEmail"),
        password: "",
        button: "",
        designation: "",
        country: "",
        city: "", 
        company_name: "",
      });
    }
    setUserRemaining(arr);
  }, []);

then i have input form , which i want with validation

{userRemaining.map((element, index) => {
                  return (
                    <div className="block2">
                      <input type="text" name="username" value='' onChange={(event) =>  handleChange(event, index)}/>
                      
                      <div className="add" onClick={() => addUser(element, index)}>
                        <span>
                          <img src={img1} />
                        </span>
                        Add
                      </div>
                    </div>
                  );
                })}

at last, here is my handleChange method I've tried.

const handleChange = (event, index) => {
    const updatedUser = userRemaining.map((users, index1) => {
      if (index1 == index) {
        return {
          ...users,
          [event.target.name]: event.target.value,
        };
      } else {
        return users;
      }

for more details, I am providing a link to the file too.

Daher · Accepted Answer · 2022-02-15 04:15:31Z

1

Hello I pretty recommend you use react hooks form https://react-hook-form.com/get-started#Applyvalidation Its pretty easy input validations using this library Here an small example

import React from "react";
import { useForm } from "react-hook-form";

export default function App() {
  const { register, handleSubmit } = useForm();
  const onSubmit = data => console.log(data);
   
  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <input {...register("firstName", { required: true, maxLength: 20 })} />
      <input {...register("lastName", { pattern: /^[A-Za-z]+$/i })} />
      <input type="number" {...register("age", { min: 18, max: 99 })} />
      <input type="submit" />
    </form>
  );
}

answered Feb 15, 2022 at 4:15

Daher

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2 Comments

How to Program Over a year ago

tried but not working in my case, can you please check the link i have given.

How to Program Over a year ago

ok this is working just want to add errors also to get validation.

React · Accepted Answer · 2022-10-17 16:08:14Z

0

As Daher said, react hooks form is a great way to validate your inputs.

You can find all the ways you can validate them at https://www.operationdev.com/blog/a-complete-guide-to-react-form-validation/

answered Oct 17, 2022 at 16:08

React

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1 Comment

Hamed Siaban Over a year ago

While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - From Review

Simon Ugorji · Accepted Answer · 2022-11-09 07:34:17Z

0

React hooks form is a great way to validate your forms but if you need something richer and easier to use, check out this NPM package.

https://www.npmjs.com/package/octavalidate-reactjs

Octavalidate helps me to validate my forms in react seamlessly.

answered Nov 9, 2022 at 7:34

Simon Ugorji

656 bronze badges

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