json-msg-react

This might be similar to Formik but in a hook form , and this is also use json-msg as a validator. Json-msg is a lightweight alternative for yup and joi or any other schema validator.

Prerequisite

• Basic knowledge of json-msg for building schema

Check json-msg documentation here

Install

npm install json-msg-react

or

yarn add json-msg-react

Usage

import React from "react";
import jm, { useForm } from "json-msg-react";

const schema = {
  username: jm.str({ min: 5 }),
  password: jm.str({ min: 8, max: 40 }),
  pin: jm.num({ digit: 4 }),
};
const initialData = {
  username: "",
  password: "",
  pin: 0,
};
const Example = () => {
  const { handleChange, handleSubmit, errors } = useForm(initialData, schema);

  function submit(data) {
    console.log(data);
  }
  return (
    <>
      <form onSubmit={handleSubmit(submit)}>
        <input name="username" onChange={handleChange} />
        {errors.username && <p> {errors.username} </p>}
        <input name="password" type="password" onChange={handleChange} />
        {errors.username && <p> {errors.username} </p>}
        <input name="pin" type="number" onChange={handleChange} />
        {errors.password && <p> {errors.password} </p>}
      </form>
    </>
  );
};

API

useForm(initialData,schema, option)

---

• initialData:? Object
• schema:? Object

option	type	default	description
showAllErrors	boolean	false	Show all the errors in array form
trim	boolean	false	Trim all the string in the data
validateOnChange	boolean	true	Validate on change the data
validateOnMount	boolean	false	Validate the data on mount