Create React form auto validated using formik and yup

Formik and Yup are two powerful libraries in the React ecosystem that streamline form handling and validation. Let's dive into what makes them special and why they can greatly enhance your development experience! 🚀

📝 Understanding Formik

Formik is a flexible and intuitive library that helps you manage form state, validation, and submission in React applications. It simplifies the process of handling complex forms by providing an elegant API and seamless integration with React components. 📊

📋 Introducing Yup

Yup is a JavaScript schema validation library that works seamlessly with Formik. It allows you to define validation rules and constraints for your form inputs, ensuring that user input meets your specified requirements. With Yup, form validation becomes more efficient and reliable. ✅

🤔 Why Should You Use Formik and Yup?

By utilizing Formik and Yup, you can significantly reduce the boilerplate code traditionally associated with form management in React. These libraries provide a declarative approach to form handling, making your code more readable, maintainable, and efficient. ⚡️

💡 The Best Approach: A Closer Look

While there are various methods to create Formik forms, let me share my personal favorite for its simplicity and readability. By following this approach, you'll be able to build forms more efficiently and save time during development. 🎯

import { useFormik } from "formik";
import * as Yup from "yup";

const validationSchema = Yup.object({
    email: Yup.string().label("Email is required").email().required(),
});

const initialValues = {
    email: "",
};

function FormikForm() {
    const handleSubmit = async credentials => {
        try {
            alert("Credentials received");
            console.log(credentials);
        } catch (error) {
            console.error(error);
        }
    };

    const formik = useFormik({
        validationSchema,
        initialValues,
        onSubmit: handleSubmit,
    });
    return (
        <form
            onSubmit={formik.handleSubmit}
            className="py-8 text-base leading-6 space-y-4 text-gray-700 sm:text-lg sm:leading-7"
        >
            <div>
                <div className="mb-4">
                    <label
                        className="block text-gray-700 text-sm font-bold mb-2"
                        htmlFor={"email"}
                    >
                        Email
                    </label>
                    <input
                        className={`${
                            formik.touched["email"] && formik.errors["email"]
                                ? "border-red-400"
                                : "border-gray-300"
                        }`}
                        type="text"
                        name={"email"}
                        id={"email"}
                        onChange={formik.handleChange}
                        onBlur={formik.handleBlur}
                        value={formik.values["email"]}
                    />

                    {formik.touched["email"] && formik.errors["email"] && (
                        <span className="text-red-400">{formik.errors["email"]}</span>
                    )}
                </div>
            </div>

            <div className="relative">
                <button
                    type="submit"
                    disabled={formik.isSubmitting}
                    className={`btn ${formik.isSubmitting && "disabled"}`}
                >
                    Login
                </button>
            </div>
        </form>
    );
}

export default FormikForm;

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