Create a Random Joke using React app through API

Create a Form using React JS

Last Updated : 17 Oct, 2024

Creating a From in React includes the use of JSX elements to build interactive interfaces for user inputs. We will be using HTML elements to create different input fields and functional component with useState to manage states and handle inputs.

Prerequisites:

Preview Image: Let us have a look at what the final project will look like:

Forms in ReactJS

Approach to Build Form in React

To create a form in React we will structure the form with HTML inputs, add styles using CSS, manage input state using useState, and handle form data updates via onChange events.

Steps to Create a Form Using React JS

Follow these steps to create a form in react

First use create-react-app command to set up the react project.
HTML From to create the form structure
HTML Input of type text, textarea, number, radio, checkbox and select-options and add respective labels for the inputs.
HTML Button for reset and submit actions.
CSS class and properties to style the Form label, inputs and buttons.
Use the React useState hook to store and process the user input data.
Define the functions that trigger with the onchange event and update the data in state variable.

Example: This example demonstrate how to create basic form in react with the help of HTML inputs.

CSS

/* Filename - App.css */
/* It containds the Form and Page Styling*/

body {
    background: #f3f3f3;
    text-align: center;
}
.App {
    background-color: #fff;
    border-radius: 15px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    padding: 10px 20px;
    transition: transform 0.2s;
    width: 500px;
    text-align: center;
    margin: auto;
    margin-top: 20px;
}

h1 {
    font-size: x-large;
    text-align: center;
    color: #327c35;
}

fieldset {
    border: none;
}

input {
    display: block;
    width: 100%;
    /* margin-bottom: 15px; */
    padding: 8px;
    box-sizing: border-box;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-size: 12px;
}
input[type="radio"],
input[type="checkbox"] {
    display: inline;
    width: 10%;
}
select {
    display: block;
    width: 100%;
    margin-bottom: 15px;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid #ddd;
    border-radius: 5px;
}

label {
    font-size: 15px;
    display: block;
    width: 100%;
    margin-top: 8px;
    margin-bottom: 5px;
    text-align: left;
    color: #555;
    font-weight: bold;
}

button {
    padding: 15px;
    border-radius: 10px;
    margin: 15px;
    border: none;
    color: white;
    cursor: pointer;
    background-color: #4caf50;
    width: 40%;
    font-size: 16px;
}
textarea {
    resize: none;
    width: 98%;
    min-height: 100px;
    max-height: 150px;
}

JavaScript

// Filename - App.js
// It contains the Form, its Structure
// and Basic Form Functionalities

import "./App.css";
import { React, useState } from "react";

function App() {
    const [firstName, setFirstName] = useState("");
    const [lastName, setLastName] = useState("");
    const [email, setEmail] = useState("");
    const [contact, setContact] = useState("");
    const [gender, setGender] = useState("male");
    const [subjects, setSubjects] = useState({
        english: true,
        maths: false,
        physics: false,
    });
    const [resume, setResume] = useState("");
    const [url, setUrl] = useState();
    const [selectedOption, setSelectedOption] =
        useState("");
    const [about, setAbout] = useState("");

    const handleSubmit = (e) => {
        e.preventDefault();
        console.log(
            firstName,
            lastName,
            email,
            contact,
            gender,
            selectedOption,
            subjects,
            resume,
            url,
            about
        );
        // Add your form submission logic here
    };

    const handleSubjectChange = (sub) => {
        setSubjects((prev) => ({
            ...prev,
            [sub]: !prev[sub],
        }));
    };
    const handleReset = () => {
        // Reset all state variables here
        setFirstName("");
        setLastName("");
        setEmail("");
        setContact("");
        setGender("male");
        setSubjects({
            english: true,
            maths: false,
            physics: false,
        });
        setResume("");
        setUrl("");
        setSelectedOption("");
        setAbout("");
    };

    return (
        <div className="App">
            <h1>Form in React</h1>
            <fieldset>
                <form action="#" method="get">
                    <label for="firstname">
                        First Name*
                    </label>
                    <input
                        type="text"
                        name="firstname"
                        id="firstname"
                        value={firstName}
                        onChange={(e) =>
                            setFirstName(e.target.value)
                        }
                        placeholder="Enter First Name"
                        required
                    />
                    <label for="lastname">Last Name*</label>
                    <input
                        type="text"
                        name="lastname"
                        id="lastname"
                        value={lastName}
                        onChange={(e) =>
                            setLastName(e.target.value)
                        }
                        placeholder="Enter Last Name"
                        required
                    />
                    <label for="email">Enter Email* </label>
                    <input
                        type="email"
                        name="email"
                        id="email"
                        value={email}
                        onChange={(e) =>
                            setEmail(e.target.value)
                        }
                        placeholder="Enter email"
                        required
                    />
                    <label for="tel">Contact*</label>
                    <input
                        type="tel"
                        name="contact"
                        id="contact"
                        value={contact}
                        onChange={(e) =>
                            setContact(e.target.value)
                        }
                        placeholder="Enter Mobile number"
                        required
                    />
                    <label for="gender">Gender*</label>
                    <input
                        type="radio"
                        name="gender"
                        value="male"
                        id="male"
                        checked={gender === "male"}
                        onChange={(e) =>
                            setGender(e.target.value)
                        }
                    />
                    Male
                    <input
                        type="radio"
                        name="gender"
                        value="female"
                        id="female"
                        checked={gender === "female"}
                        onChange={(e) =>
                            setGender(e.target.value)
                        }
                    />
                    Female
                    <input
                        type="radio"
                        name="gender"
                        value="other"
                        id="other"
                        checked={gender === "other"}
                        onChange={(e) =>
                            setGender(e.target.value)
                        }
                    />
                    Other
                    <label for="lang">
                        Your best Subject
                    </label>
                    <input
                        type="checkbox"
                        name="lang"
                        id="english"
                        checked={subjects.english === true}
                        onChange={(e) =>
                            handleSubjectChange("english")
                        }
                    />
                    English
                    <input
                        type="checkbox"
                        name="lang"
                        id="maths"
                        checked={subjects.maths === true}
                        onChange={(e) =>
                            handleSubjectChange("maths")
                        }
                    />
                    Maths
                    <input
                        type="checkbox"
                        name="lang"
                        id="physics"
                        checked={subjects.physics === true}
                        onChange={(e) =>
                            handleSubjectChange("physics")
                        }
                    />
                    Physics
                    <label for="file">Upload Resume*</label>
                    <input
                        type="file"
                        name="file"
                        id="file"
                        onChange={(e) =>
                            setResume(e.target.files[0])
                        }
                        placeholder="Enter Upload File"
                        required
                    />
                    <label for="url">Enter URL*</label>
                    <input
                        type="url"
                        name="url"
                        id="url"
                        onChange={(e) =>
                            setUrl(e.target.value)
                        }
                        placeholder="Enter url"
                        required
                    />
                    <label>Select your choice</label>
                    <select
                        name="select"
                        id="select"
                        value={selectedOption}
                        onChange={(e) =>
                            setSelectedOption(
                                e.target.value
                            )
                        }
                    >
                        <option
                            value=""
                            disabled
                            selected={selectedOption === ""}
                        >
                            Select your Ans
                        </option>
                        <optgroup label="Beginers">
                            <option value="1">HTML</option>
                            <option value="2">CSS</option>
                            <option value="3">
                                JavaScript
                            </option>
                        </optgroup>
                        <optgroup label="Advance">
                            <option value="4">React</option>
                            <option value="5">Node</option>
                            <option value="6">
                                Express
                            </option>
                            <option value="t">
                                MongoDB
                            </option>
                        </optgroup>
                    </select>
                    <label for="about">About</label>
                    <textarea
                        name="about"
                        id="about"
                        cols="30"
                        rows="10"
                        onChange={(e) =>
                            setAbout(e.target.value)
                        }
                        placeholder="About your self"
                        required
                    ></textarea>
                    <button
                        type="reset"
                        value="reset"
                        onClick={() => handleReset()}
                    >
                        Reset
                    </button>
                    <button
                        type="submit"
                        value="Submit"
                        onClick={(e) => handleSubmit(e)}
                    >
                        Submit
                    </button>
                </form>
            </fieldset>
        </div>
    );
}

export default App;

Output: This output will be visible on localhost:3000/ on the browser window.

Create a Random Joke using React app through API

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