How to Set Box Shadow in React JS ?

The CSS property box-shadow is used to set box shadow in React. This can apply to any React.js component. The CSS box-shadow property creates shadow effects around an element's frame possible to set several effects at once by separating them with commas. A box shadow is defined by the element's X and Y offsets, blur and spread radius, and color. In this article, we'll look at how to create a box shadow.

Prerequisites

• Knowledge of React JS
• Node and NPM installed in the system

Steps to Create React Application:

Step 1: Create a react application by using this command

npx create-react-app boxshadow-project

Step 2: After creating your project folder, i.e. boxshadow-project, use the following command to navigate to it:

cd react-project

Project Structure:

Example 1:  In this example, the App component uses useState hook to create a showBox state variable, initially set to false. The handleClick function toggles showBox value on button click. Code returns a button invoking the handleClick function on click, and an inline conditional rendering shows a green text header and a paragraph in a div with class "box" if showBox is true.

/*App.css*/ 

body {
     margin: 1rem;
 }

 .button {
     padding: 12px 24px;
     background-color: green;
     border-radius: 10px;
     border: none;
     color: #fff;
     font-size: 16px;
     cursor: pointer;
     /* Box Shadow */
     box-shadow: 1px 1px 10px 1px grey;
 }

 .box {
     border-radius: 10px;
     margin-top: 1rem;
     width: 50%;
     height: 150px;
     padding: 10px 10px 10px 10px;
     background-color: #f5f5f5;
     border: 1px solid #ccc;
     /* Box Shadow */
     box-shadow: 1px 1px 10px 0px red;
 }

// App.js

import React, { useState } from "react";
import "./App.css";
function App() {
    const [showBox, setShowBox] = useState(false);

    const handleClick = () => {
        setShowBox(!showBox);
    };

    return (
        <>
            <button className="button" 
                onClick={handleClick}>
                Box Shadow
            </button>
            {showBox && (
                <div className="box">
                    <h1 style={{ color: "green" }}>
                        Welcome To Geeksforgeeks!!
                    </h1>
                    <p>
                        <!-- Content goes here -->
                    </p>
                </div>
            )}
        </>
    );
}

export default App;

To run the application, open the Terminal and enter the command listed below. Go to http://localhost:3000/ to see the output.

npm start

Output:

Example 2: This example is the same as the previous example but the difference is that in one previous example, we use onclick function to show the box shadow on a content box but in this example, we use :hover to show the box shadow. When the user hovers over box content it will show a box shadow.  To run this code follow the same step which is previously mentioned.

/*App.css*/

body {
    margin: 2rem;
}

.box {
    border-radius: 10px;
    margin-top: 1rem;
    width: 50%;
    height: 150px;
    padding: 10px 10px 10px 10px;
    background-color: #f5f5f5;
    border: 1px solid #ccc;
    transition: linear all 0.4s;
    cursor: pointer;
}

/* Box shadow */
.box:hover {
    box-shadow: 1px 1px 10px 0px red;
}

// App.js

import React from "react";
import "./App.css";

function App() {
    return (
        <>
            <div className="box">
                <h1 style={{ color: "green" }}>
                    Welcome To Geeksforgeeks!!
                </h1>
                <p>
                    A Computer Science portal for 
                    geeks. It contains well written, 
                    well thought and well explained 
                    computer science and programming 
                    articles
                </p>
            </div>
        </>
    );
}

export default App;

Output: