How to use CSS preprocessor in React and conditional styling in react

How To Use CSS Preprocessor In React?

We can import SCSS stylesheets in React just like you would with regular CSS stylesheets.

import "./MyComponent.scss"; // Import the SCSS file

const MyComponent = () => {
  return (
    <div className="myComponentContainer">
      <h1 className="myComponentTitle">Hello, I'm MyComponent!</h1>
      {/* Your component content goes here */}
    </div>
  );
};

export default MyComponent;

• Ensure that you have Sass installed in your project. You can install it using npm or yarn

# Using npm
npm install node-sass --save-dev

# Using yarn
yarn add node-sass --dev

• If you are using a bundler like Webpack, make sure it's configured to handle SCSS files.

// webpack.config.js

module.exports = {
  // Other webpack configurations...
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: ["style-loader", "css-loader", "sass-loader"],
      },
      // Other rules...
    ],
  },
};

---

How To Conditionally Add Styles And Classes In React?

There are several ways to conditionally add styles and classes to your React components. Here are a few approaches:

1. Using Ternary Operator

   function Button({ isActive }) {
     return (
       <button className={isActive ? "active" : "inactive"} style={{ backgroundColor: isActive ? "blue" : "gray" }}>
         Click me
       </button>
     );
   }

2. Using Template Literals

   function Button({ isActive }) {
     return (
       <button
         className={`button ${isActive ? "active" : ""}`}
         style={{ backgroundColor: `${isActive ? "blue" : "gray"}` }}
       >
         Click me
       </button>
     );
   }

3. Using the libraries: Libraries like clsx & classnames provides a convenient way to conditionally add classes.

   clsx

   import clsx from "clsx";
   
   function Button({ isActive }) {
     return (
       <button className={clsx("button", { active: isActive })} style={{ backgroundColor: isActive ? "blue" : "gray" }}>
         Click me
       </button>
     );
   }
   classnames

   import classnames from "classnames";
   
   function Button({ isActive }) {
     return (
       <button
         className={classnames("button", { active: isActive })}
         style={{ backgroundColor: isActive ? "blue" : "gray" }}
       >
         Click me
       </button>
     );
   }