How to avoid CSS conflicts inside React components?

Issue

I have a React project which has two pages and each page has its own css file.

Page1.jsx -> Page1.css
Page2.jsx -> Page2.css

Each css file is only included in its corresponding jsx file. Both css files share similar class names (example: column, image-place, etc.). The problem is that Page1 is affected by Page2's CSS file.

I am not expert in front-end technologies. Any help will be appreciated.

Solution

Are you using create-react-app?

If so, use css-modules instead https://create-react-app.dev/docs/adding-a-css-modules-stylesheet/

CSS Modules allows the scoping of CSS by automatically creating a unique classname

//Page1.jsx
import React from 'react';
import styles from './page1.module.css'; // Import css modules stylesheet as styles

export const Page1 = () => {
  return (
    <div className={styles.column}>page1</div>
  )
}

/* page1.module.scss */
.column {
  color: red
}

//Page2.jsx
import React from 'react';
import styles from './page2.module.css'; // Import css modules stylesheet as styles

export const Page2 = () => {
  return (
    <div className={styles.column}>page2</div>
  )
}

/* page2.module.scss */
.column {
  color: green
}

If you want to combine them with normal or external css class (bootstrap, tailwind, etc), try this:

<div className={`${styles.column} overflow-auto`}>page1</div>

Answered By - Andara