@fortawesome/react-fontawesome图标无法调整大小问题求助

Hey Luis, let's break down why your Font Awesome icon styles are acting up and fix them properly—no more messy transform: scale() hacks needed!

First, Fix the Syntax Error in Your style Prop #

Looking at your code, I spot a small but critical mistake: you’ve nested a second style object inside the first one. That’s invalid JSX syntax, and it’s almost certainly why your inline styles aren’t applying at all.

Your original code:

<section className="container-center">
  <FontAwesomeIcon 
    icon="arrow-down" 
    style={{ color: "var(--themeP)", style={{ fontSize: "1.5rem" }} }} 
  />
</section>

Fixed version: Combine all style properties into a single object:

<section className="container-center">
  <FontAwesomeIcon 
    icon="arrow-down" 
    style={{ color: "var(--themeP)", fontSize: "1.5rem" }} 
  />
</section>

This is probably why your other project works—you didn’t make this syntax mistake there!

Fix the fa-w-14 Class Not Working #

The fa-w-14 class is auto-generated by Font Awesome to set a fixed width for the icon, but it won’t do anything unless you’ve imported the core Font Awesome CSS.

Add this import to your project’s entry file (like index.js or App.js):

import '@fortawesome/fontawesome-svg-core/styles.css';

Without this CSS, all those auto-generated utility classes (like fa-w-14) have no styles attached to them, which makes your icon blow out of proportion.

Why the size Prop Isn’t Working #

If fixing the syntax and importing CSS doesn’t get the size prop working, check for these issues:

• Global style conflicts: Look for global CSS rules targeting <svg> elements (e.g., svg { width: 100% !important; }). These can override Font Awesome’s built-in size styles. To fix this, add a custom class to your icon and use a more specific selector:

  <FontAwesomeIcon icon="arrow-down" className="custom-arrow-icon" />
  

  .custom-arrow-icon {
    font-size: 1.5rem !important; /* Or use your preferred size */
  }
  

• Incorrect size prop usage: In v5.12.1 of react-fontawesome, the size prop expects values like lg, 2x, 3x, etc., not raw CSS values. If you want a custom size, stick with the fixed style prop or custom CSS classes.

Last Resort: Reinstall Dependencies #

If none of the above works, there might be a corrupted dependency cache. Try:

1. Delete your node_modules folder and package-lock.json file
2. Run npm install to reinstall all dependencies
   This ensures you have exactly the same working versions as your other project.

内容的提问来源于stack exchange，提问作者Luis Febro