Font Awesome Google+图标无法显示，其余图标正常的技术求助

Hey there! It’s super frustrating when one icon refuses to show up while all others work perfectly—let’s break down the most likely fixes for your Google+ icon issue.

Common Causes & Solutions #

1. Font Awesome Version Mismatch (Most Likely!) #

Font Awesome made big changes to its icon library over versions, especially with social icons after Google+ was discontinued:

• If you’re using Font Awesome 4.x: The correct class name is fa fa-google-plus. Double-check you didn’t use typos like fa-google or fa-google-plus-g here—those are for newer versions.
• If you’re using Font Awesome 5.x/6.x Free: Google+ was removed from the Free library entirely. Only the Pro version includes it (with the class fab fa-google-plus-g). If you don’t have a Pro license, you’ll need either:
  • Downgrade to Font Awesome 4.7.0 (the last Free version that included Google+), or
  • Use a custom SVG/alternative icon for Google+ instead.

2. Incorrect Icon Class Structure #

Make sure you’re using the right prefix for your version:

• 4.x uses only the fa prefix: <a href="#"><i class="fa fa-google-plus"></i></a>
• 5.x/6.x Pro uses the fab (brand icons) prefix: <a href="#"><i class="fab fa-google-plus-g"></i></a>

3. Cache or Loading Issues #

Sometimes browsers cache old versions of Font Awesome files. Try:

• Clearing your browser’s cache and reloading the page
• Hard-refreshing (Ctrl+Shift+R or Cmd+Shift+R) to bypass cached assets
• Double-checking that your Font Awesome CDN link is loading the correct version (no typos in the URL!)

4. CSS Conflicts #

Rarely, custom CSS might be hiding the icon. Inspect the element in your browser’s dev tools to check:

• If the icon has display: none or opacity: 0 set
• If there’s a conflicting style overriding the Font Awesome font family

Quick Test #

To confirm it’s a version issue, try swapping your current Font Awesome CDN link for the 4.7.0 version:

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

Then use the class fa fa-google-plus—if the icon shows up, you know the problem was the newer Free version missing the icon.

内容的提问来源于stack exchange，提问作者Zap