How Do I Correctly Set Font-Families for Font Awesome Icons in CSS?

Determining the Correct Font-Family in Font Awesome Pseudo-Elements

Font Awesome 5 offers users a range of icon families, including Free, Solid, Brands, and Regular. Each family requires a specific font-family assignment in CSS pseudo-elements to display icons correctly.

Case 1: Brand Icon

When using a brand icon, such as the Twitter icon available at https://fontawesome.com/icons/twitter?style=brands, the correct font-family is "Font Awesome 5 Brands." This is because brand icons have a distinct visual style and are housed in a separate font family.

Case 2: Solid Icon

When attempting to display a solid icon, such as the phone icon available at https://fontawesome.com/icons/phone?style=solid, it's crucial to note that the correct font-family is not "Font Awesome 5 Solid." Solid icons actually belong to the same font-family as regular icons, which is "Font Awesome 5 Free."

The Correct Approach

Instead of assigning specific font-families for each icon style, it's recommended to include all the necessary font-families in a single line, separated by commas. This ensures that the browser will use the appropriate font based on the icon's style:

.icon {
  display: inline-block;
  font-style: normal;
  font-variant: normal;
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
  font-family: "Font Awesome 5 Brands", "Font Awesome 5 Free";
}

With this approach, the browser will prioritize the Brand font-family when encountering brand icons and the Free font-family when encountering solid or regular icons.

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