Font Awesome 5 - why icons like bitcoin, facebook, twitter aren't showing?

问题

Is it only me that cannot render bitcoin and facebook icons in version 5.0.8 ?

<link rel="stylesheet" type="text/css" href="https://use.fontawesome.com/releases/v5.0.8/css/fontawesome.css">
<i class="fa fa-btc"></i>
<i class="fa fa-bitcoin"></i>
<i class="fa fa-facebook"></i>
<i class="fa fa-facebook-f"></i>

回答1:

You also need to use the brands.css stylesheet in font-awesome 5.0.8. Additionally, you need to make sure your class names are up to date. Try the snippet below:

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/brands.css" integrity="sha384-IiIL1/ODJBRTrDTFk/pW8j0DUI5/z9m1KYsTm/RjZTNV8RHLGZXkUDwgRRbbQ+Jh" crossorigin="anonymous">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/fontawesome.css" integrity="sha384-q3jl8XQu1OpdLgGFvNRnPdj5VIlCvgsDQTQB6owSOHWlAurxul7f+JpUOVdAiJ5P" crossorigin="anonymous">

<i class="fab fa-btc"></i>
<i class="fab fa-bitcoin"></i>

Alternatively, you can just use the all.css stylesheet to include all the styles

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/all.css" integrity="sha384-3AB7yXWz4OeoZcPbieVW64vVXEwADiYyAEhwilzWsLw+9FgqpyjjStpPnpBO8o8S" crossorigin="anonymous">

回答2:

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/all.css" integrity="sha384-3AB7yXWz4OeoZcPbieVW64vVXEwADiYyAEhwilzWsLw+9FgqpyjjStpPnpBO8o8S" crossorigin="anonymous">
<i class="fab fa-btc"></i>
<i class="fab fa-bitcoin"></i>

回答3:

You need to load all the icon type as the bitcoin belong to the brand ones. As you can see below you can choose pack of icon you want to load: https://fontawesome.com/get-started/web-fonts-with-css

You also need to use fab not fa. https://fontawesome.com/how-to-use/web-fonts-with-css

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/all.css" >
<i class="fab fa-btc"></i>
<i class="fab fa-bitcoin"></i>
<i class="fab fa-facebook"></i>
<i class="fab fa-facebook-f"></i>

来源：https://stackoverflow.com/questions/49479641/font-awesome-5-why-icons-like-bitcoin-facebook-twitter-arent-showing