a:before {
     content: "\f055";
     font-family: FontAwesome;
     left:0;
     position:absolute;
     top:0;
}

示例链接: https://codepen.io/bungeedesign/pen/XqeLQg

获取图标代码: https://fontawesome.com/cheatsheet?from=io

你可以在CSS中使用unicode。如果你使用字体awesome 5，这是语法;

.login::before {
    font-family: "Font Awesome 5 Free"; 
    font-weight: 900; 
    content: "\f007";  
}

你可以在这里看到他们的文档。

a:before {
     content: "\f055";
     font-family: FontAwesome;
     left:0;
     position:absolute;
     top:0;
}

示例链接: https://codepen.io/bungeedesign/pen/XqeLQg

获取图标代码: https://fontawesome.com/cheatsheet?from=io

你应该将Font -weight设置为900来使Font Awesome 5 Free Font -family正常工作。

这是工作中的一个:

.css-selector::before {
   font-family: 'Font Awesome 5 Free';
   content: "\f101";
   font-weight: 900;
}

正如FontAwesome网站上所说的，FontAwesome =>

HTML:

<span class="icon login"></span> Login</li>

CSS:

 .icon::before {
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
  }

    .login::before {
        font-family: "Font Awesome 5 Free";
        font-weight: 900;
        content: "\f007";
   }

在。login::before ->中编辑内容:";以适应您的unicode。

下面是我的webpack 4 +字体很棒的解决方案:

webpack插件:

new CopyWebpackPlugin([
    { from: 'node_modules/font-awesome/fonts', to: 'font-awesome' }
  ]),

全局CSS样式:

@font-face {
    font-family: 'FontAwesome';
    src: url('/font-awesome/fontawesome-webfont.eot');
    src: url('/font-awesome/fontawesome-webfont.eot?#iefix') format('embedded-opentype'),
    url('/font-awesome/fontawesome-webfont.woff2') format('woff2'),
    url('/font-awesome/fontawesome-webfont.woff') format('woff'),
    url('/font-awesome/fontawesome-webfont.ttf') format('truetype'),
    url('/font-awesome/fontawesome-webfont.svgfontawesomeregular') format('svg');
    font-weight: normal;
    font-style: normal;
}

i {
    font-family: "FontAwesome";
}