Font Awesome 5 shows empty square when using the JS+SVG version

问题

Attempting to replace the bullet type on an list item tag with a Font Awesome icon but I am getting an empty square:

ul {
  list-style: none;
}

.testitems {
  line-height: 2em;
}

.testitems:before {
  font-family: "Font Awesome 5 Free";
  content: "\f058";
  margin: 0 5px 0 -15px;
  color: #004d00;
  display: inline-block;
}

<script src="https://use.fontawesome.com/releases/v5.8.1/js/all.js"></script>
<ul>
  <li class="testitems">List Item 1</li>
  <li class="testitems">List Item 2</li>
  <li class="testitems">List Item 3</li>
  <li class="testitems">List Item 4</li>
  <li class="testitems">List Item 5</li>
</ul>

I know the font library is loading because I was able to use <i class="fas fa-check-circle"></i><li class="testitems">List Item 1</li> and the font rendered properly (though not styled properly).

回答1:

Using the last release of the Font Awesome 5 you can enable the use of pseudo-element with the JS version by adding data-search-pseudo-elements like below:

ul {
  list-style: none;
}

.testitems {
  line-height: 2em;
}

.testitems:before {
  font-family: "Font Awesome 5 Free";
  content: "\f058";
  display:none; /* We need to hide the pseudo element*/
}
/*target the svg for styling*/
.testitems svg {
  color: blue;
  margin: 0 5px 0 -15px;
}

<script data-search-pseudo-elements src="https://use.fontawesome.com/releases/v5.8.1/js/all.js"></script>
<ul>
  <li class="testitems">List Item 1</li>
  <li class="testitems">List Item 2</li>
  <li class="testitems">List Item 3</li>
  <li class="testitems">List Item 4</li>
  <li class="testitems">List Item 5</li>
</ul>
<i class="fa fa-user"></i>

You can check the documentation for more details :

If you’re using our SVG + JS framework to render icons, you need to do a few extra things:

Enable Pseudo Elements

Using CSS Pseudo elements to render icons is disabled by default when using our SVG + JS Framework. You’ll need to add the <script data-search-pseudo-elements ... > attribute to the <script /> element that calls Font Awesome.

Set Pseudo Elements’ display to none

Since our JS will find each icon reference (using your pseudo element styling) and insert an icon into your page’s DOM automatically, we’ll need to hide the real CSS-created pseudo element that’s rendered.

Old answer

As you may see in this question Using Font Awesome icon for bullet points, with a single list item element You can easily set icon using content and pseudo-element but you need to pay attention as the Font Awesome 5 is using SVG and this trick won't work if you use the recommended JS version:

ul {
  list-style: none;
}

.testitems {
  line-height: 2em;
}

.testitems:before {
  font-family: "Font Awesome 5 Free";
  content: "\f058";
  margin: 0 5px 0 -15px;
  color: #004d00;
  display: inline-block;
}

<script defer src="https://use.fontawesome.com/releases/v5.0.6/js/all.js"></script>
<ul>
  <li class="testitems">List Item 1</li>
  <li class="testitems">List Item 2</li>
  <li class="testitems">List Item 3</li>
  <li class="testitems">List Item 4</li>
  <li class="testitems">List Item 5</li>
</ul>
<i class="fa fa-user"></i>

So in order to obtain what you want you need to load the CSS version which contains the font and the old way of using icons:

ul {
  list-style: none;
}

.testitems {
  line-height: 2em;
}

.testitems:before {
  font-family: "Font Awesome\ 5 Free";
  content: "\f058";
  margin: 0 5px 0 -15px;
  color: #004d00;
  display: inline-block;
}

<link href="https://use.fontawesome.com/releases/v5.0.6/css/all.css" rel="stylesheet">
<ul>
  <li class="testitems">List Item 1</li>
  <li class="testitems">List Item 2</li>
  <li class="testitems">List Item 3</li>
  <li class="testitems">List Item 4</li>
  <li class="testitems">List Item 5</li>
</ul>
<i class="fa fa-user"></i>

回答2:

As stated in the docs of Font Awesome of how to enable Pseudo class...

ul {
  list-style: none;
}

.testitems {
  line-height: 2em;
}

.testitems::before {
  font-family: "Font Awesome 5 Solid";
  content: "\f058";
  display: none;
}
.user::before{
  font-family: "Font Awesome 5 Solid";
  content: "\f007";
  display: none;
}

<script>FontAwesomeConfig = { searchPseudoElements: true };</script>
<script defer src="https://use.fontawesome.com/releases/v5.0.6/js/all.js"></script>
<ul>
  <li class="testitems">List Item 1</li>
  <li class="testitems">List Item 2</li>
  <li class="testitems">List Item 3</li>
  <li class="testitems">List Item 4</li>
  <li class="testitems">List Item 5</li>
</ul>
<i class="fa fa-user"></i><br>
<a class="user" href="#">User</a>

来源：https://stackoverflow.com/questions/48753688/font-awesome-5-shows-empty-square-when-using-the-jssvg-version

标签

css

font-awesome

font-awesome-5