O font awesome icon Usage,CSS Class Name,SVG & CSS Content Code

O font awesome icon css class name is fa-o and CSS Content Code is \4f.

O font awesome icon is part of solid icons.

O font awesome icon usage

We can display O font awesome icon using 3 different ways depending upon our requirement.

1. Using CSS Class Name

2. Using CSS Content Code

3. Using SVG

O font awesome icon CSS class name

To display O font awesome icon, add predefined class name i.e.,fa-o (with prefix fa-) to the i tag.

And we need to add corresponding font awesome icon style for the O icon.

O icon has 1 icon style i.e.,solid. We need to append icon style class fas.

<i class='fas fa-o'></i>

O font awesome icon CSS Content Code

We can display O font awesome icon using it’s CSS Content Code \4f

Use the following HTML code

<li><span class='O fontawesomeicon'></span>O</li>

Apply CSS code

<style> 
.fontawesomeicon::before {
    display: inline-block;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
 }

.O::before {
   font: var(--fa-font-solid);
    content: ' \4f';
 }</style>

For the detailed tutorial visit https://www.angularjswiki.com/fontawesome/csscontentcode/

O font awesome icon SVG

Use the following icon SVG to display O font awesome icon.

<svg class='fontawesomesvg' xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc. --><path d="M224 96C135.6 96 64 167.6 64 256s71.6 160 160 160s160-71.6 160-160s-71.6-160-160-160zM0 256C0 132.3 100.3 32 224 32s224 100.3 224 224s-100.3 224-224 224S0 379.7 0 256z"/></svg>

Use the following HTML code

<p>This <svg class='fontawesomesvg' xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.2.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2022 Fonticons, Inc. --><path d="M224 96C135.6 96 64 167.6 64 256s71.6 160 160 160s160-71.6 160-160s-71.6-160-160-160zM0 256C0 132.3 100.3 32 224 32s224 100.3 224 224s-100.3 224-224 224S0 379.7 0 256z"/></svg>
 O displayed using SVG</p>

Apply CSS code

  <style>
    .fontawesomesvg {width: 1em;
      height: 1em;
      vertical-align: -.125em;
    }
  </style>

Change O font awesome icon size

To increase O font awesome icon size, use the fa-lg(33 % increase), fa-2x, fa-3x, fa-4x, or fa-5x classes along with icon class \4f. Increase in icon size will be relative to their parent container.

<i class='fas fa-o fa-lg'>fa-lg</i><br/>
<i class='fas fa-o fa-2x'>fa-2x</i><br/>
<i class='fas fa-o fa-3x'>fa-3x</i><br/>
<i class='fas fa-o fa-4x'>fa-4x</i><br/>
<i class='fas fa-o fa-5x'>fa-5x</i><br/>

O font awesome icon with Fixed Width

All the font awesome icons does not have same width.

For example O icon and home icon may not have same height and width.

So to display two icons with fixed width and height we can use fa-fw class.

<i style='border:1px solid;' class='fas fa-o fa-fw fa-3x'></i>Fixed Width<i style='border:1px solid;' class='fas fa-o fa-3x'></i>Normal<br/>
<i style='border:1px solid;' class='fas fa-home fa-fw fa-3x'></i>Fixed Width<i style='border:1px solid;' class='fas fa-home fa-3x'></i>Normal<br/>

O font awesome icon Border

To add border to O font awesome icon, use fa-border class.

<i class='fas fa-o fa-border fa-3x'></i>

Pull O font awesome icon To the left

To pull O icon to the left of the container use fa-pull-left class.

<div style='width: 200px;'>
<i class='fas fa-o fa-pull-left fa-3x'></i>
  ... The text after O Icon will be displayed on the right side of the icon.
</div>
<div style = 'clear: both;'></div>

Pull O font awesome icon To the left

To pull O icon to the right of the container use fa-pull-right class.

<div style='width: 200px;'>
<i class='fas fa-o fa-pull-right fa-3x'></i>
  ... The text after O Icon will be displayed on the left side of the icon.
</div>
<div style = 'clear: both;'></div>

Animate O font awesome icon

To animate O font awesome icon, use fa-spin class.

<i class='fas fa-o fa-spin fa-3x'></i>

Animate O font awesome icon with steps

While animating the font awesome icon,We can rotate O icon in 8 steps instead of uniform rotation.

We can use fa-pulse icon along with fa-spin class.

<i class='fas fa-o fa-spin fa-pulse fa-3x'></i>

Rotate O font awesome icon

To rotate O font awesome icon, Use fa-rotate-x class

Where ‘x’ represents degree of rotation.

<div>
<i class='fas fa-o fa-3x'>R</i>normal<br/><br/>
<i class='fas fa-o fa-rotate-90 fa-3x'>R</i> fa-rotate-90<br/><br/> 
<i class='fas fa-o fa-rotate-180  fa-3x'>R</i> fa-rotate-180<br/><br/> 
<i class='fas fa-o fa-rotate-270 fa-3x'>R</i> fa-rotate-270<br/><br/>
</div>

Flip O font awesome icon

To flip O font awesome icon horizontally and vertically use fa-flip-horizontal and fa-flip-vertical classes.

<div>
<i class='fas fa-o fa-3x'>F</i> Normal <br>
<i class='fas fa-o fa-flip-horizontal fa-3x'>F</i> fa-flip-horizontal<br>
<i class='fas fa-o fa-flip-vertical fa-3x'>F</i> fa-flip-vertical<br>
</div>

Combine O font awesome icon with other font awesome icons

In font awesome icons,using stacking we can combine multiple icons and display it as one icon.

To do that use the fa-stack class on the parent, the fa-stack-1x for the regularly sized icon, and fa-stack-2x for the larger icon.

And use class fa-inverse for an alternative icon color.

In the below example, I am displaying O font awesome icon on top of icons like fa-square,fa-circle and fa-ban.

And used fa-inverse in the second example to invert the color of the icon.

<div>
    <span class='fa-stack fa-lg'>
        <i class='far fa-square fa-stack-2x'></i>
        <i class='fas fa-o fa-stack-1x'></i>
    </span>
      O on fa-square<br>
    <span class='fa-stack fa-lg'>
        <i class='fas fa-circle fa-stack-2x'></i>
        <i class='fas fa-o fa-stack-1x fa-inverse'></i>
    </span>
      O on fa-circle<br>

    <span class='fa-stack fa-lg'>
        <i class='fas fa-o fa-stack-1x'></i>
        <i class='fas fa-ban fa-stack-2x'></i>
    </span>
      O on fa-ban
</div>