Font Awesome 5 unicode

Question

Font Awesome 5 star icon has <i class="fas fa-star"></i> and <i class="far fa-star"></i> different is fas , far and Unicode for both is f005 now i want to use it as my rating system where first is regular star and by click become solid star, but how do I define this fas far in my css?

Code

input.star:checked ~ label.star:before {
              content: '\f005';
              color: #e74c3c;
              transition: all .25s;
              font-family: 'Font Awesome 5 Free';
              font-weight: 900;
}


label.star:before {
          content: '\f005';
          font-family: 'Font Awesome 5 Free';
          font-weight: 900;
}

with my codes above i only get solid star

Solution 1

^{If you are using the JS+SVG version read this: Font Awesome 5 shows empty square when using the JS+SVG version}

The difference between the regular and the solid version is the font-weight. You simply need to adjust this one to swap between both version:

input.star:checked ~ label.star:before {
  content: '\f005';
  color: #e74c3c;
  transition: all .25s;
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
}

label.star:before {
  content: '\f005';
  font-family: 'Font Awesome 5 Free';
  font-weight: 200;
}

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.13.0/css/all.css">

<input type="checkbox" class="star">
<label class="star"></label>

Here is another related question Font Awesome 5 on pseudo elements shows square instead of icon for more details.

Solution 2

Not 100% sure what type of star you wanted when in inactive/default state, so guessed that you needed the hollow star. You can change the appearance of FA5 icons dramatically by changing the font-weight to and from 400 or 900. I placed stars by the important comments in the demo. The remaining changes are just optional miscellaneous styles like text-shadows, 2 way transitions on :hover, etc. Although optional, you should try hiding the actual checkbox and just use the label, it's better aesthetically IMO.

Demo

input.star {
  /*⭐} By using the label as the interface (button) this can be hidden*/
  display: none;
}

.star {
  color: rgba(255, 255, 255, 0);
  text-shadow: .25px -.25px 1px #000;
  transition: .2s ease;
}

.star:hover {
  cursor: pointer;
  transition: .3s ease;
  text-shadow: -5px -6px 4px rgba(255, 142, 86, 0.6);
}

input.star:checked~label.star:hover {
  transition: .3s ease;
  text-shadow: -5px -6px 4px rgba(255, 142, 86, 0.6);
}

label.star::before {
  content: "\f005";
  /*⭐} Optional but recommended */
  color: #e74c3c;
  transition: all .25s;
  font-family: 'Font Awesome 5 Free';
  /*⭐} By lowering the font-weight, the icon is an outline */
  font-weight: 400;
  font-size: 32px;
}

input.star:checked~label.star::before {
  content: '\f005';
  color: #e74c3c;
  transition: all .25s;
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
}

<link href="https://use.fontawesome.com/releases/v5.0.6/css/all.css" rel="stylesheet">
<!------------{🌟} Follow this pattern so that the label acts as a
------------------ remote button to the hidden checkbox-->

<!--⭐} Set an #id on checkbox-->
<input id='lucky' class='star' type='checkbox'>

<!--⭐} Set a [for] attribute with the value of checkbox #id-->
<label for='lucky' class='star'></label>