Leveraging SASS for injecting a variable into a mixin where the declaration is in string format

I have been developing a SASS mixin that allows for the input of various variables to construct a font-awesome declaration in the following format:

@mixin after-font-awesome($unicode, $size, $margin, $color, $weight) {
  &:after {
    content:$unicode;
    font-family:"FontAwesome";
    font-size:$size;
    color:$color;
    font-weight:$weight;
    margin:$margin;
    @content;
  }
}

The usage would look like this:

@include after-font-awesome('\f078', 15px, 0 0 0 0.3em, orange, 900) {}

To simplify the input process, I attempted to pass in only the unicode numbers, such as f078, and have it automatically formatted as '\f078' within the mixin. After exploring some documentation, I tried the following approaches:

@mixin after-font-awesome($unicode, $size, $margin, $color, $weight) {
  &:after {
    content:'\#{$unicode}';
    font-family:"FontAwesome";
    font-size:$size;
    color:$color;
    font-weight:$weight;
    margin:$margin;
    @content;
  }
}

or

@mixin after-font-awesome($unicode, $size, $margin, $color, $weight) {
  &:after {
    content:'\{$unicode}';
    font-family:"FontAwesome";
    font-size:$size;
    color:$color;
    font-weight:$weight;
    margin:$margin;
    @content;
  }
}

or

@mixin after-font-awesome($unicode, $size, $margin, $color, $weight) {
  &:after {
    content:'\$unicode';
    font-family:"FontAwesome";
    font-size:$size;
    color:$color;
    font-weight:$weight;
    margin:$margin;
    @content;
  }
}

Unfortunately, none of these approaches worked. I would appreciate any guidance or assistance in resolving this issue. Thank you.

Answer №1

I encountered a similar problem while working on my project.

$unicode: f0ca;
$withslash: "\"\\#{$unicode}\"";

I experimented with a solution found here. Hopefully, it will be useful to you as well.

Answer №2

The challenges surrounding the behavior of backslashes continue to be a persistent issue within the Sass community, as highlighted in ongoing discussions such as the one on Issue #1115 in LibSass.

While there have been various workarounds proposed in Issue #659 in Sass, it is important to note that their effectiveness can vary significantly depending on the Sass version and implementation being used. Andrewgrewell's solution has been well-received by many users, but it's recommended to experiment with different solutions to find what works best for your specific case. Check out the SassMeister Demo for a practical demonstration.

@mixin after-font-awesome($unicode, $size, $margin, $color, $weight) {
  &:after {
    content: #{"\"\\"}#{$unicode + "\""}; // <-- andrewgrewell's hack
    font-family: "FontAwesome";
    font-size: $size;
    color: $color;
    font-weight: $weight;
    margin: $margin;
    @content;
  }
}

// Usage
.selector {
  @include after-font-awesome('f078', 15px, 0 0 0 0.3em, orange, 900);
}

// CSS Output
.selector:after {
  content: "\f078";
  font-family: "FontAwesome";
  font-size: 15px;
  color: orange;
  font-weight: 900;
  margin: 0 0 0 0.3em;
}

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