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fontawesome-subset

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Creates subsets of FontAwesome fonts for optimized use on the web.

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# FontAwesome Subset

Love FontAwesome but don't need thousands of icons bundled on every page of the site? Me either. `fontawesome-subset` is a utility for creating subsets of FontAwesome for optimized use on the web. It works by taking glyph names that you've used (`angle-left`, `caret-up`, etc) and creating an optimized font with only the glyphs you need. Yes, SVG icons and fragments are fancier and more feature filled - but if you already have a website built using the webfont - why switch -- right?

## Installation

First, install fontawesome-subset:

```sh
npm install --save-dev fontawesome-subset
```

Second, install the edition of FontAwesome you plan on using. **Versions >=5.12.0 are currently supported.** If you're using the Pro version, see [below](#using-with-fontawesome-pro). For the free version, use the following:

```sh
npm install --save-dev @fortawesome/fontawesome-free
```

## Usage

Run via your favorite task runner:

```typescript
// Import fontawesome-subset
import { fontawesomeSubset } from "fontawesome-subset";

// Create or append a task to be ran with your configuration
fontawesomeSubset(["check", "square", "caret-up"], "sass/webfonts");
```

### Full Options

#### fontawesomeSubset(subset, output_dir, options)

-   `subset` - Array containing list of icon identifiers (icon or glyph names, unicode value, or a supported alias) that you want to generate for the `solid` style. This can also be an object with key->value pairs for different FA styles (solid, regular¹, brands, light¹, duotone¹, sharp-solid¹). Some Icons in these **¹** subsets are only available when used with FontAwesome Pro (see [below](#using-with-fontawesome-pro)).
-   `output_dir` - Directory that you want the webfonts to be generated in. Relative to current NPM process. Ex: `sass/webfonts`
-   `options` - Object of options to further customize the tool.
    -   `package` - `free` or `pro` . Defaults to `free` version. See [below](#using-with-fontawesome-pro) for Pro instructions.
    -   `targetFormats` - A string array of one or more formats to export. Available options: `woff` `woff2` `sfnt` (`ttf`). Defaults to `woff2` & `sfnt`.

### Using with FontAwesome Pro

FontAwesome (FA) Pro provides numerous additional icons, as well as additional font weights & styles that you can use. Obviously, you'll need to own the 'Pro' version of FA in order to use with this subsetting tool. If you've already purchased a license, follow the [installation instructions](https://fontawesome.com/docs/web/setup/packages) for getting FontAwesome Pro up and running through NPM.

After installation, you can supply additional information to the `subset` parameter of `fontawesomeSubset` to create families for specific font styles. Make sure to include `package: 'pro'` inside the options parameter to generate from the Pro source instead and enable font creation for different weights / styles.

#### Example generating separate glyphs for 'regular' and 'solid' styles:

```javascript
fontawesomeSubset(
    {
        regular: [
            "check",
            "square",
            "caret-up",
            "f007" /* fa-user unicode */,
            "add" /* fa-plus alias */,
        ],
        solid: ["plus", "minus"],
    },
    "sass/webfonts",
    {
        package: "pro",
    }
);
```

You can use any of the weights / sets provided by FontAwesome Pro including `solid`, `regular`, `light`, `brands`, `duotone`, `sharp-*` and `sharp-duotone-*`. You can mix and match and provide as many glyphs as you plan on using to trim it down. See the full list of supported subsets in [`types.ts`](https://github.com/omacranger/fontawesome-subset/blob/master/src/types.ts#L14).

The above example would output a directory with the following structure:

```
/sass/
    /webfonts/
        fa-regular-400.ttf
        fa-regular-400.woff2
        fa-solid-900.ttf
        fa-solid-900.woff2
```

It is still up to you to determine which glyphs you need and to pass them to the function to generate the webfonts. I recommend optimizing your CSS files as well to get the most from the tool.

### Using with SCSS / SASS

If you already have FA installed on your server in relation to your NPM project, you can point the `output_dir` to the webfonts directory that you're already loading and the script will overwrite the current fonts with the newly minified / optimized versions. If you plan on getting a bit more granular you can always edit the `_icons.scss` file provided by the FA team and remove all glyphs that you're not using to save a few more KBs for your end user.

Here's an example of the `_icons.scss` file on a project I've worked on using a sass map for the glyph name `->` variable provided in the `_variables.scss` file:

```scss
$icons: (
    shopping-cart: $fa-var-shopping-cart,
    chevron-right: $fa-var-chevron-right,
    chevron-left: $fa-var-chevron-left,
    chevron-down: $fa-var-chevron-down,
    check-square: $fa-var-check-square,
    square: $fa-var-square,
    caret-up: $fa-var-caret-up,
    plus: $fa-var-plus,
    minus: $fa-var-minus,
    times: $fa-var-times,
    search: $fa-var-search,
    check: $fa-var-check,
);

@each $key, $value in $icons {
    .#{$fa-css-prefix}-#{$key}:before {
        content: fa-content($value);
    }
}
```

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