font-face mixin — all font formats are mandatory for mixin to work

[kvidek]

mixins/_fonts.scss (L:1)

@mixin font-face($font-name, ...) {
    ...
}

mixin requires all formats, should ignore if a file format does not exist (e.g. not all fonts have .woff2 format)

[igorbumba]

@font-face {
  font-family: 'MyWebFont';
  src: url('webfont.eot'); /* IE9 Compat Modes */
  src: url('webfont.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
       url('webfont.woff2') format('woff2'), /* Super Modern Browsers */
       url('webfont.woff') format('woff'), /* Pretty Modern Browsers */
       url('webfont.ttf')  format('truetype'), /* Safari, Android, iOS */
       url('webfont.svg#svgFontName') format('svg'); /* Legacy iOS */
}

As you can see woff2 is for the Super Modern Browsers. I think that this format was meant for the latest release(s) of the browser(s)? New Chrome, Firefox, etc.

Can we exclude SVG file format?

[renatoruk]

https://caniuse.com/#feat=woff2 Support for woff2 greatly increased since that mixin was initially developed, I believe.

Here are referenced current best practices for webfont loading, and basically summary is:

url('/fonts/awesome.woff2') format('woff2'), 
url('/fonts/awesome.woff') format('woff'),
url('/fonts/awesome.ttf') format('truetype'),
url('/fonts/awesome.eot') format('embedded-opentype');

Browsers will fallback to eot if they fail to use modern versions so we should change that.

But I agree, we could set another parameter for specifying font types to use and ditch the SVG completely.

[renatoruk]

Also, we need to add parameters for font-weight and font-style so the same font names can be used.