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“Width” (wdth in CSS) is an axis found in some variable fonts. It controls the font file’s width parameter.
The Google Fonts CSS v2 API defines the axis as:
| Default: | Min: | Max: | Step: |
|---|---|---|---|
| 100 | 25 | 200 | 0.1 |
Width is the result of how much horizontal space is taken up by a typeface’s characters. A condensed face takes up considerably less space than a wide one.
In CSS, we can assign a variable width to an element of our choosing using the font-stretch property. (Despite the name, note that the type is never literally “stretched” by browsers. This property name was chosen to make the concept more accessible to a general audience.)
p {
font-stretch: 50%;
}
strong {
font-stretch: 193%;
}
Here, our text will be quite narrow—the type designer has set 50% as half of the regular (100%) width—and the strong text will be almost twice the width of the regular. Width values are always above 0, with 100% being the regular width.
In line with the current CSS spec, the four-character code for this axis should be referenced in UPPERCASE (as only the five axes registered in the OpenType format specification should appear in lowercase). Also, when using the Google Fonts API, the lowercase axes have to appear first in the URL, followed by the uppercase, each in alphabetical order.