## The CustomFontSource object

This object is used to pass custom fonts when creating an [Elements](/js/elements_object/create.md) object.

- `family` (string) **required**
  The name to give the font.

- `src` (string) **required**
  A valid [src](https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/src) value pointing to your custom font file.
This is usually (though not always) a link to a file with a `.woff` , `.otf`, or `.svg` suffix. The file must be hosted on https.

- `display` (string)
  A valid [font-display](https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/font-display) value.

- `style` (string)
  One of `normal`, `italic`, `oblique`.
Defaults to `normal`.

- `unicodeRange` (string)
  A valid [unicode-range](https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face/unicode-range) value.

- `weight` (string)
  A valid [font-weight](https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight).
Note that this is a string, not a number.