Font format woff css

The Web Open Font Format (WOFF)

WOFF (the Web Open Font Format) is a web font format developed by Mozilla in concert with Type Supply, LettError, and other organizations. It uses a compressed version of the same table-based sfnt structure used by TrueType, OpenType, and Open Font Format, but adds metadata and private-use data structures, including predefined fields allowing foundries and vendors to provide license information if desired.

There are three main benefits to using WOFF:

1. The font data is compressed, so sites using WOFF will use less bandwidth and will load faster than if they used equivalent uncompressed TrueType or OpenType files.
2. Many font vendors that are unwilling to license their TrueType or OpenType format fonts for use on the web will license WOFF format fonts. This improves availability of fonts to site designers.
3. Both proprietary and free software browser vendors like the WOFF format, so it has the potential of becoming a truly universal, interoperable font format for the web, unlike other current font formats.

There are two versions of WOFF: WOFF and WOFF2. They mostly differ in regard to the compression algorithm used. In @font-face they are identified by the ‘woff’ and ‘woff2’ format descriptor respectively.

Using WOFF

You can use the @font-face CSS property to use WOFF fonts for text in web content. It works exactly like OpenType and TrueType format fonts do, except it will likely let your content download more efficiently due to the addition of compression.

Tools for working with WOFF fonts

Specifications

Browser compatibility

css.at-rules.font-face.WOFF

BCD tables only load in the browser

css.at-rules.font-face.WOFF_2

BCD tables only load in the browser

See also

Found a content problem with this page?

This page was last modified on Jul 4, 2023 by MDN contributors.

Your blueprint for a better internet.

MDN

Support

Our communities

Developers

Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
Portions of this content are ©1998– 2023 by individual mozilla.org contributors. Content available under a Creative Commons license.

Источник

@font-face

The @font-face CSS at-rule specifies a custom font with which to display text; the font can be loaded from either a remote server or a locally-installed font on the user’s own computer.

Syntax

@font-face  font-family: "Trickster"; src: local("Trickster"), url("trickster-COLRv1.otf") format("opentype") tech(color-COLRv1), url("trickster-outline.otf") format("opentype"), url("trickster-outline.woff") format("woff"); > 

Descriptors

Defines the ascent metric for the font.

Defines the descent metric for the font.

Determines how a font face is displayed based on whether and when it is downloaded and ready to use.

Specifies a name that will be used as the font face value for font properties.

A font-stretch value. Accepts two values to specify a range that is supported by a font-face, for example font-stretch: 50% 200%;

A font-style value. Accepts two values to specify a range that is supported by a font-face, for example font-style: oblique 20deg 50deg;

A font-weight value. Accepts two values to specify a range that is supported by a font-face, for example font-weight: 100 400;

Note: The font-variant descriptor was removed from the specification in 2018. The font-variant value property is supported, but there is no descriptor equivalent.

Allows control over advanced typographic features in OpenType fonts.

Allows low-level control over OpenType or TrueType font variations, by specifying the four letter axis names of the features to vary, along with their variation values.

Defines the line gap metric for the font.

Defines a multiplier for glyph outlines and metrics associated with this font. This makes it easier to harmonize the designs of various fonts when rendered at the same font size.

Specifies references to font resources including hints about the font format and technology. It is required for the @font-face rule to be valid.

The range of Unicode code points to be used from the font.

Description

It’s common to use both url() and local() together, so that the user’s installed copy of the font is used if available, falling back to downloading a copy of the font if it’s not found on the user’s device.

If the local() function is provided, specifying a font name to look for on the user’s device, and if the user agent finds a match, that local font is used. Otherwise, the font resource specified using the url() function is downloaded and used.

Browsers attempt to load resources in their list declaration order, so usually local() should be written before url() . Both functions are optional, so a rule block containing only one or more local() without url() is possible. If a more specific fonts with format() or tech() values are desired, these should be listed before versions that don’t have these values, as the less-specific variant would otherwise be tried and used first.

By allowing authors to provide their own fonts, @font-face makes it possible to design content without being limited to the so-called «web-safe» fonts (that is, the fonts which are so common that they’re considered to be universally available). The ability to specify the name of a locally-installed font to look for and use makes it possible to customize the font beyond the basics while making it possible to do so without relying on an internet connection.

Note: Fallback strategies for loading fonts on older browsers are described in the src descriptor page.

The @font-face at-rule may be used not only at the top level of a CSS, but also inside any CSS conditional-group at-rule.

Font MIME Types

Format	MIME type
TrueType	font/ttf
OpenType	font/otf
Web Open Font Format	font/woff
Web Open Font Format 2	font/woff2

Notes

• Web fonts are subject to the same domain restriction (font files must be on the same domain as the page using them), unless HTTP access controls are used to relax this restriction.
• @font-face cannot be declared within a CSS selector. For example, the following will not work:

.className  @font-face  font-family: "MyHelvetica"; src: local("Helvetica Neue Bold"), local("HelveticaNeue-Bold"), url("MgOpenModernaBold.ttf"); font-weight: bold; > > 

Formal syntax

Examples

Specifying a downloadable font

This example specifies a downloadable font to use, applying it to the entire body of the document:

doctype html> html lang="en-US"> head> meta charset="utf-8" /> meta name="viewport" content="width=device-width" /> title>Web Font Sampletitle> style media="screen, print"> @font-face  font-family: "Bitstream Vera Serif Bold"; src: url("https://mdn.github.io/css-examples/web-fonts/VeraSeBd.ttf"); > body  font-family: "Bitstream Vera Serif Bold", serif; > style> head> body> This is Bitstream Vera Serif Bold. body> html> 

The output of this example code looks like so:

Specifying local font alternatives

In this example, the user’s local copy of «Helvetica Neue Bold» is used; if the user does not have that font installed (both the full font name and the Postscript name are tried), then the downloadable font named «MgOpenModernaBold.ttf» is used instead:

@font-face  font-family: "MyHelvetica"; src: local("Helvetica Neue Bold"), local("HelveticaNeue-Bold"), url("MgOpenModernaBold.ttf"); font-weight: bold; > 

Specifications

Browser compatibility

BCD tables only load in the browser

See also

Found a content problem with this page?

This page was last modified on Jul 7, 2023 by MDN contributors.

Your blueprint for a better internet.

MDN

Support

Our communities

Developers

Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
Portions of this content are ©1998– 2023 by individual mozilla.org contributors. Content available under a Creative Commons license.

Источник

Подключение шрифтов в CSS

Если не вникать в подробности, по быстрому подключить шрифт можно так:

/* Обычный */ @font-face < font-family: 'FontName'; src: url(/fonts/font.ttf); >/* Жирный */ @font-face < font-family: 'FontName bold'; src: url(/fonts/font-bold.ttf); >.text-1 < font-family: 'FontName'; font-size: 20px; >.text-2

Такой метод вполне работает в большинстве браузеров, но неверен. В данном примере упущено:

• Нет названия шрифта в свойстве local .
• Подключен только один формат шрифта.
• Неправильно настроены начертания.

Локальные шрифты

Правило @font-face src позволяет задать название локального шрифта, т.е. если у пользователя на компьютере уже установлен нужный шрифт, то будет использоваться именно он, при этом существенно увеличится скорость загрузки и отрисовки страницы.

Можно указать несколько названий:

Форматы шрифтов

Сегодня используются четыре формата, рассмотрим их подробнее:

TTF/OTF – работают в большинстве браузеров, кроме IE.

EOT – создан Microsoft, представляет сжатую копию шрифта TTF, поддерживается только в IE.

WOFF – формат представляет собой сжатый шрифт в формате TTF/OTF.

WOFF2 – имеет улучшенное сжатие, по сравнению с первой версией.

Как видно нет единого формата, который поддерживается всеми браузерами, поэтому нужно делать подключение нескольких файлов, браузер сам выберет подходящий формат. Рекомендуется подключать файлы шрифтов по приоритету:

• WOFF2 для современных браузеров.
• WOFF для браузеров, которые не поддерживают WOFF2.
• TTF для устаревших браузерах
• EOT для поддержки IE.

Если в наборе есть не все форматы, их можно получить перекодировкой с помощью сервисов onlinefontconverter.com или convertio.co.

Разные начертания шрифтов

Пример подключения шрифта «Crimson Text» в разных начертаниях:

Обычный:

Источник