The font-synthesis
CSS property controls which missing typefaces, bold or italic, may be synthesized by the browser.
font-synthesis: none; font-synthesis: weight; font-synthesis: style; font-synthesis: weight style; /* Global values */ font-synthesis: initial; font-synthesis: inherit; font-synthesis: unset;
Most standard Western fonts include italic and bold variants, but many novelty fonts do not. Fonts used for Chinese, Japanese, Korean and other logographic scripts tend not to include these variants, and synthesizing them may impede the legibility of the text. In these cases, it may be desirable to switch off the browser's default font-synthesis.
Initial value | weight style |
---|---|
Applies to | all elements. It also applies to ::first-letter and ::first-line . |
Inherited | yes |
Media | visual |
Computed value | as specified |
Animation type | discrete |
Canonical order | order of appearance in the formal grammar of the values |
This property can take any one of the following forms:
none
weight
and style
weight
and style
.none
weight
style
none | [ weight || style ]
<em class="syn">Synthesize me! 站直。</em> <br/> <em class="no-syn">Don't synthesize me! 站直。</em>
em { font-weight: bold; } .syn { font-synthesis: style weight; } .no-syn { font-synthesis: none; }
Specification | Status | Comment |
---|---|---|
CSS Fonts Module Level 3 The definition of 'font-synthesis' in that specification. | Candidate Recommendation | Initial definition |
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | No | No |
34 33 — 341 |
No | No | 9 |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
---|---|---|---|---|---|---|---|
Basic support | No | No | No | 34 | No | No | 9.1 |
1. From version 33 until version 34 (exclusive): this feature is behind the layout.css.font-features.enabled
preference (needs to be set to true
). To change preferences in Firefox, visit about:config.
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https://developer.mozilla.org/en-US/docs/Web/CSS/font-synthesis