The font-size-adjust attribute allows authors to specify an aspect value for an element that will preserve the x-height of the first choice font in a substitute font.
Note: As a presentation attribute, font-size-adjust can be used as a CSS property. See the CSS font-size-adjust property for more information.
You can use this attribute with the following SVG elements:
<svg
width="600"
height="80"
viewBox="0 0 500 80"
xmlns="http://www.w3.org/2000/svg">
<text y="20" font-family="Times, serif" font-size="10px">
This text uses the Times font (10px), which is hard to read in small sizes.
</text>
<text y="40" font-family="Verdana, sans-serif" font-size="10px">
This text uses the Verdana font (10px), which has relatively large lowercase
letters.
</text>
<text
y="60"
font-family="Times, serif"
font-size="10px"
font-size-adjust="0.58">
This is the 10px Times, but now adjusted to the same aspect ratio as the
Verdana.
</text>
</svg>
| Default value | none |
|---|---|
| Value | none | <number> |
| Animatable | Yes |
none
Choose the size of the font based only on the font-size property.
<number>
Choose the size of the font so that its lowercase letters (as determined by the x-height of the font) are the specified number times the font-size.
The number specified should generally be the aspect ratio (ratio of x-height to font size) of the first choice font-family. This means that the first-choice font, when available, will appear the same size in browsers, whether or not they support font-size-adjust.
0 yields text of zero height (hidden text).
| Specification |
|---|
| CSS Fonts Module Level 4 # font-size-adjust-prop |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
font-size-adjust |
No | No | No | No | No | 16.4 | No | No | No | No | 16.4 | No |
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https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/font-size-adjust