units-per-em
已废弃 SVG 2
该特性已经从 Web 标准中删除，虽然一些浏览器目前仍然支持它，但也许会在未来的某个时间停止支持，请尽量不要使用该特性。
The units-per-em attribute specifies the number of coordinate units on the "em square", an abstract square whose height is the intended distance between lines of type in the same type size. This is the size of the design grid on which glyphs (en-US) are laid out.
Note: This value is almost always necessary as nearly every other attribute requires the definition of a design grid.
Only one element is using this attribute: <font-face>
Usage notes
| Value | <number> |
|---|---|
| Default value | 1000 |
| Animatable | No |
<number>- This value indicates the the number of coordinate units on the em square.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Scalable Vector Graphics (SVG) 1.1 (Second Edition) units-per-em |
Recommendation | Initial definition |
Browser compatibility
BCD tables only load in the browser