This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
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 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:
- This value indicates the number of coordinate units on the em square.
|Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'units-per-em' in that specification.
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