Donner supports text-transform: none and text-transform: full-width on SVG text in both text backends. The property inherits and participates in the CSS cascade through inline styles and stylesheets, including CSS-wide keywords. SVG2 does not define a text-transform presentation attribute, so a same-named attribute does not affect text styling. A nested text-transform: none restores that element's original characters.
full-width follows the CSS Text 3 mapping rules: Unicode width mappings convert narrow forms to their full-width counterparts. This includes ASCII letters, digits and punctuation, halfwidth katakana and Hangul, and width variants of symbols. Characters without a width mapping remain unchanged. Halfwidth voiced marks map to Unicode combining marks; the font backend shapes these with the adjacent kana rather than applying an extra Unicode normalization pass.
Only preserved U+0020 spaces become U+3000 IDEOGRAPHIC SPACE. Collapsed spaces stay U+0020. This applies to CSS whitespace modes and to preserved legacy xml:space. Tabs and line breaks retain their whitespace behavior. Full-width spaces participate in wrapping and hanging. CSS word spacing does not change fixed-width U+3000 spaces; collapsed U+0020 spaces still receive word spacing. Normal line layout breaks at separators. The overflow-wrap property adds Unicode-aware emergency breaks for otherwise overflowing sequences; general Unicode or CJK normal line-breaking remains unsupported.
The transformation is applied to a temporary shaping buffer. It does not change the SVG document's text, normalized source spans, DOM character counts, or the source indices used by SVG positioning lists and character metrics. Vertical orientation and font fallback use the transformed characters. The combined transformed UTF-8 and source-index payload is limited to 64 MiB per span; an oversized span produces no glyphs while its source remains available.
Case conversion (uppercase, lowercase, capitalize), full-size-kana, and combinations of those values are not implemented. Such declarations are rejected, allowing the usual cascade to retain an earlier supported value. This is partial coverage of text-transform.
The generated mapping contains 226 one-codepoint mappings from Unicode 17.0.0 UnicodeData.txt. <narrow> decompositions map forward; <wide> decompositions map in reverse. The generated header retains the Unicode License V3 notice, source URL, version, and SHA-256 digest. The full data file is not included in the repository.
To reproduce or verify the table, download the pinned Unicode data, then run:
The generator validates the pinned input digest and mapping count before comparing the output.
1.15.0 