https://sparanoid.com/lab/opentype-features/
The Complete CSS Demo for OpenType Features
The Complete CSS Demo for OpenType Features
opentype featurescompletecssdemo
https://www.pdflib.com/pdflib-cookbook/fonts/opentype_features_for_cjk/
opentype_features_for_cjk
opentype features
https://harfbuzz.github.io/shaping-opentype-features.html
OpenType features: HarfBuzz Manual
opentype featuresharfbuzzmanual
https://lunatics.icons8.com/discussion/713/misaligned-outline-and-shadow-for-rtl-text-with-fonts-that-depend-on-opentype-features
Misaligned outline and shadow for RTL text with fonts that depend on OpenType features — Lunacy...
Lunacy version: 11.6 latest stable version at the time of writing.
opentype featuresoutlineshadowrtltext