1. CSS font-feature-settings

    Method of applying advanced typographic and language-specific font features to supported OpenType fonts.

  2. CSS3 font-kerning

    Controls the usage of the kerning information (spacing between letters) stored in the font. Note that this only affects OpenType fonts with kerning information, it has no effect on other fonts.

  3. canvasrenderingcontext2d api: fontkerning

  4. offscreencanvasrenderingcontext2d api: fontkerning