2.1.1 [CSS3Fonts:2018] Section 3.6. Relative sizing: the font-size-adjust property

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V0002: Number values not supported

The specification states:

 3.6. Relative sizing: the font-size-adjust property
  
         Name:               font-size-adjust
         Value:              none | <number>
         ...
  
     none
         Do not preserve the font's x-height. 
  
     <number>
         Specifies the aspect value used in the calculation below to calculate the 
         adjusted font size:

EdgeHTML Mode

Number values not supported.