getCSSVariables

Returns the page dimensions variables. These are predefined for the book format and can be referred to in CSS.

For example, the values for super square format are as follows:

 --width-mm: 220mm; --height-mm: 220mm; --bleed-mm: 5mm; --page-width-mm: 230mm; /* width + double bleed */ --page-height-mm: 230mm; /* height + double bleed */ --half-spread-width-mm: 225mm; --spread-width-mm: 450mm; --spread-height-mm: 230mm;