I want to print pdf from mtlnovel into one page pdf without split many page. For example https://www.mtlnovel.com/pick-up-the-invincible-world-attributes-at-the-start/chapter-1-invincible-attribute-system/

for this example page i use stylus(chrome addon) to set this css to print whole page into one page pdf without split many page.

@media print {
  @page {
    size: 148.5mm 1891mm;
  }
} 

but not every chapters of novel is same height size so i need to manually change height size of every chapter

i am novice so i don't know much can i ask how to automitically change print page height for every chapter.

for example i use Custom JavaScript for Websites 2 and this code to get height in mm

height = ((document.documentElement.offsetHeight * 0.2733)).toFixed(0);

but i don't know how to change css i want change page heignt to number i got from code above .for example something like this

@media print {
  @page {
    size: 148.5mm heightmm;
  }
} 

Edit; Ok now, i try making this and work well for me

(function() {
  document.addEventListener('keydown', (e) => {
    if (e.keyCode === 37) {
      autoresize();
    }
  });
})();

function autoresize() {
  let height = ((document.documentElement.offsetHeight * 0.2733)).toFixed(0);
  var dst2 = document.getElementById("style2");
  if (dst2 != null) {
    document.getElementById("style2").remove();
  }
  var style = document.createElement('style');
  style.type = 'text/css';
  style.id = 'style2';
  style.innerHTML = '@media print {@page {size: 148.5mm ' + height + 'mm;}}';
  if (document.body != null) {
    document.body.appendChild(style);
  }
}