nelle-observer/astro/public/scripts/sga.js

function onload() {
  if (!localStorage.getItem('sgaEnabled')) {
    disableSGA()
  }
  if (localStorage.getItem('sgaEnabled', true)) {
    enableSGA()
  }
  if (localStorage.getItem('sgaEnabled', false)) {
    disableSGA();
  }
}

function enableSGA() {
  document.getElementById("body").style.fontFamily = "standardGalactic, system-ui";
  document.getElementById("body").style.fontWeight = "lighter";
  localStorage.setItem( 'sgaEnabled', true );
  console.debug(localStorage.getItem('sgaEnabled'))
}

function disableSGA() {
  document.getElementById("body").style.fontFamily = " terminess-nf, system-ui";
  localStorage.setItem( 'sgaEnabled', false );
  console.debug(localStorage.getItem('sgaEnabled'))
}

function toggleTheme() {
  // Obtains an array of all <link>
  // elements.
  // Select your element using indexing.
  if (document.getElementById("body").style.fontFamily !== "standardGalactic, system-ui") {
    disableSGA()
  }
   else {
    enableSGA()
  }
}