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

function onload() {
  if (sessionStorage.getItem('sgaEnabled')) {
    enableSGA()
  }
  else {
    disableSGA()
  }
}

function enableSGA() {
  document.getElementById("body").style.fontFamily = "standardGalactic, system-ui";
  document.getElementById("body").style.fontWeight = "lighter";
  sessionStorage.setItem( 'sgaEnabled', 1);
  console.debug(sessionStorage.getItem('sgaEnabled'))
}

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

function toggleTheme() {
  // Obtains an array of all <link>
  // elements.
  // Select your element using indexing.
  if (!localStorage.getItem('sgaEnabled')) {
    enableSGA()
  }
  else {
    disableSGA()
  }
}