Answers for "how to make a page full screen from js"

javascript full screen

//creating a button and linking it to bClicked()
document.onload=()=>{
  let b = document.body.createElement("button");
  b.textContent = 'Fulscreen Element!';
  b.addEventListener('click', btnClicked);
}

function btnClicked(){
  document
    .getElementByID("%id of the element you want to fullscreen%")
    .requestFullscreen();
}

//to exit fullscreen
document.exitFullscreen();