let full_screen = document.getElementById("YourBtnId");
full_screen.addEventListener("click", function () {
const docEl = document.documentElement;
const requestFullScreen =
docEl.requestFullscreen
docEl.mozRequestFullScreen
docEl.webkitRequestFullScreen
docEl.msRequestFullscreen;
const exitFullScreen =
document.exitFullscreen
document.mozCancelFullScreen
document.webkitExitFullscreen
document.msExitFullscreen;
if (
!document.fullscreenElement &&
!document.mozFullScreenElement &&
!document.webkitFullscreenElement &&
!document.msFullscreenElement
) {
requestFullScreen && requestFullScreen.call(docEl);
full_screen.innerHTML =; } else {
exitFullScreen && exitFullScreen.call(document);
full_screen.innerHTML =;
}
});