JSFiddle - React, Tailwind, and code Playground

by mamounothman

HTML

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <meta http-equiv="X-UA-Compatible" content="ie=edge" />
        <link href="https://fonts.googleapis.com/css?family=Heebo:400,500&display=swap" rel="stylesheet" />
        <style></style>
    </head>
    <body>
      <div class="log"></div>
      <button id="full-screen">
      full screen
      </button>
    </body>
</html>

JavaScript

document.getElementById("full-screen").addEventListener("click", function () {
  if (!document.fullscreenElement) {
    document.documentElement.requestFullscreen();
  } else {
    if (document.exitFullscreen) {
      document.exitFullscreen();
    }
  }
});

document.addEventListener("fullscreenchange", function (event) {
  displayButton();
});

function displayButton() {
  if (document.fullscreenElement) {
    document.querySelector(".log").innerHTML =
      "you are in full screen! click the button to toggle back!";
    document.getElementById("full-screen").textContent = "exit full screen";
  } else {
    document.getElementById("full-screen").textContent = "full screen";
    document.querySelector(".log").innerHTML =
      "Not in full screen! press <strong>`full screen</strong> button to make the browser full screen.";
  }
}

document.querySelector(".log").innerHTML =
  "Not in full screen! press <strong>`full screen</strong> button to make the browser full screen.";