JSFiddle - React, Tailwind, and code Playground

by pgmann

HTML

<body onload="testLoad()" onunload="testUnload()" onbeforeunload="return testBeforeUnload()">

</body>

JavaScript

function testLoad() {
  alert('loaded');
}
function testBeforeUnload() {
  return "test before unload event";
  //console.log("test");
}
function testUnload() {
  console.log("test unload event");
}