Prevent DevTools

Delete.js

setInterval(function() {
  var responseTime = 100;
  var before = new Date().getTime();
  debugger;
  var after = new Date().getTime();
  if (after - before > responseTime) {
    document.body.innerHTML = "";
    location.reload();
  }
}, 50);

// One-liner
// setInterval(function(){var a=100;var b=new Date().getTime();debugger;var c=new Date().getTime();if(c-b>a){document.body.innerHTML="";location.reload();}},50);