Most of the following JS codes use bookmarklets, which use bookmarks to run the JS code.
To use these, follow the instructions below.
Step 1. Make a bookmark. I hope I don't need to tell you how to do this.
Step 2: Edit URL. This is pretty simple. Right click on the bookmark and press "Edit...".
Step 3: Insert Javascript Code. Delete everything in the URL segment, put in " javascript: ", (DON'T FORGET THE COLON) and after that, paste your code.
Now, when you click the button, it should run the JS code.
Make a website say anything
var websitesaysomethingprompt = prompt("What do you want the website to say?");alert(websitesaysomethingprompt);
Make a website say 'hell'
alert("hell");
Make a website ask for your credit card number (this will not be saved anywhere)
var thisdoesn = prompt("Give me your credit card number");
Make all images fly around
R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200; DI=document.getElementsByTagName("img"); DIL=DI.length; function A(){for(i=0; i-DIL; i++){DIS=DI[ i ].style; DIS.position='absolute'; DIS.left=(Math.tan(R*x1+i*x2+x3)*x4+x5)+"px"; DIS.top=(Math.sin(R*y1+i*y2+y3)*y4+y5)+"px"}R++}setInterval('A()',5); void(0);
Edit any page
document.body.contentEditable = 'true'; document.designMode='on'; void 0
Web X-ray (better inspect)
javascript:(function () {var script=document.createElement('script');script.src='https://x-ray-goggles.mouse.org/webxray.js';script.className='webxray';script.setAttribute('data-lang','en-US');script.setAttribute('data-baseuri','https://x-ray-goggles.mouse.org');document.body.appendChild(script);}())
Break Your Screen to fix press powerbutton restart.
for (let i = 0; i < 1; i) {location.reload();}
Make the screen flash rainbow because why not? var rainbow=document.createElement("div");rainbow.style.position="absolute",rainbow.style.top="0",rainbow.style.left="0",rainbow.style.width="100%",rainbow.style.height="100%",rainbow.style.zIndex="9999",rainbow.style.pointerEvents="none",rainbow.style.opacity="0.5",document.body.appendChild(rainbow);var colors=["red","orange","yellow","green","blue","indigo","violet"],i=0;setInterval((function(){rainbow.style.backgroundColor=colors[i],i=(i+1)%colors.length}),100);
Open a tab without historyvar site = prompt("What site do you want to go to"); window.open(site, "_blank");
Takes the link you are on, and opens it on an about:blank (locally). Note that most of the time, it will take you to a 404 page.
let self = window;
var x = window.open("");
var hello = prompt("Paste the link");
self.close();
x.document.write(" <iframe src= style='position:fixed; top:0; left:0; bottom:0; right:0; width:100%; height:100%; border:none; margin:0; padding:0; overflow:hidden; z-index:999999;'> </iframe>");
//whoah.
Lets any page be in dark mode (function() {
var css = 'html {-webkit-filter: invert(100%);' +
'-moz-filter: invert(100%);' +
'-o-filter: invert(100%);' +
'-ms-filter: invert(100%); }',
head = document.getElementsByTagName('head')[0],
style = document.createElement('style');
if (!window.counter) {
window.counter = 1;
} else {
window.counter++;
if (window.counter % 2 == 0) {
var css = 'html {-webkit-filter: invert(0%); -moz-filter: invert(0%); -o-filter: invert(0%); -ms-filter: invert(0%); }'
}
}
style.type = 'text/css';
if (style.styleSheet) {
style.styleSheet.cssText = css;
} else {
style.appendChild(document.createTextNode(css));
}
head.appendChild(style);
})();