Is it possible to hide the Javascript code from the html of a webpage, when the source code is viewed through the browsers View Source feature?
I know it is possible to obfuscate the code, but I would prefer it being hidden from the view source feature.
This question is related to
javascript
browser
hide
obfuscation
Put your JavaScript into separate .js file and use bundling & minification to obscure the code.
I think I found a solution to hide certain JavaScript codes in the view source of the browser. But you have to use jQuery to do this.
For example:
In your index.php
<head>
<script language = 'javascript' src = 'jquery.js'></script>
<script language = 'javascript' src = 'js.js'></script>
</head>
<body>
<a href = "javascript:void(null)" onclick = "loaddiv()">Click me.</a>
<div id = "content">
</div>
</body>
You load a file in the html/php body called by a jquery function in the js.js file.
js.js
function loaddiv()
{$('#content').load('content.php');}
Here's the trick.
In your content.php file put another head tag then call another js file from there.
content.php
<head>
<script language = 'javascript' src = 'js2.js'></script>
</head>
<a href = "javascript:void(null)" onclick = "loaddiv2()">Click me too.</a>
<div id = "content2">
</div>
in the js2.js file create any function you want.
example:
js2.js
function loaddiv2()
{$('#content2').load('content2.php');}
content2.php
<?php
echo "Test 2";
?>
Please follow link then copy paste it in the filename of jquery.js
http://dl.dropbox.com/u/36557803/jquery.js
I hope this helps.
My solution is inspired from the last comment. This is the code of invisible.html
<script src="http://code.jquery.com/jquery-1.8.2.js"></script>
<script type="text/javascript" src="invisible_debut.js" ></script>
<body>
</body>
The clear code of invisible_debut.js is:
$(document).ready(function () {
var ga = document.createElement("script"); //ga is to remember Google Analytics ;-)
ga.type = 'text/javascript';
ga.src = 'invisible.js';
ga.id = 'invisible';
document.body.appendChild(ga);
$('#invisible').remove();});
Notice that at the end I'm removing the created script. invisible.js is:
$(document).ready(function(){
alert('try to find in the source the js script which did this alert!');
document.write('It disappeared, my dear!');});
invisible.js doesn't appear in the console, because it has been removed and never in the source code because created by javascript.
Concerning invisible_debut.js, I obfuscated it, which means that it is very complicated to find the url of invisible.js. Not perfect, but enought hard for a normal hacker.
Use Html Encrypter The part of the Head which has
<link rel="stylesheet" href="styles/css.css" type="text/css" media="screen" />
<script type="text/javascript" src="script/js.js" language="javascript"></script>
copy and paste it to HTML Encrypter and the Result will goes like this
and paste it the location where you cut the above sample
<Script Language='Javascript'>
<!-- HTML Encryption provided by iWEBTOOL.com -->
<!--
document.write(unescape('%3C%6C%69%6E%6B%20%72%65%6C%3D%22%73%74%79%6C%65%73%68%65%65%74%22%20%68%72%65%66%3D%22%73%74%79%6C%65%73%2F%63%73%73%2E%63%73%73%22%20%74%79%70%65%3D%22%74%65%78%74%2F%63%73%73%22%20%6D%65%64%69%61%3D%22%73%63%72%65%65%6E%22%20%2F%3E%0A%3C%73%63%72%69%70%74%20%74%79%70%65%3D%22%74%65%78%74%2F%6A%61%76%61%73%63%72%69%70%74%22%20%73%72%63%3D%22%73%63%72%69%70%74%2F%6A%73%2E%6A%73%22%20%6C%61%6E%67%75%61%67%65%3D%22%6A%61%76%61%73%63%72%69%70%74%22%3E%3C%2F%73%63%72%69%70%74%3E%0A'));
//-->
HTML ENCRYPTER Note: if you have a java script in your page try to export to .js file and make it like as the example above.
And Also this Encrypter is not always working in some code that will make ur website messed up... Select the best part you want to hide like for example in <form> </form>
This can be reverse by advance user but not all noob like me knows it.
Hope this will help
I'm not sure there's a way to hide that information. No matter what you do to obfuscate or hide whatever you're doing in JavaScript, it still comes down to the fact that your browser needs to load it in order to use it. Modern browsers have web debugging/analysis tools out of the box that make extracting and viewing scripts trivial (just hit F12 in Chrome, for example).
If you're worried about exposing some kind of trade secret or algorithm, then your only recourse is to encapsulate that logic in a web service call and have your page invoke that functionality via AJAX.
Approach i used some years ago -
We need a jsp file , a servlet java file and a filter java file.
Give access of jsp file to user. User type url of jsp file .
Case 1 -
Using Printwriter , it will render the response to user .
Meanwhile, Servlet will create a key file .
When servlet try to execute the xxxx.js file within it , Filter
will activate and will detect key file exist and hence delete key
file .
Thus one cycle is over.
In short ,key file will created by server and will be immediatly deleted by filter .
This will happen upon every hit .
Case 2 -
Instead of File creation , one may use setting value in session variable .
'Is not possible!'
Oh yes it is ....
//------------------------------
function unloadJS(scriptName) {
var head = document.getElementsByTagName('head').item(0);
var js = document.getElementById(scriptName);
js.parentNode.removeChild(js);
}
//----------------------
function unloadAllJS() {
var jsArray = new Array();
jsArray = document.getElementsByTagName('script');
for (i = 0; i < jsArray.length; i++){
if (jsArray[i].id){
unloadJS(jsArray[i].id)
}else{
jsArray[i].parentNode.removeChild(jsArray[i]);
}
}
}
No, it isn't possible.
If you don't give it to the browser, then the browser doesn't have it.
If you do, then it (or an easily followed reference to it) forms part of the source.
Is not possbile!
The only way is to obfuscate javascript or minify your javascript which makes it hard for the end user to reverse engineer. however its not impossible to reverse engineer.
It's possible. But it's viewable anyway.
You can make this tool for yourself:
const btn = document.querySelector('.btn');
btn.onclick = textRead;
const copy = document.querySelector('.copy');
copy.onclick = Copy;
const file = document.querySelector('.file');
file.type = 'file';
const pre = document.querySelector('.pre');
var pretxt = pre;
if (pre.innerHTML == "") {
copy.hidden = true;
}
function textRead() {
let file = document.querySelector('.file').files[0];
let read = new FileReader();
read.addEventListener('load', function(e) {
let data = e.target.result;
pre.textContent = data;
});
read.readAsDataURL(file);
copy.hidden = false;
}
function Copy() {
var text = pre;
var selection = window.getSelection();
var range = document.createRange();
range.selectNodeContents(text);
selection.addRange(range);
document.execCommand('copy');
selection.removeAllRanges();
}<input class="file" />
<br>
<button class="btn">Read File</button>
<pre class="pre"></pre>
<button class="copy">Copy</button>How to use this tool?
data:text/javascript;base64,.eval(atob('Notepad Text')) to your code and change Notepad Text to your Notepad text result.How to view this hidden code?
data:text/javascript;base64,String and change String to your copied string.You could use document.write.
Without jQuery
<!DOCTYPE html>
<html>
<head><meta charset=utf-8></head>
<body onload="document.write('<!doctype html><html><head><meta charset=utf-8></head><body><p>You cannot find this in the page source. (Your page needs to be in this document.write argument.)</p></body></html>');">
</body></html>
Or with jQuery
$(function () {
document.write("<!doctype html><html><head><meta charset=utf-8></head><body><p>You cannot find this in the page source. (Your page needs to be in this document.write argument.)</p></body></html>")
});
Source: Stackoverflow.com