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Editorial Team
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Asked: 2026-05-25T01:37:15+00:00

I’m writing a JavaScript that generates some data. I intend to use it as

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I’m writing a JavaScript that generates some data. I intend to use it as a free web application, open for everyone that want to use it.

But I got a lot of time and effort to write this this script (mainly because I want it to personal use and I couldn’t find anything efficient and resumed as this). I’m a beginner developer and I know is impossible to protect or obfuscate the script because you don’t even need other app to decoding obfuscated info, there’s a lot of methods and the laziest is just find the "eval" word in the js file and replace it with "alert". When you open the html page boom you receive a popup window with all the code decoded…

What I’m asking is if there’s anyway to prevent when a user "save as…" the page with the browser, the JavaScript and CSS files do not be saved in the structure.
In the past I tried to save some pages with the browser and I only could save the html file (and sometimes not even with all the html information, I suspect there was iframes), no js and no css… I tried with some websites downloaders (sitesucker,deepvacumm,etc) and not even with this downloaders I was able to download the files. The only way was to "inspect" the page and download it manually and make the folder structure manually.

As I said I want to give this script totally free as a service (I will even buy a domain for it) because I made it with love. My only request (to receive some kind of personal pride) is that when people want to use it they came to my site and made it in real time and if they "save as…" the page, they can save the generated information that don’t save the script, so they came back again to use the service.

Does anyone can help with some tips and information. Links, advice, professional and personal tricks?

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1 Answer

  1. Editorial Team

    You could download all JavaScript/CSS files through one JavaScript file (a loader), like this. That way, downloaders have to execute JavaScript before they can know what JavaScript/CSS files are included, which I don’t think they do. As I said in my comments, I’m not entirely sure whether this works!

    HTML:

    ...
<script src="loader.js"></script>
<!-- no other JavaScript/CSS here -->
...

    loader.js:

    window.onload = function() {
    var head = document.getElementsByTagName('head')[0]; // the <head>

    var scriptElement = document.createElement('script'); // create <script>
    scriptElement.src = 'file1.js';
    head.appendChild(scriptElement); // add <script> to <head>

    var linkElement = document.createElement('link'); // create <link>
    linkElement.setAttribute('rel', 'stylesheet');
    linkElement.href = 'file1.css';
    head.appendChild(linkElement); // add <link> to <head>
}
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