Write to file with javascript [duplicate]

Question

I am trying to make a simple script - writing something to a txt file when u press a button. I want to set it up on a localhost (full path - E:\xampp-portable\htdocs\test).

Currently stuck with this script:

<html>
<head>
<script language="javascript">
function Write()
{
var Scr = new ActiveXObject("Scripting.FileSystemObject");
var CTF = Scr.CreateTextFile("C:\\test.txt", true);
CTF.WriteLine('test');
CTF.Close();
}
</script>
</head>
<body onLoad="Write()">
</body>
</html>

It doesnt work tho. What path should i set here - var CTF = Scr.CreateTextFile("C:\\Gyan.txt", true);? I think this is where i make my mistake. Also, are there any other simple ways to just write something to a already existing txt file with javascript?

In short, you can't. See this question: stackoverflow.com/questions/371875/… — ORION
– ORION, Commented Apr 17, 2013 at 19:53
"It doesnt work tho" — What does it do? What errors do you get? What is your test environment? — Quentin
– Quentin, Commented Apr 17, 2013 at 19:54
@Quentin, it doesnt give me any erros or anything, it doesnt do anything at all, i think its because im giving it a wrong path.. — Edgar
– Edgar, Commented Apr 17, 2013 at 19:54
What is your test environment? Where are you looking for error messages? — Quentin
– Quentin, Commented Apr 17, 2013 at 19:55
This answer - stackoverflow.com/a/373512/319878 - mentions TiddlyWiki which has a file system abstraction for many platforms - trac.tiddlywiki.org/browser/Trunk/core/js/FileSystem.js. — Paul Grime
– Paul Grime, Commented Apr 17, 2013 at 21:19

Ale · Accepted Answer · 2013-04-17 20:00:46Z

1

The JavaScript you have will possibly work with the Windows Scripting Host (of maybe with Internet Explorer, if you have very light security settings), but will not work in a browser for security reasons. Imagine visiting a website and automatically getting your desktop filled with advertisement PDFs... (at best)

What you can actually do with JavaScript in a browser is reading files, but they have to be specified by the used in a file input of a form.

Edit: look here about a way of doing this with Internet Explorer: http://4umi.com/web/javascript/filewrite.php (but it requires user interaction)

edited Apr 17, 2013 at 20:00

answered Apr 17, 2013 at 19:55

Ale

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