Showing the logo with the JS library

Question

I want to copyright my JS library, or more "showing that it's ME who did it", like here.

The expected result would be that if you write

<script src="myLib.js" ></script>

It's a completely working library.

And if you write

<img src="myLib.js" />

It will show my logo.

I would like an explanation of the way to do it step by step.

P.S: The answers of Is this a web page or an image? are explaining how it can work; but what I want is to know the procedure to do for any image with any file.

Don't do this, as it will make the js file a lot bigger than needed. I've never tried embedding a JS file as an image, so it's not as if people will realise this works anyway! — Rich Bradshaw, Jul 21 '12 at 11:10

Esailija · Accepted Answer · 2012-07-21T09:45:22.947

1

It's not possible with javascript because with this trick your file has to start with 0xFF 0xD8 0xFF 0xE0... and there is no way to make javascript ignore that. It will just immediately give up because of a syntax error.

Any other binary format likely has the same problem as well. They'd need to start with 0x2F 0x2A (/*) to even consider it.

It's different with html because html is not afraid of seeing 0xFF 0xD8 0xFF 0xE0...

edited Jul 21 '12 at 09:45

answered Jul 21 '12 at 09:40

Esailija

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Then, can you tell me how I do it with HTML? – Alexandre Khoury Jul 21 '12 at 10:51
@Mageek I'm not too good with photoshop, but you should be able to insert a comment to your jpeg file. That comment should be your html. The html has to end with ` – Esailija Jul 21 '12 at 11:10
Is there a way to make it valid? (Comment that end with `-->`) – Alexandre Khoury Jul 22 '12 at 15:08
@Mageek nope because the JPEG comment ends at ` – Esailija Jul 22 '12 at 15:09
Thanks :) I found : http://www.thinkfu.com/blog/gifjavascript-polyglots And they say it's a javascript-gif polyglot. How? (You said it's not possible) – Alexandre Khoury Jul 22 '12 at 15:15
@Mageek I didn't say it's not possible altogether (just with JPEG). the GIF file starts with a valid javascript string assignment. `GIF89a=` is valid start of a javascript file. – Esailija Jul 22 '12 at 15:27

Showing the logo with the JS library

1 Answers1