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Posted 17 Oct 2011

A New Discovery?: Omitting File Extension in SRC attribute of IMG tag

, 18 Oct 2011
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Image can also be shown without specifying its extension in HTML doc if it is on server
[First of all, I don't know whether I have selected a proper section for this or not. I didn't find a perfect section for this. If the selected section for this trick is not valid, I am sorry; and if possible, I would change it if you have a good section suggestion.]

I accidently found a new thing that the extension (including the dot) of an image file can be omitted in the SRC attribute of IMG tag in HTML file.

<img src="pencil" />

is valid and showing the image if the actual file name is "pencil.jpg".

When I put 3 images pencil.png, pencil.jpg and pencil.gif in a folder and put 3 IMG tags in HTML file.
<img src="pencil" />
<img src="pencil" />
<img src="pencil" />

This code is showing 3 PNG images in Firefox and Internet Explorer; but Chrome, Opera and Safari are showing 3 JPEG images!
Omitting file extension also worked when I used stylesheet:
<div style="width:100px; height:100px; background-image:url(pencil)"></div>

It is displaying the image as background in a 100x100 pixel sized Div.

This trick worked on my computer on WAMP server (Apache) (http://localhost/example.htm), but it didn't work when I opened the file directly in browser (file:///c:/wamp/www/example.htm). This trick also worked with HTML-5 document.

I have Win 7 Ultimate 32-bit with WAMP Server 2.0c installed.
I checked this on both Windows and Linux servers but it is not working on live servers. :-(
Totally confused. It is working on my computer having server of Apache and Windows 7 OS but it is not working on live Windows or Linux servers! It is also not working when the file is opened from local harddisk.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Web Developer
India India
I am a web developer. My expertise is in PHP, HTML, CSS, JavaScript, MySQL, VB.NET, Photoshop, Flash etc. I also have some knowledge in ASP.NET, C#.NET.

I am an innovative thinker so I like to find simple, easy and innovative ways of solving day-to-day problems. I like programming and problem solving and helping people. As I am knowledge hungry; I like to use the internet and softwares to gain as much knowledge as possible.

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Comments and Discussions

QuestionNot Working in Firefox 21.0 Windows 7. Pin
Toywarrior5-Jun-13 19:28
memberToywarrior5-Jun-13 19:28 
General[I had first posted this trick in The Launge, then a user to... Pin
nikunjbhatt8419-Oct-11 1:14
membernikunjbhatt8419-Oct-11 1:14 
GeneralReason for my vote of 1 A pointless discovery, just yet anot... Pin
SteveScanlon19-Oct-11 0:23
memberSteveScanlon19-Oct-11 0:23 
GeneralThe contents of the SRC are meant to be passed verbatim to t... Pin
Richard Brett18-Oct-11 12:12
memberRichard Brett18-Oct-11 12:12 
GeneralReason for my vote of 4 Interesting. Pin
Walt Fair, Jr.16-Oct-11 6:22
subeditorWalt Fair, Jr.16-Oct-11 6:22 

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