Modifying the src attribute of an image tag with javascript

Question

I'm trying to perform a find/replace on the src attribute of an image tag, to remove part of the filename of the image. I assume I need to use str.replace(), but I'm not sure how to write the regex to accomplish what I'm trying to do.

The src attribute is currently

http://domain.com/path/to/file/D063DC58-6051-4B24-8CDC-D4525F72A150_tn.jpg

where /to/file/xxxxxxx_tn.jpg will vary, with the filename always ending in _tn.jpg. I'd like to remove the _tn from each instance on the page.

looks like grabbing facebook images, from _q (quick /small thumb) to _n (normal size) ;) — Jakub
– Jakub, Commented Oct 4, 2011 at 14:47
jQuery is certainly an option. It's not grabbing facebook images, FWIW. — Travis Northcutt
– Travis Northcutt, Commented Oct 4, 2011 at 14:49

Ilmari Karonen · Accepted Answer · 2011-10-04 15:08:06Z

2

var images = document.getElementsByTagName('img');

for (var i = 0; i < images.length; i++) {
    images[i].src = images[i].src.replace('_tn.jpg', '.jpg');
}

answered Oct 4, 2011 at 15:08

Ilmari Karonen

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Tarcísio Júnior · Accepted Answer · 2011-10-04 14:58:22Z

2

var srcValue = "http://domain.com/path/to/file/D063DC58-6051-4B24-8CDC-D4525F72A150_tn.jpg";

var newSrcValue = srcValue.replace(/[A-Z0-9\-]+_tn/, 'xxxxx_tn');

answered Oct 4, 2011 at 14:58

Tarcísio Júnior

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Quentin · Accepted Answer · 2011-10-04 14:47:20Z

0

You don't need to use a regular expression.

referenceToImage.src = referenceToImage.src.replace('_tn', '');

answered Oct 4, 2011 at 14:47

Quentin

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2 Comments

Travis Northcutt Over a year ago

I'll go ahead and show my ignorance and ask: what's the best way to select the image src? My javascript skills are weak at best.

Quentin Over a year ago

By using the src property as per the example in this answer.

keeganwatkins · Accepted Answer · 2011-10-04 15:35:01Z

0

if you are using jQuery >= 1.1:

$("img").attr("src", function(i, val) {
    return val.replace("_tn.jpg", ".jpg");
});

answered Oct 4, 2011 at 15:35

keeganwatkins

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