js match - get file extension in path

Question

How to get file extension in path using JavaScript?

alert("http://max/fi.le.rar".match(/\..*/i));

returns data since first dot

.le.rar

but I need only .rar

James · Accepted Answer · 2012-10-15 10:30:39Z

5

Try this:

"http://max/fi.le.rar".match(/\.[^.]+$/);

answered Oct 15, 2012 at 10:30

James

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1 Comment

I should comment that the returning value is an array of string

Marcel · Accepted Answer · 2012-10-15 10:48:22Z

1

var path = "http://max/fi.le.rar";
var extention = path.substring(path.lastIndexOf("."), path.length);

I did a test with substring and split from @wisdom.
After 500000 times:

.rar Execution time: 47ms (sub)
rar Execution time: 53ms (split without dot)
(after some more testing the execution times are about the same)

I have no experience with match

answered Oct 15, 2012 at 10:32

Marcel

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simply-put · Accepted Answer · 2012-10-15 10:32:33Z

0

or You can use javascript split() function like this

var str="http://max/fi.le.rar";
var n=str.split(".");
alert(n[n.length - 1]);

answered Oct 15, 2012 at 10:32

simply-put

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