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 | Javascript regular expression for url checkCategory: JavaScript | ||
I posted a similar post some time ago now which was a Javascript function that was suppose to validate an url. It works ok but the function is very long and didn't cover all cases. For example the url must have "www" and the address can not start with "https". So a much better way is to use a regular expression instead to match an input string with. If the function returns true the string is a valid url and else its not.
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| Tags: validation, url, regular expression, regex | |||||
| Related blog entries: - Validate your JavaScript with JSLint - Validating many fields with different types with JavaScript - Use one link to open multiple urls - Creating snapshots of a webpage - Creating a link to a Notes document in Excel or Word - Validate email-addresses in Domino with Java - JavaScript validation for a website address - JavaScript validation for numbers and date - JavaScript validation with trim and propercase | |||||
| Created by Niklas Waller - 2009-03-20 23:02:26 |
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Comments: | |
| Comment posted 2009-03-31 22:32:53 by sFBGDVBDVG shmnhmnh((ftp|(http(s)?))://)?(\.?([a-z0-9-]+))+\.[a-z]{2,6}(:[0-9]{1, 5})?(/[a-zA-Z0-9.,;\?|\'+&%\$#=~_-]+)*$!i', | |
Comment posted 2009-06-01 08:50:40 by BingoLive If you’ve ever programmed in Perl, or have had in your hands a UNIX system, then maybe you are pretty familiar with what regular expressions are. If you think that JavaScript is not well suited for your client-side Web programming needs, only useful to open pop-ups and other fancy windowing-related stuff, you don’t know the whole story. JavaScript includes full support for Perl-style regular expressions, and it's extremely useful for string matching processes, as I will try to demonstrate in the following lines.I’ll start out explaining what, exactly, regular expressions are, and what they can do for you when used in JavaScript. Finally, I’ll show some practical examples, giving a quick taste of how powerful they can be when they are utilized for client-side data validation. Just keep reading!
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| Comment posted 2009-06-01 13:17:10 by Gas Hot Water really very informative post. thanks for sharing. i think it will be helpful for every reader. | |
| Comment posted 2009-06-01 13:25:08 by Niklas Waller Well, where are the powerful and extremely useful explanations and examples? I am very eager to see them. I don't really know what you want to say with this comment. The url check above does what I want it to do. And just for your information I am aware of other languages' capability of regular expressions. See for example this post which describes a regular expression which validates en email address -> http://www.wohill.com/design/296/Validate-email-addresses-in-Domino-with-Java.html But if you just want to share your knowledge you are more than welcome 
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| Comment posted 2009-06-02 08:06:56 by Criminal Background Check Really there are a couple of issues that you need to get past before you can make sure that your Javascript pop ups can run properly on anybody else's computer. | |
| Comment posted 2009-06-03 07:14:47 by Test Equipment We might wish to consider an alternative to java script menus, which can still provide some pretty impressive effects and allows search engines to read and follow the text links. | |
| Comment posted 2009-07-08 06:48:21 by collingwood bingo live It' s really very useful post. java is also a platform independent language that's the imp. It really helpful for who found knowledge. 
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| Comment posted 2009-07-20 16:57:10 by Tom Does this page parse links? http://www.google.com | |
| Comment posted 2009-08-06 06:14:47 by Integrated SEO Nice - except the url checker you are using for this comment field does not allow non-www. . Have you considered uploading your routines to Hotscripts? | |
| Comment posted 2009-10-19 12:08:42 by tarun sachdeva check it again.. it works wrongly for many cases. it validates many invalid URL's.  
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| Comment posted 2009-10-19 12:24:48 by Niklas Ok tarun, If you have many examples of invalid URLs - show them to me or at least one??? If there are such which does not interfere with the specified requirements as written in the post I am happy to look at them and modify the script. Please also understand that this script is not checking if an URL actually exists or not, it only checks the syntax. // Niklas | |
| Comment posted 2009-10-31 12:15:02 by All Inclusive Vacations Very informative post really. I am very grateful to you. | |
| Comment posted 2010-05-06 21:09:33 by max hey! thanks for the share! i used this in my site! thaks a lot!
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