Regular expression for URL validation in JavaScript

Question

Does someone have a regex for validating urls  NOT for finding them inside a text passage   JavaScript snippet would be preferred

User · Answer

try with this    var RegExp          https  ftp           S      S            10      d 1 3   3     127      d 1 3   3     169  254      d 1 3   2     192  168      d 1 3   2     172     1 6-9  2 d 3 0-1        d 1 3   2      1-9  d  1 d d 2 01  d 22 0-3          1  d 1 2  2 0-4  d 25 0-5    2          1-9  d  1 d d 2 0-4  d 25 0-4           a-z u00a1- uffff0-9  -    a-z u00a1- uffff0-9            a-z u00a1- uffff0-9  -    a-z u00a1- uffff0-9             a-z u00a1- uffff  2          d 2 5           s      i

User · Answer

Try this regex     ftp http https        w   0 1  w      S     0-9             w        amp     -          It works best for me

User · Answer

I ve found some success with this       ftp http https        www    A-z       A-z  2        It checks one or none of the following  ftp     http     or https    It requires www  It checks for any number of valid characters  Finally  it checks that it has a domain and that domain is at least 2 characters    It s obviously not perfect but it handled my cases pretty well

User · Answer

Try this it works for me       http s         0 1  w 3 3     -a-z0-9  amp                   -a-z0-9  amp

User · Answer

lt html gt   lt head gt   lt title gt URL lt  title gt   lt script type  text javascript  gt      function validate             var url   document getElementById  url   value          var pattern     ftp http https        w   0 1  w      S     0-9             w        amp     -                 if  pattern test url                 alert  Url is valid                return true                         alert  Url is not valid                 return false          lt  script gt    lt  head gt   lt body gt  URL    lt input type  text  name  url  id  url    gt   lt input type  submit  value  Check  onclick  validate       gt   lt  body gt   lt  html gt

User · Answer

In the accepted answer bobince got it right  validating only the scheme name       and spaces and double quotes is usually enough  Here is how the validation can be implemented in JavaScript   var url    http   www google com   var valid      ftp http https               test url      true   or  var r      ftp http https                r test  http   www goo le com       false   or  var url    http www google com   var r   new RegExp    ftp http https                 r test url      false   References for syntax    MDN RegExp Object W3Schools RegExp Object

User · Answer

You can simple use type  url  in your input and the check it with checkValidity   in js  E g   your html   lt input id  foo  type  url  gt    your js      foo   on  keyup   function         if  this checkValidity                 The url is valid       else              The url is invalid

User · Answer

After a long research I build this reg expression  I hope it will help others too         url    https   google co in   var re     a-z0-9-       a-z  2 4        s lt  gt                               if   re test url       alert  url error    return false   else  alert  success

User · Answer

This REGEX is a patch from  Aamir answer that worked for me         http  ftp  s          a-z0-9-     amp          a-z  2 4        s lt  gt     quot                         gi  It matches these URL formats  yourwebsite com yourwebsite com 4564564 546564 546564  adsfasd www yourwebsite com http   yourwebsite com https   yourwebsite com ftp   www yourwebsite com ftp   yourwebsite com http   yourwebsite com 4564564 546564 546564  adsfasd

User · Answer

The actual URL syntax is pretty complicated and not easy to represent in regex  Most of the simple-looking regexes out there will give many false negatives as well as false positives  See for amusement these efforts but even the end result is not good  Plus these days you would generally want to allow IRI as well as old-school URI  so we can link to valid addresses like  http   en wikipedia org wiki    http            I would go only for simple checks  does it start with a known-good method  name  Is it free of spaces and double-quotes  If so then hell  it s probably good enough

User · Answer

I couldn t find one that worked well for my needs  Written and post   https   gist github com geoffreyrobichaux 0a7774b424703b6c0fffad309ab0ad0a   x000D   x000D  function validURL s    x000D      var regexp      ftp http https chrome             2   localhost  d 1 3    d 1 3    d 1 3    d 1 3   S   w      a-zA-Z    d 1 3      7   1    w    2      a-zA-Z  2 3         amp    d                 -      gum x000D      return regexp test s   x000D    x000D   x000D   x000D

User · Answer

I use the    a-z          i regular expression for URL validation  See an example of my cross-browser InputKeyFilter code with URL validation    x000D   x000D   lt  doctype html gt  x000D   lt html xmlns  http   www w3 org 1999 xhtml   gt  x000D   lt head gt  x000D       lt title gt Input Key Filter Test lt  title gt  x000D    lt meta name  author  content  Andrej Hristoliubov anhr mail ru  gt  x000D    lt meta http-equiv  Content-Type  content  text html  charset utf-8   gt  x000D    x000D    lt  -- For compatibility of IE browser with audio element in the beep   function  x000D   https   www modern ie en-us performance how-to-use-x-ua-compatible -- gt  x000D    lt meta http-equiv  X-UA-Compatible  content  IE 9   gt  x000D    x000D    lt link rel  stylesheet  href  https   rawgit com anhr InputKeyFilter master InputKeyFilter css  type  text css  gt    x000D    lt script type  text javascript  src  https   rawgit com anhr InputKeyFilter master Common js  gt  lt  script gt  x000D    lt script type  text javascript  src  https   rawgit com anhr InputKeyFilter master InputKeyFilter js  gt  lt  script gt  x000D    x000D   lt  head gt  x000D   lt body gt  x000D  URL   x000D   lt input type  url  id  Url  value      gt  x000D   lt script gt  x000D   CreateUrlFilter  Url   function event    onChange event x000D     inputKeyFilter RemoveMyTooltip    x000D     var elementNewInteger   document getElementById  NewUrl    x000D     elementNewInteger innerHTML   this value  x000D      x000D     x000D      onblur event  Use this function if you want set focus to the input element again if input value is NaN   empty or invalid  x000D      function event   this ikf customFilter this     x000D      x000D   lt  script gt  x000D   New URL   lt span id  NewUrl  gt  lt  span gt  x000D   x000D   lt  body gt  x000D   lt  html gt  x000D   x000D   x000D    Also see my page example of the input key filter

User · Answer

Try this regex  it works for me   function isUrl s        var regexp     ftp http https        w   0 1  w      S     0-9             w        amp     -            return regexp test s

User · Answer

http s             w -        w -            w -          a-z  2 4       0-9           w -                 w -        w -       amp         w  -

[javascript] Regular expression for URL validation (in JavaScript)

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