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This article mainly shows you the "js regular expression how to verify URL function", the content is easy to understand, clear, hope to help you solve the doubt, the following let Xiaobian lead you to study and learn "js regular expression how to verify URL function" this article.

Core code

/ * regular expression determines whether the URL is valid * / (function () {"use strict") Var urlDict= [/ / Bad Case 'www.baidu.com', / / regular URL, address without protocol header' w.baidu.compose, / / regular URL, short subdomain name 'baidu.com', / / regular URL, only primary domain name' testing .com', / / non-conventional legitimate URL The Chinese domain name is not in the reference list: '1.2', / / incorrect domain name 'WWWW', / / invalid string '111Test', / / invalid string / / Correct Case 'http://baidu.com', / / regular URL Only the main domain name 'http://www.baidu.com', / / regular URL, the belt domain name' https://www.baidu.com/', / / regular URL, using the https protocol header, with root directory 'http://www.baidu.com/api', / / regular URL There are first-level directory resources' http://www.subdomain.baidu.com/index/subdir', / / regular URL, multi-level subdomain name, multi-level directory 'http://www.www.subdomain.baidu.com/index/subdir/',// regular URL, multi-level subdomain name, multi-level directory, directory address closure' http://io.io' / / unconventional URL, multi-level subdomain name, multi-level directory Directory address closed] / / suggested regular function isURL (str) {return!! str.match (/ ((^ https?: (?:\ /\ /)?) (?: [-;:: =\ +\ $,\ w] + @)? [A-Za-z0-9 -] + | (?: www. | [- : & =\ +\ $,\ w] + @) [A-Za-z0-9.-] +) ((?:\ / [\ +%\ /.\ wmurf _] *)?\? (?: [-\ = &;% @.\ w_] *) # (?: [\ w] *) $/ g) } / / I don't know who wrote the simple version of canonical function badRegFn (str) {return!! str.match (/ (http [s]? | ftp):\ / / [^\ /\.] +?\.. +\ wigzagg) } / / jb51 function IsURL (str_url) {var strRegex = "^ ((https | http | ftp | rtsp | mms)?: / /)" + "? (([0-9aLizhuzhuangyun'(). & = + $% -] +:)? [0-9aMuz%] + @)?" / ftp user@ + "(([0-9] {1m 3}\.) {3} 0-9] {1 URL- 3} "/ / URL- 199.194.52.184 +" | "/ / allow IP and DOMAIN (domain name) +" ([0-9a Muszmuz thanks thanks] () -] +\.) * "/ / domain name-www. + "([0-9a-z] [0-9amurz -] {0jue 61})? [0-9a-z]\." / / second-level domain name + "[Amurz] {2mer6})" / / first level domain- .com or .museum + "(: [0-9] {1jue 4})?" / / Port -: 80 + ((/?) | "/ / a slash isn't required if there" Is no file name + "(/ / 0-9a). ?: @ & = + $,% # -] + /?) $"; var re=new RegExp (strRegex); / / re.test () if (re.test (str_url)) {return (true);} else {return (false);}} / / Test case coverage (function () {var ret= {}) Var collect=function (link) {var obj= {}, fnList= [isURL,badRegFn,IsURL]; for (var iMagnList.

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