How to use regular expressions in jQuery

Today, I will talk to you about how to use regular expressions in jQuery. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something from this article.

Basic regularity

1. The creation of regular expressions

A) var checkNum = / ^ [A-Za-z0-9] + $/; b) var re=new RegExp ("[" + S1 + "]", "g")

2. Common rules

A) user password: / ^ [a-zA-Z] [a-zA-Z0-9 _] {5jue 20} $/ b) email: / ^ [\ w -] + (\ .[\ w -] +) * @ [\ w -] + (\ .[\ w-] +) + $/ c) Mobile: / ^ [\ d] {5pm 20} $/ d) other common verification: please Baidu

3. Method: test

Case

Jquery ajax user name: check email: detect mobile phone: detect $(function () {/ / user name $("# check_username") .click (function () {var str = $("# t_username"). Val (); var ret = / ^ [a-zA-Z] [a-zA-Z0-9 _] {5jue 20} $/ If (ret.test (str)) {alert ('ok');} else {alert (' wrong');}}); / / email $("# check_email") .click (function () {var str = $("# t_email"). Val () Var ret = / ^ [\ w -] + (\ .[\ w -] +) * @ [\ w -] + (\ .[\ w -] +) + $/; if (ret.test (str)) {alert ('ok');} else {alert (' wrong');}}) / / Mobile $("# check_phone") .click (function () {var str = $("# t_phone"). Val (); var ret = / ^ [\ d] {5 str 20} $/; if (ret.test (str)) {alert ('ok');} else {alert (' wrong');}});}) After reading the above, do you have any further understanding of how to use regular expressions in jQuery? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.