Javascript: How to validate email address with JavaScript? Javascript: Kuidas kinnitada e-posti aadress JavaScript?

Posted on 13. Postitatud 13. Jun, 2009 by Dragos in Coding , JavaScript & Ajax Juuni, 2009 Dragos in kodeerimise, JavaScript ja Ajax

Here's a piece of code I found while I was browsing the JQuery UI pages to easily validate email addresses. Siin on tükk koodi leidsin kui olin sirvimise jQuery UI leheküljed hõlpsasti kinnitada e-posti aadresse.

The code below represents a general validation function, that requires two parameters:1. Kood kujutab endast üldist valideerimise funktsiooni, mis vajab kahte parameetrit: 1. the string value of an obkect and 2. stringi väärtus obkect ja 2. the regular expression to check the string against regulaaravaldise kontrollida stringi vastu

 function checkRegexp(o,regexp) { funktsiooni checkRegexp (o, Regexp) ( 
         if ( !( regexp.test( o ) ) ) { if (! (regexp.test (o))) ( 
             return false; return false; 
         } else { ) Else ( 
             return true; return true; 
         } ) 
     } )

Now, here's the following code to use in order to validate email addresses: Nüüd, siin järgmise koodi kasutada selleks, et kinnitada e-posti aadressid:

 var regex=/^((([az]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([az]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([az]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([az]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([az]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([az]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([az]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([az]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([az]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([az]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i; var RegEx =/^((([ az] | \ d | [! # \ $% & '\ * \ + \ - \ / = \? \ ^ _ `(\ |}~]|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]) + (\. ([az] | \ d | [! # \ $% & '\ * \ + \ - \ / = \? \ ^ _ `(\ |}~]|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])+)*)|(( \ x22 )(((( \ x20 | \ x09) * (\ x0d \ x0a) )? (\ x20 | \ x09 )+)?(([ \ x01-\ x08 \ x0b \ x0c \ x0e-\ x1f \ x7f] | \ x21 | [\ x23-\ x5b] | [\ x5d-\ x7e ] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]) | (\ \ ([\ x01-\ x09 \ x0b \ x0c \ x0d-\ x7f] | [\ u00A0-\ uD7FF \ uF900 - \ uFDCF \ uFDF0-\ uFFEF ]))))*((( \ x20 | \ x09) * (\ x0d \ x0a))? (\ x20 | \ x09 )+)?( \ x22 )))@( (([az] | \ d | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])|(([ az] | \ d | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0 - \ uFFEF]) ([az] | \ d | - | \ .|_|~|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])*([ az] | D \ | [ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]))) \ .)+(([ az] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])|(( [az] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]) ([az] | \ d | - | \ .|_|~|[ \ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF ])*([ az] | [\ u00A0-\ uD7FF \ uF900-\ uFDCF \ uFDF0-\ uFFEF]))) \.? $ / i; 
 var first=checkRegexp("email@email.",regex); //boolean false, because the email address is missing the tld var first = checkRegexp ( "email @ email." RegEx); / / boolean vale, sest e-posti aadress puudub TLD 
 var second=checkRegexp("email@email.tld",regex); //boolean true var teine = checkRegexp ( "email@email.tld" RegEx); / / boolean tõene

It's good to validate email addresses right on the client side, because you save server resources consumption and the client is also able to correct any errors faster, without reloading the page. It's good to validate meiliaadressid otse kliendi poole, sest teil salvestada serveri ressursside tarbimise ja klient on ka võimalus neid parandada vigu kiiremini, ümberlaadimata lehel. But you should never avoid rechecking the email (and not only emails) on the server side. Aga sa ei tohi kunagi vältida teine kontroll meiliaadress (ja mitte ainult meile) on serveripoolne.