Javascript: How to validate email address with JavaScript? Javascript: Hoe te valideren e-mailadres met JavaScript?

Posted on 13. Geplaatst op 13. Jun, 2009 by Dragos in Coding , JavaScript & Ajax Juni, 2009 door Dragos in Coding, JavaScript & Ajax

Here's a piece of code I found while I was browsing the JQuery UI pages to easily validate email addresses. Hier is een stukje code vond ik terwijl ik de jQuery UI pagina's is het browsen gemakkelijk valideren e-mailadressen.

The code below represents a general validation function, that requires two parameters:1. De onderstaande code geeft een algemene validatie functie, dat twee parameters: 1 vereist. the string value of an obkect and 2. de string waarde van een obkect en 2. the regular expression to check the string against de reguliere expressie te controleren tegen de string

 function checkRegexp(o,regexp) { functie 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: Nu, hier is de volgende code te gebruiken om e-mailadressen te valideren:

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 second=checkRegexp("email@email.tld",regex); //boolean true 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 \-\ x7f x0d] | [\ 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 ( "e-mail @ e-mail. ", regex); / / boolean false, omdat het e-mailadres ontbreekt de TLD var seconde = checkRegexp (" email@email.tld ", regex); / / boolean true

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. Het is goed om email adressen te valideren rechts op de client, omdat je server resources verbruik te besparen en de cliënt ook in staat om sneller eventuele fouten te corrigeren, zonder herladen de pagina. But you should never avoid rechecking the email (and not only emails) on the server side. Maar je mag nooit voorkomen dat hercontrole de e-mail (en niet alleen e-mails) op de server.