Entry
JavaScript: Search/Replace: Regular expression: Library: Which regular expression to extract e-mail?
Dec 8th, 2004 07:53
Knud van Eeden,
----------------------------------------------------------------------
--- Knud van Eeden --- 08 December 2004 - 05:05 pm -------------------
JavaScript: Search/Replace: Regular expression: Library: Which regular
expression to extract e-mail?
---
/[A-Za-z0-9_\-.]+\@[A-Za-z0-9_\-.]+\.([A-Za-z][A-Za-z]{2,4})/
---
---
e.g.
--- cut here: begin --------------------------------------------------
<!-------------------------------------------------------------------->
<HTML>
<!-------------------------------------------------------------------->
<SCRIPT>
alert( /[A-Za-z0-9_\-.]+\@[A-Za-z0-9_\-.]+\.([A-Za-z][A-Za-z]
{2,4})/.test( "vanessa.beau@yahoo.com" ) ); // gives true
</SCRIPT>
<!-------------------------------------------------------------------->
</HTML>
<!-------------------------------------------------------------------->
--- cut here: end ----------------------------------------------------
---
will extract all e-mail addresses with an extension of 2, 3 or 4
characters (and not more).
---
For example, it will extract and highlight any of the following:
my.first.name-my.department@mycompany.bz
my.first.name-my.department@mycompany.biz
my.first.name-my.department@mycompany.info
---
Note:
Hereby the Backus Naur diagram used to create the above regular
expression:
+-------------<------+ +-------------<------+
| | | |
->-+->-[A-Za-z0-9_-.]->-+->-[@]->-+->-[A-Za-z0-9_-.]->-+--+
|
+----------------------------<----------------------------+
|
|
| +->-[A-Za-z]-[A-Za-z]------------------->-+
| | |
| | |
+>-+->-[A-Za-z]-[A-Za-z]-[A-Za-z]---------->-+->-
| |
| |
+->-[A-Za-z]-[A-Za-z]-[A-Za-z]-[A-Za-z]->-+
---
---
[book: see also: Heinle, Nick / Pe<n~>a Bill - Designing with
JavaScript]
---
---
Internet: see also:
---
JavaScript: Regular expression: Simple: Create: How create regular
expression in JavaScript?
http://www.faqts.com/knowledge_base/view.phtml/aid/32577/fid/597
---
How do I validate the format of a URL or email?
http://www.faqts.com/knowledge_base/view.phtml/aid/22443/fid/597
---
TSE: Search/Replace: Regular expression: Library: Email: Which regular
expression to extract e-mail?
http://www.faqts.com/knowledge_base/view.phtml/aid/25674/fid/865
----------------------------------------------------------------------
