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Weird Things Happening With Zipcode Validator


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Hi everyone,

 

So, I am doing the zip code validator on the text:

 

var regexp = /^\d{5}(-\d{4})?$/;

regexp.test (15265-5325)

 

returns false

 

 

var regexp = /^\d{5}(-\d{4})?$/; // same code

regexp.test (15265-3325)

 

returns true

 

I have realized that unless the first number after the hyphen is less than 4, the expression will return false.

 

I tried putting ^ inside parenthesis with first (). Fixes error. But if the first digit is 1 or 0 returns false.

 

>>> var regexp = /(^\d{5})(-\d{4})?$/; regexp.test (85265-5325)

 

true

 

>>> var regexp = /(^\d{5})(-\d{4})?$/; regexp.test (15265-5325)

 

false

 

>>> var regexp = /(^\d{5})(-\d{4})?$/; regexp.test (05265-5325)

 

false

 

 

Anyone has any idea why is this happening???

 

 

var regexp = /^(\d{5})(-\d{4})?$/;

-

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Make sure you put your actual data being testing within quotes to make it a string.

 

I just ran the following and got true for all instances:

 

<!DOCTYPE html>

<html lang="en">

 <head>

   <meta charset="UTF-8">

   <title>JS regex test</title>

 </head>

 <body>

   <script>

     var regex = /^\d{5}(-\d{4})?$/;

     alert(regex.test('15265-5325')); // true

     alert(regex.test('15265-3325')); // true

     alert(regex.test('85265-5325')); // true

     alert(regex.test('05265-5325')); // true

   </script>

 </body>

</html>

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