Jquery form validation how to require minimum input

Question

I am trying to figure out how to get my jquery validation working so that if a value is less than the desired amount it will display the error code. I can't figure out how to make this work correctly. It requires at least one character to be input but I want it to be at least 4.

Any help appreciated

My validation code looks like

   if($('#firstname').val() < 3){
                $('#firstname').parent().parent().find('.form-error').html("First Name is Required");
                err++;
            }

Jeff Wright · Accepted Answer · 2014-07-11 15:56:05Z

1

You are comparing the actual value of the string instead of the length like I assume you want to. just add a .length to your condition. Like so:

if($('#firstname').val().length < 4)

edited Jul 11, 2014 at 15:56

answered Jun 6, 2013 at 4:23

Jeff Wright

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Mark Parnell · Accepted Answer · 2013-06-06 04:24:37Z

0

if($('#firstname').val().length < 4){
    ...

answered Jun 6, 2013 at 4:24

Mark Parnell

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leonhart · Accepted Answer · 2013-06-06 04:47:46Z

0

The .length may simply fix your problem.
But I suggest using regex to check the input, otherwise user can just input 4 space which will also past the .length check.

str = "    " # 4 space
str.length >= 4 # => true
str.match(/^\w{4}.*$/) # => null
another_str = "someinput"
another_str.match(/^\w{4}.*$/) # => ["someinput"]

answered Jun 6, 2013 at 4:47

leonhart

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