jQuery validation plugin question

Question

I have a web form that is using this awesome plugin and I'm trying to set up a rule. In my form, I have a Quantity field. If the Quantity field is set to 1 AND a checkbox is checked, then I want to validate a field.

My form is setup like:

Quantity      TEXTBOX      id = txtQuantity
Gift?         CHECKBOX     id = #other
Recipient     TEXTBOX      id = txtRecipient

and my jQuery code is:

txtQuantity: "required",
txtRecipientEmail: { required: "#other:checked" },

I tried:

txtRecipientEmail: { required: "#other:checked", required: "$('txtQuantity').val() == '1'" }

but that's not working

Is there another way to do this?

Nick Craver · Accepted Answer · 2010-10-21 17:51:42Z

2

required can take a function as well, which is what you want here:

txtRecipientEmail: { 
  required: function() { 
    return $("#other:checked").length && $("#txtQuantity").val() == '1'; 
  }
}

answered Oct 21, 2010 at 17:51

Nick Craver

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2 Comments

coson Over a year ago

Since I'm going to try this in a little while, if the checkbox is checked, I assume that length will return 1 else 0, right?

Nick Craver Over a year ago

@coson - yup, absolutely right, if it makes it clearer feel free to stick a > 0 in there, even though JavaScript works either way :)

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