CODEWITHSUNDEEP
jqueryjquery-validate
John
John

Reputation: 51

Applying validation on condition using jQuery Validate

Good morning guys, I wonder if you may help me on this issue: I'm applying a validation to a select element as required when another input value meets a condition. I'm using the validation jQuery plugin in order to do it. This is the pseudo-code: if(textbox == "valueX"){mySelectEelement is required;} (means that I must choose one value from the select element.). So for some reason the select element is not taking the validation I want to apply.

Please take a look on the full sample code I created for this purpose at Plunker: 

<html lang="en">
<head>
 <title></title>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.12.0/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<script src="https://code.jquery.com/ui/1.9.1/jquery-ui.js"></script>
<script>
$( function() {
$.validator.setDefaults({
      //debug: true,
      success: "valid"
    });

    $( "#myform" ).validate({
      rules: {
        borough: {
              required: false
        }
      }
    });

    $('#state').on('change', function () {
    if ($(this).val().toUpperCase() == "NY" || $(this).val().toUpperCase() == "NEW YORK") {
        $('#borough').rules('add', {
            required: true
        });
    } else{
       $('#borough').rules('remove');
    }
});    
} );
</script>

</head>
<body>
<form id="myform">
<div>
<p id="pid"></p>
<input id='text' type='text' value='other'/>
</div>
<br/>
 <input type="text" id="state" name="state"  />

  <select name="borough" id="borough">
  <option value="" select="selected"></option>
  <option value="Staten Island">Staten Island</option>
  <option value="Brooklyn">Brooklyn</option>
  <option value="Queens">Queens</option>
  <option value="NY">NY</option>
  </select>
 </form></body> </html>

Upvotes: 0

Views: 6461

Answers (1)

Sparky
Sparky

Reputation: 98758

No need for external handlers and functions. You would use the depends property under required within the rules object to contain your conditional logic...

$("#myform").validate({
    rules: {
        borough: {
            required: {
                depends: function(element) {
                    if ($('#state').val().toUpperCase() == "NY" || $('#state').val().toUpperCase() == "NEW YORK") {
                        return true;
                    } else {
                        return false;
                    }
                }
            }
        }
    }
});

DEMO: jsfiddle.net/ubkb0pmd/

And it works just as well without depends....

$("#myform").validate({
    rules: {
        borough: {
            required: function(element) {
                if ($('#state').val().toUpperCase() == "NY" || $('#state').val().toUpperCase() == "NEW YORK") {
                    return true;
                } else {
                    return false;
                }
            }
        }
    }
});

DEMO 2: jsfiddle.net/ubkb0pmd/1/

Upvotes: 7

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