Get dynamic checkbox values with jQuery

Question

I can't get the checked values of the dynamic check box. What am I doing wrong? http://jsfiddle.net/hxfsB/17/

Markup:

<html>
    <body>
      one<input type="checkbox" name='checkbox0' value="one_name" checked>
     two<input type="checkbox" name='checkbox1' value="one_name1">
     three<input type="checkbox" name='checkbox2' value="one_name2">
         <input type="button" id="envoyer" value="Envoyer Reponse"  /> 
    </body>
</html>

Javascript:

$('#envoyer').click(function(e){
    var myArray=new Array(4);
    for ( var j = 0; j < 3; j++){ 
        var check=$('input:checkbox[name=checkbox'+j+']').is(':checked');
        if(check==true)
            myArray[j]=$('input:checkbox[name=checkbox'+j+']').val();
    }
    alert('check '+" "+myArray[i]);
});

Look at your browser's JavaScript console in the developer tools. — David Thomas
– David Thomas, Commented Jun 1, 2012 at 20:25

VisioN · Accepted Answer · 2012-06-01 20:24:32Z

5

You have an error when outputting myArray in alert (there is no i variable defined).

However, your code can be better structured. Here is one solution:

$("#envoyer").click(function(e) {
    var myArray = [];
    $(":checkbox:checked").each(function() {
        myArray.push(this.value);
    });

    alert("Checked: " + myArray.join(","));
});

DEMO: http://jsfiddle.net/hxfsB/25/

answered Jun 1, 2012 at 20:24

VisioN

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Comments

dSquared · Accepted Answer · 2012-06-01 20:24:57Z

4

You had an Uncaught ReferenceError: i is not defined; I've updated your fiddle here:

http://jsfiddle.net/hxfsB/24/

$('#envoyer').click(function(e){
    var myArray = new Array(3);
    for ( var j = 0; j < 3; j++) { 
        var check=$('input:checkbox[name=checkbox'+j+']').is(':checked');
        if(check==true)
            myArray[j]=$('input:checkbox[name=checkbox'+j+']').val();

        // Alert Current Selection //
        alert('check ' + " " + myArray[j] );
    }    
});

Keep in mind: undefined means the checkbox is NOT selected.

I hope this helps!

answered Jun 1, 2012 at 20:24

dSquared

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Comments

Jashwant · Accepted Answer · 2012-06-01 20:32:37Z

1

At your title suggests, if you want to get checked check-boxes values, you can do this,

Javascript:

$('#envoyer').click(function(e){
    $('input[type="checkbox"]:checked').each(function(){
        alert(this.value);
    })        
})

Markup

<html>
    <body>
      one<input type="checkbox" name='checkbox0' value="one_name" checked>
      two<input type="checkbox" name='checkbox1' value="one_name1">
      three<input type="checkbox" name='checkbox2' value="one_name2">
        <input type="button" id="envoyer" value="Envoyer Reponse"  /> 
    </body>
</html>

answered Jun 1, 2012 at 20:32

Jashwant

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Comments

frictionlesspulley · Accepted Answer · 2012-06-01 20:25:48Z

0

try this out : http://jsfiddle.net/hxfsB/27/

there is an issue with the selector

answered Jun 1, 2012 at 20:25

frictionlesspulley

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Comments

lucuma · Accepted Answer · 2012-06-01 20:26:07Z

0

$('#envoyer').click(function(e){
    var myArray=new Array(3);

    $('input[type=checkbox]:checked').each(function(i) {
       myArray[i] = $(this).val();
       //alert($(this).val());
    });
});

answered Jun 1, 2012 at 20:26

lucuma

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Comments

Kay · Accepted Answer · 2012-06-01 20:26:27Z

0

The i in myArray[i] doesn't exist anywhere. You need to either put the alert inside the for loop and use myArray[j] or create a new for loop using i

answered Jun 1, 2012 at 20:26

Kay

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