Question

178

Check if a check box is checked or not (js/jquery)

rated 0 times [ 181] [ 3] / answers: 1 / hits: 16993 / 12 Years ago, fri, april 20, 2012, 12:00:00

I want to check if a certain check box is selected using JavaScript/jQuery.

Here is the code I tried:

var a;

    if ($(#add_desc).checked == 1){

        a = true;

    }else{

        a= false;

    }

I have also tried:

var a;

    if ($(#add_desc).checked){

        a= true;

    }else{

        a= false;

    }

It always returns false once I alert the variable a.

Any idea why it won't work for me? Am I doing it wrong?

Thanks!

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mckaylab

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answered 12 Years ago ryans · Accepted Answer

To get the value of the checked property on a checkbox input, use the .prop() method, or get the value directly from the DOM element. [0] returns the first selected DOM element.

var a;

if ($(#add_desc)[0].checked){

    a= true;

}else{

    a= false;

}

or

var a;

if ($(#add_desc).prop(checked)){

    a= true;

}else{

    a= false;

}

Edit

For versions of jQuery older than 1.6, .prop didn't exist, use .attr as a direct replacement.